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Is Corona Tap Water Safe to Drink?

Yes! Generally Safe to Drink*

LAST UPDATED: 7:47 pm, August 6, 2022
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Table of Contents

Can You Drink Tap Water in Corona?

Yes, Corona's tap water is generally considered safe to drink as Corona has no active health based violations of the Safe Drinking Water Act (SDWA) that we are aware of. Other factors such as lead piping in a home, or low levels of pollutants on immunocompromised individuals, should also be considered, however. To find more recent info we might have, you can check out our boil water notice page or the city's water provider website.

According the EPA’s ECHO database, from April 30, 2019 to June 30, 2022, Corona's water utility, City of Corona, had 0 violations of the Safe Drinking Water Act. For more details on the violations, please see our violation history section below. The last violation for Corona was resolved on Aug. 31, 2014. This assessment is based on the City of Corona water system, other water systems in the city may have different results.

While tap water that meets the EPA health guidelines generally won’t make you sick to your stomach, it can still contain regulated and unregulated contaminants present in trace amounts that could potentially cause health issues over the long-run. These trace contaminants may also impact immunocompromised and vulnerable individuals.

The EPA is reviewing if it’s current regulations around pollutant levels in tap water are strict enough, and the health dangers posed by unregulated pollutants, like PFAS.

Water Quality Report for Corona Tap Water

The most recent publicly available numbers for measured contaminant levels in Corona tap water are in its 2020 Water Quality Report. As you can see, there are levels which the EPA considers to be acceptable, but being below the maximum allowable level doesn’t necessarily mean the water is healthy.

Lead in tap water, for example, is currently allowed at up to 15ppb by the EPA, but it has set the ideal goal for lead at zero. This highlights how meeting EPA standards doesn’t necessarily mean local tap water is healthy.

EPA regulations continue to change as it evaluates the long term impacts of chemicals and updates drinking water acceptable levels. The rules around arsenic, as well as, lead and copper are currently being re-evaluated.

There are also a number of "emerging" contaminants that are not currently. For example, PFAS (Per- and polyfluoroalkyl substances), for which the EPA has issued a health advisory. PFAS are called "forever chemicals" since they tend not to break down in the environment or the human body and can accumulate over time.

We recommend looking at the contaminants present in Corona's water quality reports, or getting your home's tap water tested to see if you should be filtering your water.

Corona Tap Water Safe Drinking Water Act Violation History - Prior 10 Years

Below is a ten year history of violations for the water system named City of Corona for Corona in California. For more details please see the "What do these Violations Mean?" section below.

From Aug. 1, 2014 to Aug. 31, 2014, Corona had 1 non-health based Safe Drinking Water Act violation with the violation category being Monitoring and Reporting, more specifically, the violation code was Monitoring, Repeat Major (TCR) which falls into the Microbials rule code group, and the Total Coliform Rules rule code family for the following contaminant code: Coliform (TCR).

Is there Lead in Corona Water?

Based on the EPA’s ECHO Database, 90% of the samples taken from the Corona water system, City of Corona, between sample start date and sample end date, were at or below, 0.003 mg/L of lead in Corona water. This is 20.0% of the 0.015 mg/L action level. This means 10% of the samples taken from Corona contained more lead.

While Corona water testing may have found 0.003 mg/L of lead in its water, that does not mean your water source has the same amount. The amount of lead in water in a city can vary greatly from neighborhood to neighborhood, or even building to building. Many buildings, particularly older ones, have lead pipes or service lines which can be a source of contamination. To find out if your home has lead, we recommend getting you water tested.

No amount of lead in water is healthy, only less dangerous. As lead accumulates in our bodies over time, even exposure to relatively small amounts can have negative health effects. For more information, please check out our Lead FAQ page.

Are there PFAS in Corona Tap Water?

Currently, testing tap water for PFAS isn’t mandated on a national level. We do have a list of military bases where there have been suspected or confirmed leaks. There appears to be at least one military base - El Toro Marine Corps Air Station - near Corona with suspected leaks.

With many potential sources of PFAS in tap water across the US, the best information we currently have about which cities have PFAS in their water is this ewg map, which you can check to see if Corona has been evaluated for yet.

Our stance is better safe than sorry, and that it makes sense to try to purify the tap water just in case.

Corona SDWA Violation History Table - Prior 10 Years

Compliance Period Status Health-Based? Category Code Code Rule Code Contaminant Code Rule Group Code Rule Family Code
08/01/2014 - 08/31/2014 Resolved No Monitoring and Reporting (MR) Monitoring, Repeat Major (TCR) (25) Total Coliform Rule (110) Coliform (TCR) (3100) Microbials (100) Total Coliform Rules (110)

What do these Violations Mean?

Safe Drinking Water Act Violations categories split into two groups, health based, and non-health based. Generally, health based violations are more serious, though non-health based violations can also be cause for concern.

Health Based Violations

  1. Maximum contaminant levels (MCLs) - maximum allowed contaminant level was exceeded.
  2. Maximum residual disinfectant levels (MRDLs) - maximum allowed disinfectant level was exceeded.
  3. Other violations (Other) - the exact required process to reduce the amounts of contaminants in drinking water was not followed.

Non-Health Based Violations

  1. Monitoring and reporting violations (MR, MON) - failure to conduct the required regular monitoring of drinking water quality, and/or to submit monitoring results on time.
  2. Public notice violations (Other) - failure to immediately alert consumers if there is a serious problem with their drinking water that may pose a risk to public health.
  3. Other violations (Other) - miscellaneous violations, such as failure to issue annual consumer confidence reports or maintain required records.

SDWA Table Key

Field Description
Compliance Period Dates of the compliance period.
Status Current status of the violation.
  • Resolved - The violation has at least one resolving enforcement action. In SDWIS, this indicates that either the system has returned to compliance from the violation, the rule that was violated was no longer applicable, or no further action was needed.
  • Archived - The violation is not Resolved, but is more than five years past its compliance period end date. In keeping with the Enforcement Response Policy, the violation no longer contributes to the public water system's overall compliance status. Unresolved violations are also marked as Archived when a system ceases operations (becomes inactive).
  • Addressed - The violation is not Resolved or Archived, and is addressed by one or more formal enforcement actions.
  • Unaddressed - The violation is not Resolved or Archived, and has not been addressed by formal enforcement.
show details
Health-Based? Whether the violation is health based.
Category Code
The category of violation that is reported.
  • TT - Treatment Technique Violation
  • MRDL - Maximum Residual Disinfectant Level
  • Other - Other Violation
  • MCL - Maximum Contaminant Level Violation
  • MR - Monitoring and Reporting
  • MON - Monitoring Violation
  • RPT - Reporting Violation
show details
Code A full description of violation codes can be accessed in the SDWA_REF_CODE_VALUES (CSV) table.
Contaminant Code A code value that represents a contaminant for which a public water system has incurred a violation of a primary drinking water regulation.
Rule Code Code for a National Drinking Water rule.
  • 110 - Total Coliform Rule
  • 121 - Surface Water Treatment Rule
  • 122 - Long Term 1 Enhanced Surface Water Treatment Rule
  • 123 - Long Term 2 Enhanced Surface Water Treatment Rule
  • 130 - Filter Backwash Rule
  • 140 - Ground Water Rule
  • 210 - Stage 1 Disinfectants and Disinfection Byproducts Rule
  • 220 - Stage 2 Disinfectants and Disinfection Byproducts Rule
  • 230 - Total Trihalomethanes
  • 310 - Volatile Organic Chemicals
  • 331 - Nitrates
  • 332 - Arsenic
  • 333 - Inorganic Chemicals
  • 320 - Synthetic Organic Chemicals
  • 340 - Radionuclides
  • 350 - Lead and Copper Rule
  • 410 - Public Notice Rule
  • 420 - Consumer Confidence Rule
  • 430 - Miscellaneous
  • 500 - Not Regulated
  • 111 - Revised Total Coliform Rule
show details
Rule Group Code Code that uniquely identifies a rule group.
  • 120 - Surface Water Treatment Rules
  • 130 - Filter Backwash Rule
  • 140 - Groundwater Rule
  • 210 - Stage 1 Disinfectants and Disinfection Byproducts Rule
  • 220 - Stage 2 Disinfectants and Disinfection Byproducts Rule
  • 230 - Total Trihalomethanes
  • 310 - Volatile Organic Chemicals
  • 320 - Synthetic Organic Chemicals
  • 330 - Inorganic Chemicals
  • 340 - Radionuclides
  • 350 - Lead and Copper Rule
  • 400 - Other
  • 500 - Not Regulated
  • 110 - Total Coliform Rules
  • 410 - Public Notice Rule
  • 420 - Consumer Confidence Rule
  • 430 - Miscellaneous
show details
Rule Family Code Code for rule family.
  • 100 - Microbials
  • 200 - Disinfectants and Disinfection Byproducts Rule
  • 300 - Chemicals
  • 400 - Other
  • 500 - Not Regulated
show details

For more clarification please visit the EPA's data dictionary.

Corona Water - Frequently Asked Questions

HOW HARD IS MY WATER?
Hardness is dissolved minerals, including calcium and magnesium. This may cause a deposit or water spots on fixtures and dishes. Our average hardness in the system is 172 ppm or 10 grains per gallon, which is classified as hard. Our water hardness can change depending on the water demand and the season.
HOW DO I FLUSH MY WATER HEATER?
We have general instructions for flushing your water heater; for specific instructions consult your user’s manual or look on the manufacturer’s website. Below are general instructions; for more information, please call (714) 736-2234.
HOW DO I CONTACT CORONA CUSTOMER SERVICE?
To contact customer service for the Corona water provider, City of Corona, please use the information below.
By Phone: 951-736-2265
By Email: stacy.joyce@coronaca.gov
By Mail: 755 Public Safety Way
CORONA, CA, 92880
HOW TO PAY BILL FOR CITY OF CORONA
Already have an account?

Existing customers can login to their City of Corona account to pay their Corona water bill by clicking here.

Want to create a new account?

If you want to pay your City of Corona bill online and haven't made an account yet, you can create an account online. Please click here to create your account to pay your Corona water bill.

Want to pay without an account?

If you don't want to make an account, or can't remember your account, you can make a one-time payment towards your Corona water bill without creating an account using a one time payment portal with your account number and credit or debit card. Click here to make a one time payment.

HOW TO START & STOP CORONA WATER SERVICE
Starting Your Service

Moving to a new house or apartment in Corona means you will often need to put the water in your name with City of Corona. In order to put the water in your name, please click the link to the start service form below. Start service requests for water bills typically take two business days.

Start Service Form

Want to create a new account?

Leaving your house or apartment in Corona means you will likely need to take your name off of the water bill with City of Corona. In order to take your name off the water bill, please click the link to the stop service form below. Stop service for water bills requests typically take two business days.

Stop Service Form

Is Corona Tap Water Safe to Drink? Tap water & safety quality

The estimated price of bottled water

$0.99 in USD (1.5-liter)

USER SUBMITTED RATINGS

Corona tap water
  • Drinking Water Pollution and Inaccessibility 50% Moderate
  • Water Pollution 38% Low
  • Drinking Water Quality and Accessibility 50% Moderate
  • Water Quality 62% High

The above data is comprised of subjective, user submitted opinions about the water quality and pollution in Corona, measured on a scale from 0% (lowest) to 100% (highest).

Related FAQS

Corona Water Quality Report (Consumer Confidence Report)

The EPA mandates that towns and cities consistently monitor and test their tap water. They must report their findings in an annual Consumer Confidence Report. Below is the most recent water quality report from Corona's Water. If you would like to see the original version of the report, please click here.

Consumer Confidence Report

2021 for the year 2020

CITY of CORONA

Department of Water and Power

“Protecting Public Health”

Message from the General Manager

Over the course of the past year the City of Corona Department of Water & Power (DWP) has remained committed to advancing the water system, ensuring the community is provided the highest quality drinking water. We are

excited to share a few completed and upcoming projects:

  • The Keith Water Storage Tank is currently under construction with an expected completion date of mid 2021. This 2.5-million- gallon pre-stressed concrete tank will provide additional operational, emergency, and fire flow storage in the City’s water distribution system.
  • The Mangular Blend Station is currently under construction with an expected completion date of mid 2022. This project will allow the blending of surface and groundwater sources, and the ability to boost water into higher pressure zones, adding redundancy and reliability to the water distribution system.

This Consumer Confidence Report provides information with respect to the water produced and distributed in 2020. This summary provides

water quality data, outlines where the water comes from, and how it compares to state standards. I am pleased to report that your tap water met all United States Environmental Protection Agency (USEPA) and State drinking water health standards. The Department of Water & Power’s staff helped ensure that our system did not exceed any of the primary Maximum Contaminant Levels (MCLs).

Tom Moody General Manager 951-736-2477 www.CoronaCA.gov/DWP

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Corona’s Water Sources

In 2020, Corona residents and businesses used approximately 10.7 billion gallons of drinking water. Corona’s water supply comes from different sources: groundwater wells owned and operated by the City of Corona provided 45.1%, 51.1% came through Lake Mathews from the Colorado River, 3.7% was from the State Water Project’s California Aqueduct and the final 0.1% was purchased from Western Municipal Water District’s Arlington Desalter treatment facility.

Water Treatment Processes

The surface water from the Colorado River requires treatment to become drinking water. The treatment process is accomplished in the City of Corona’s two surface water

treatment facilities: Sierra Del Oro and Lester. These facilities incorporate the use of coagulants, which bind small particles together to form larger particles that can be easily removed through multimedia filtration. After filtration, the water is treated with sodium hypochlorite to kill or inactivate harmful organisms. This part of the process is called disinfection.

Through independent laboratory testing, 100% of the samples taken in 2020 were free of harmful organisms.

Most of the groundwater pumped in Corona was sent through a state-of- the-art reverse osmosis membrane treatment facility, the Temescal Desalter. This facility provides removal of nitrates, per-fluorinated compounds, 1,2,3-Trichloropropane (1,2,3-TCP), perchlorates, and suspended and dissolved solids. Department ofWater and Power (DWP) adds an ammonium hydroxide solution to the disinfected water, which in conjunction with sodium hypochlorite forms a compound called chloramines. This chemical acts as a disinfectant in the distribution system and remains active

for a longer period of time than sodium hypochlorite alone. It also helps reduce the formation of disinfection byproducts that could be harmful to our health. Disinfection byproducts are formed when some disinfectants

like chlorine react with naturally occurring organic matter in the water.

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Consumer Confidence Report 2021 (for year 2020)

Sierra Del Oro Water Treatment Plant

Blending

DWP has five blending facilities that blend water with low nitrate, fluoride, perchlorate and Total Dissolved Solids (TDS) with the remaining groundwater sources to deliver safe, reliable drinking water to your tap. You will notice in the tables of detected contaminants that the groundwater exceeded the primary standard for fluoride, nitrate and perchlorate. DWP is required by law to report the range of all raw groundwater samples monitored, as well as the average concentration delivered to your tap. The averages of what you receive at your tap are much lower because DWP treats and blends water from several sources to improve water quality. The blending stations are continuously monitored and routinely sampled to ensure that the water delivered to

your tap meets all health standards with a safety margin of no less than 10%. Please refer to the “Treated Average System Water” column in the tables at the end of the report for a more accurate representation of system water quality.

For more information about fluoridation, oral health, and current issues visit: https://www.waterboards.ca.gov/drinking_water/ certlic/drinkingwater/Fluoridation.html.

Assembly Bill 1668 and Senate Bill 606

AB 1668 and SB 606 build on Governor Brown’s ongoing efforts to make water conservation a way of life in California and create a new foundation for long-term improvements in water conservation and drought planning. AB 1668 and SB 606 establish guidelines for efficient water use and a framework for the implementation and oversight of the new standards, which must be in place by 2022. The primary goals of the legislation are to use water more wisely, eliminate water waste, strengthen local drought resilience, and improve agricultural water use efficiency and drought planning.

The two bills strengthen the state’s water resiliency in the face of future droughts with provisions that include:

  • Establishing water use objectives and long-term standards for efficient water use that apply to urban retail water suppliers; comprised of indoor residential water use, outdoor residential water use, commercial,

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industrial and institutional (CII) irrigation with dedicated meters, water loss, and other unique local uses.

  • Providing incentives for water suppliers to recycle water.
  • Requiring both urban and agricultural water suppliers to set annual water budgets and prepare for drought.

Effective water conservation and efficiency practices can help extend the water supply and meet the water demand expectations well into the future. We ask that everyone be efficient in their water usage, by requiring all residents and businesses in DWP’s service area to follow the water use guidelines below:

Water Use Guidelines

  • No watering between 10 a.m. and 8 p.m.
  • Odd numbered addresses can water on Saturday, Monday, and Wednesday only.
  • Even numbered addresses can water on Sunday, Tuesday, and Thursday only.
  • Watering on Fridays is prohibited. Since government institutions are not open on weekends, they may water three days per week of the agency’s choosing.
  • Limit sprinkler times to help conserve water.
  • Leaks and broken sprinklers must be fixed in a timely manner.
  • Drip irrigation, which waters in gallons per hour, can water for a maximum of 90 minutes per day, provided there is no runoff.
  • Water cannot be allowed to run off property.
  • All swimming pools, spas, ponds, and fountains shall be equipped with re-circulating pumps.
  • Washing hard surfaces is prohibited.
  • Vehicles can only be washed using a bucket and a hose with an automatic shut-off nozzle.
    • In Corona, food establishments are prohibited from providing drinking water to patrons
      unless requested.

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Consumer Confidence Report 2021 (for year 2020)

Rebates for Water Saving

Appliances and Devices

Improve the water use efficiency at your home or business by upgrading your appliances and fixtures to water efficient models. DWP offers rebates for a variety of water saving appliances, devices, and fixtures. By upgrading your clothes washer to a high efficiency model you can save an average of 14 gallons of water per day, as well as save on energy. Using less water and energy with a high efficiency clothes washer (HECW) reduces your monthly bills

and can save you over $400 over the lifetime of the HECW. On average, nearly 30% of water usage in the home goes toward flushing the toilet. Rebates are available for residents who replace toilets that use 1.6 gallons per flush (gpf ) or more with new 1.1 gpf premium high efficiency toilets. The premium high efficiency toilets that qualify for the rebate have been certified through maximum performance (MaP) testing to ensure performance quality.

DWP offers a $50 rebate for newly-installed recirculating hot water systems. A recirculating hot water system uses a by-pass valve that connects the cold and hot water supply lines at the fixture that is farthest

away from the water heater. The by-pass valve uses the cold water line as the return loop back to the water heater, continuously recirculating hot water. We also offer free water saving showerheads and faucet aerators for the bathroom and kitchen sinks. You can pick up your free devices at the Utility Billing counter at City Hall or contact the Water Resources Team at

  1. 736-2234 or e-mail StopTheDrop@ CoronaCA.gov.

To help you improve water efficiency outdoors, DWP offers rebates on a variety of devices. Ensure your sprinklers are delivering a uniform and effective

spray stream by upgrading your sprinkler nozzles to high efficiency multi-projectory nozzles and get a rebate! Once you have your irrigation system operating efficiently, it’s time to upgrade your irrigation timer to a weather-based model that automatically adjusts the watering schedule based on the weather conditions. Never get caught watering during the rain again with a weather-based irrigation controller (WBIC).

To learn more about the rebates available, visit www.CoronaCA.gov/ Rebates.

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Water Efficiency Rebates for Businesses

DWP offers numerous rebates just for businesses to help them improve water efficiency and keep the water bill low. Available rebates for devices and fixtures include:

  • Premium High Efficiency Toilets
  • Ultra-Low and Zero Water Urinals
  • Plumbing Flow Control Valves
  • Air Cooled Ice Machines
  • Connectionless Food Steamers
  • Dry Vacuum Pump
  • Laminar Flow Restrictions
  • Conductivity and pH Controllers for Cooling Towers
  • Weather-Based Irrigation Controllers (WBICs)
  • Soil Moisture Sensor Systems
  • Rotating Nozzles for Pop-Up Spray Heads
  • Large Rotary Nozzles
  • In-Stem Flow Regulators

For more information on these and other water efficiency rebates available to Corona businesses, contact the Water Resources Team at (951) 736-2234 or e-mail StopTheDrop@CoronaCA.gov.

Water: An Undervalued Resource

Earth is called the blue planet because 71% of its surface is covered with water. Yet only 3% of the earth’s water is fresh water that can be used for drinking, with two thirds stored in ice caps and glaciers. That’s a small amount of water for everyone on the planet to share. Yet many of us don’t think twice about the water that we use every day. All too often, water that has been pumped in from afar and treated for human consumption can be seen running down the storm drains – wasted.

At a cost of less than a penny per gallon, the true value of water is not represented in the price. Water is a precious resource; we all need water to live. The drought California experienced for over seven years has proven that the water supply can be highly variable, with many factors that affect it, including drought, legislative restrictions, water quality issues, and environmental needs. We must always use our resources efficiently, and focus on sustainable water supplies. Make every drop count – use water

efficiently always.

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Consumer Confidence Report 2021 (for year 2020)

Reclaimed Water

To improve water supply reliability for the City, DWP developed and built our reclaimed water system in 2006. Utilizing reclaimed water to help meet water demands for the City reduces the impact of imported water supply shortages and costs. The reclaimed water system uses highly treated wastewater from our state-of-the-art water reclamation facilities and distributes it throughout the City. The reclaimed water system is separate from the drinking water system. Reclaimed water pipes, sprinkler caps, and signage are painted purple to easily identify them as part of the reclaimed water system. Reclaimed water is used primarily on landscaping at parks, schools, parkway areas, and

  1. few commercial buildings. By re-using water we save potable water for our homes and businesses. A rebate incentive is offered for businesses that convert their landscape irrigation and/or process operation water use to reclaimed water. Save water and get funding assistance to cover the cost of the conversion. Contact the Water Resources Team at (951) 736-2234 or by e-mail at StopTheDrop@ CoronaCA.gov to see if your business qualifies.

The City of Corona’s reclaimed water system infrastructure consists of approximately 55 miles of pipeline, three storage tanks, and six pump stations.

Of the reclaimed water produced, 1.23 billion gallons went into the reclaimed water distribution system for customer use. We currently have 388 connections, and are continually adding new sites.

From Your Drain to the Environment – Keep It Clean

While water reclamation treatment removes most pollutants, even trace amounts of some substances may be harmful to the environment. The best solution is to prevent pollution from going down the drain in the first place.

Dispose of unwanted medicine properly…

No Drugs Down the Drain!

For years, unwanted medicine was flushed down the drain to protect children and pets from accessing it, and to ensure against illegal recovery of controlled substances. Today, there are better options. Please visit the U.S. Food and Drug Administration website for more information on how to dispose of unused medicine: https://www.fda.gov/forconsumers/ consumerupdates/ucm101653.htm.

www.CoronaCA.Gov/DWP

Keep drains free of FOG – Fats, Oils and Grease

When washed down the drain, cooking fats, oils, and grease, aka “FOG,” can block sewer lines, causing raw sewage to back up into your home or into neighborhood streets and storm drains. Overflows can be costly, and pose health and environmental hazards. Keep your sewer lines FOG- free by scraping cooking fats into the garbage or into your food scrap recycling bin, where available – not down the drain.

Sanitary wipes are another item that often causes blockages in the sewer lines. They should be kept away from drains and should not be flushed down the toilet.

General Water Quality Information

Drinking water sources (both tap and bottled water) include rivers, lakes, streams, ponds, reservoirs, springs, and wells. As water travels over the surface of the land or through the ground, it dissolves naturally-occurring minerals and, in some cases, radioactive material, and can pick up substances resulting from the presence of animals or from human activity.

Contaminants that may be present in source water include:

  • Microbial contaminants, such as viruses and bacteria that may come from sewage treatment plants, septic systems, agricultural livestock operations, and wildlife.

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City Park Ion Exchange Treatment Plant

Inorganic contaminants, such as salts and metals, that can be naturally- occurring or result from urban stormwater runoff, industrial or domestic wastewater discharges, oil and gas production, mining or farming.

  • Pesticides and herbicides that may come from a variety of sources such as agriculture, urban stormwater runoff, and residential uses.
  • Organic chemical contaminants, including synthetic and volatile that are byproducts of industrial processes and petroleum production, and can also come from gas stations, urban storm water runoff, agricultural application, and septic systems.

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Consumer Confidence Report 2021 (for year 2020)

• Radioactive contaminants that can be

 

naturally-occurring or be the result

 

of oil and gas production and mining

 

activities.

 

In order to ensure that tap water is

 

safe to drink, the USEPA and the State

 

Water Resources Control Board (SWRCB)

 

prescribe regulations that limit the

Garretson Water Booster Station

amount of certain contaminants in water

provided by public water systems.

 

Drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some contaminants. The presence of contaminants does not necessarily indicate that water poses a health risk. Some people may be more vulnerable to contaminants in drinking water than the general population. Immuno-compromised persons such as persons with cancer undergoing chemotherapy, persons who have undergone organ transplants, people with HIV/AIDS or other immune system disorders, some elderly, and infants can be particularly at risk. These people should seek advice from their health care providers about drinking water. USEPA/Centers for Disease Control (CDC) guidelines on appropriate means to lessen the risk of infection by Cryptosporidium and other microbial contaminants are available from the Safe Drinking Water Hotline (1-800-426-4791).

Nitrate

Nitrate in drinking water at levels above 10 mg/L as nitrogen is a health risk especially for infants of less than six months of age because it can interfere with the capacity of the infant’s blood to carry oxygen, resulting in a serious illness; symptoms include shortness of breath and blueness of the skin. Nitrate levels above 45 ppm may also affect the ability of the blood to carry oxygen in other

individuals, such as pregnant women and those with certain specific enzyme deficiencies. If you are caring for an infant, or you are pregnant, you should ask advice from your health care provider.

Source Water Assessment

In accordance with the Federal Safe DrinkingWater Act (SDWA), the SWRCB Division of Drinking Water and Environmental Management developed a program, called the Drinking Water Source Assessment and Protection (DWSAP) Program, to assess the vulnerability of drinking water sources to contamination. Assessments of the drinking water sources for the City of Corona were completed in February 2012. The assessment concluded that the City of Corona’s sources are considered most vulnerable to the following activities not associated with any detected contaminants in the water supply: automobile – gas stations, chemical/petroleum

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pipelines, chemical/ petroleum processing/storage, dry cleaners, historic gas stations, machine shops, metal plating/finishing/fabricating, mining sand/gravel, NPDES/WDR permitted discharges, plastics/synthetics producers, septic systems – low density [<1/acre], sewer collection systems, underground storage tanks – confirmed leaking tanks, utility stations – maintenance areas, and wastewater treatment plants. A copy of the completed assessments are available through the City of Corona’s City Clerk’s office at 400 S. Vicentia, Corona, CA 92882, or by using the online Public Records Request form at https://www.CoronaCA.gov/ services/public-records-request.

Lead and Copper Rule Monitoring

The Lead and Copper Rule (LCR) was developed to protect public health by minimizing lead and copper levels in drinking water. The LCR established an action level of 15 parts per billion (ppb) for lead and 1.3 parts per million (ppm) for copper based on the 90th percentile level of tap water samples collected. Lead and copper are sampled on a mandated three year testing cycle with sampling conducted at the customer’s tap.

Parameter

Units

State

PHG

State

Date

90th

No. Sites

No. Sites

MCL

DLR

Sampled

Percentile

Sampled

Exceeding AL

 

 

 

Lead

ppb

AL=15

0.2

5

2020

3.2

53

3

Copper

ppm

AL=1.3

0.3

0.05

2020

0.16

53

0

AL

Allowable Levels

ppb

Parts per billion or micrograms per liter

DLR

Detection Limits for purposes

 

(μg/L)

 

of Reporting

ppm

Parts per million or milligrams per liter

MCL

Maximum Contaminant Level

 

(mg/L)

PHG

Public Health Goal

 

 

Lead

If present, elevated levels of lead can cause serious health problems, especially for pregnant women and young children. Lead in drinking water is primarily from materials and components associated with service lines and home plumbing. The City of Corona is responsible for providing high quality drinking water, but cannot control the variety of materials used in plumbing components. When your water has been sitting for several hours, you can minimize the potential to lead exposure by flushing your tap for 30 seconds to 2 minutes before using water for drinking or cooking. If you are concerned about lead in your water, you may wish to have your water tested. Information on lead in drinking water, testing methods, and steps you can take to minimize exposure is available from the Safe Drinking Water Hotline or at http://www.epa.gov/lead.

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Consumer Confidence Report 2021 (for year 2020)

Primary Standards – Mandatory Health-Related Standards

CLARITY

 

 

 

 

 

 

 

 

 

 

 

 

 

Please see pages 19-21 for key to abbreviations and footnotes

 

 

STATE

PHG

 

STATE

RANGE

 

 

 

 

 

MAJOR SOURCES IN

PARAMETER

UNITS

MCL

(MCLG)

 

 

 

WATER SOURCE

 

 

DLR

 

AVERAGE

 

 

 

DRINKING WATER

 

 

[MRDL]

[MRDLG]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Combined Filter Effluent

%

95(a)

NA

 

 

% < 0.3

100%

Metropolitan Water District

Soil runoff

Turbidity

NTU

TT 0.3

 

 

Highest

0.09

Henry J. Mills Water Treatment Plant

 

 

 

 

 

Combined Filter Effluent

%

95(a)

NA

 

 

% < 0.3

100%

City of Corona, Lester & Sierra Del Oro

Soil runoff

Turbidity

NTU

TT 0.3

 

 

Highest

0.07

Water Treatment Facilities

 

 

 

 

 

MICROBIOLOGICAL CONTAMINANTS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

STATE

PHG

 

STATE

RANGE

 

 

 

 

 

MAJOR SOURCES IN

PARAMETER

UNITS

MCL

(MCLG)

 

 

REGULATED IN DISTRIBUTION SYSTEM

 

DLR

 

AVERAGE

 

DRINKING WATER

 

 

[MRDL]

[MRDLG]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Total Coliform Bacteria

%

5.0 (b)

(0)

 

 

 

 

Highest % of positive samples collected

Naturally present in the environment

(State Total Coliform Rule)

 

 

 

 

 

in any one month = 0%

 

 

 

 

 

 

 

 

 

 

 

 

 

Fecal Coliform and E. Coli

(c)

(c)

(0)

 

 

 

 

Total number of positive samples collected

Human and animal fecal waste

(State Total Coliform Rule)

 

 

 

 

 

in 2020 = 0

 

 

 

 

 

 

 

 

 

 

 

 

 

Total Coliform Bacteria

%

TT (d)

 

 

 

 

Highest % of positive samples collected in

Naturally present in the environment

(Federal Total Coliform Rule)

 

 

 

 

 

any one month = 0%

 

 

 

 

 

 

 

 

 

 

 

 

 

Fecal Coliform and E. Coli

(e)

(e)

(0)

 

 

 

Total number of positive samples collected in 2020 = 0

Human and animal fecal waste

(Federal Total Coliform Rule)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Heterotrophic Plate Count

CFU/mL

TT

NA

 

NA

 

Range

 

Distribution System Wide: ND-170

Naturally present in the environment

(HPC)

 

 

Average

 

Distribution System Wide: 1

 

 

 

 

 

 

 

 

 

 

RADIOACTIVE CONTAMINANTS (w)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

STATE

PHG

STATE

 

RANGE

STATE

 

COLORADO

ARLINGTON

GROUND

TREATED

MAJOR SOURCES IN

PARAMETER

UNITS

MCL

(MCLG)

 

DLR AVERAGE

PROJECT

RIVER

WATER

WATER

AVERAGE

DRINKING WATER

 

 

[MRDL]

[MRDLG]

 

 

 

 

WATER

WATER

 

 

SYSTEM WATER

 

Gross Alpha

pCi/L

15

(0)

 

3

 

Range

ND - 4

 

ND - 3.6

3.23

ND - 19

Erosion of natural deposits

Particle Activity (k)

 

Average

ND

 

ND

6.79

 

 

 

 

 

 

 

 

 

Uranium

pCi/L

20

0.43

 

1

 

Range

ND - 2

 

2.8 - 3.4

1.2

ND - 21

Erosion of natural deposits

 

Average

ND

 

3

6.47

 

 

 

 

 

 

 

 

 

 

www.CoronaCA.Gov/DWP

13

 

 

Primary Standards – (continued)

INORGANIC CONTAMINANTS

 

 

STATE

PHG

STATE

RANGE

STATE

COLORADO

ARLINGTON

GROUND

TREATED

MAJOR SOURCES IN

PARAMETER

UNITS

MCL

(MCLG)

DLR

AVERAGE

PROJECT

RIVER

WATER

WATER

AVERAGE

DRINKING WATER

 

 

[MRDL]

[MRDLG]

 

 

WATER

WATER

 

 

SYSTEM WATER

 

Arsenic

µg/L

10

0.004

2

Range

ND

2.1

ND

ND - 4.3

ND - 2.5

Erosion of natural deposits; runoff from orchards;

Average

ND

ND

glass and electronics production wastes

 

 

 

 

 

 

 

 

Barium

mg/L

1

2

0.1

Range

ND

0.11

ND - 0.011 ND - 0.16

ND - 0.12

Discharges of oil drilling wastes and from

Average

0.028

ND

ND

metal refineries; erosion of natural deposits

 

 

 

 

 

 

 

Fluoride (h, t)

 

 

 

 

Range

0.1 - 0.9

 

ND - 0.086 0.24 - 1.1

ND - 0.76

Erosion of natural deposits; water additive

mg/L

2.0

1

0.1

Average

0.8

0.3

ND

0.38

0.25

that promotes strong teeth; discharge from

 

 

 

 

 

 

fertilizer and aluminum factories

Nitrate (as Nitrogen) (k, t)

mg/L

10

10

 

Range

 

 

3.3 - 4.9

ND - 22

ND - 10

Runoff and leaching from fertilizer use;

0.4

 

0.6

ND

 

 

 

leaching from septic tanks and sewage;

(as N)

(as N)

Average

4.1

11

3.4

 

 

 

 

 

erosion of natural deposits

 

 

 

 

 

 

 

 

 

 

 

 

Range

 

 

 

ND - 10

ND - 4.1

Perchlorate is an inorganic chemical used in solid rocket

 

 

 

 

 

 

 

 

propellant, fireworks, explosives, flares, matches, and a

 

 

 

 

 

 

 

 

 

 

 

Perchlorate (k, t)

µg/L

6

1

4

 

ND

ND

ND

 

 

variety of industries. It usually gets into drinking water

 

 

 

as a result of environmental contamination from historic

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Average

 

 

 

3.9

ND

aerospace or other industrial operations that used or use,

 

 

 

 

 

 

 

 

store, or dispose of perchlorate and its salts.

 

 

 

 

 

 

 

 

 

 

 

SYNTHETIC ORGANIC CONTAMINANTS INCLUDING PESTICIDES/PCBs

 

 

 

 

 

 

Dibromochloropropane

ng/L

200

1.7

10

(DBCP)

 

 

 

 

1,2,3-Trichloropropane

µg/L

0.005

0.0007

0.005

(1,2,3-TCP)(k, t, u)

 

 

 

 

Range

Average

Range

Average

 

 

 

ND - 34

Banned nematocide that may still be

 

 

 

present in soils due to runoff/leaching from

ND

ND

ND

ND

former use on soybeans, cotton, vineyards,

 

 

 

ND

 

 

 

tomatoes, and tree fruit

 

 

 

 

 

 

 

ND - 0.025

Discharge from industrial and agricultural chemical

 

 

 

factories; leaching from hazardous waste sites; used as

 

 

 

 

ND

ND

ND

cleaning and maintenance solvent, paint and varnish

 

 

 

ND

remover, and cleaning and degreasing agent; byproduct

 

 

 

during the production of other compounds and pesticides.

 

 

 

 

14

Consumer Confidence Report 2021 (for year 2020)

Primary Standards – (continued)

VOLATILE ORGANIC CONTAMINANTS

 

 

STATE

PHG

STATE

RANGE

STATE

COLORADO

ARLINGTON

PARAMETER

UNITS

MCL

(MCLG)

PROJECT

RIVER

 

 

[MRDL]

[MRDLG]

DLR

AVERAGE

WATER

WATER

WATER

 

 

 

 

 

Tetrachloroethylene (PCE)

µg/L

5

0.06

0.5

Range

ND

ND

Average

 

 

 

 

 

 

 

 

Trichloroethylene (TCE)

µg/L

5

1.7

0.5

Range

ND

ND

ND

Average

 

 

 

 

 

 

 

 

GROUND

TREATED

MAJOR SOURCES IN

AVERAGE

WATER

DRINKING WATER

SYSTEM WATER

 

 

ND - 0.59

ND

Discharge from factories, dry cleaners,

ND

and auto shops (metal degreaser)

 

ND - 1.4

ND

Discharge from metal degreasing sites

 

0.63

and other factories

 

Secondary Standards – Aesthetic Standards

 

 

STATE

PHG

STATE

RANGE

STATE

COLORADO

ARLINGTON

GROUND

TREATED

MAJOR SOURCES IN

PARAMETER

UNITS

MCL

(MCLG)

DLR

AVERAGE

PROJECT

RIVER

WATER

WATER

AVERAGE

DRINKING WATER

 

 

[MRDL]

[MRDLG]

 

 

WATER

WATER

 

 

SYSTEM WATER

 

Aluminum (i)

µg/L

200

600

50

Range

ND - 93

72

ND

ND

ND - 310

Erosion of natural deposits; residual from some

Max RAA

ND

171

surface water treatment processes

 

 

 

 

 

 

 

 

Chloride

mg/L

500

NA

NA

Range

60 -62

91

42 - 46

82 - 260

16 - 120

Runoff/leaching from natural deposits;

Average

61

43.8

169

73

seawater influence

 

 

 

 

 

 

Corrosivity

AI

NA

NA

NA

Range

11.9 - 12.1

12 - 13

11 - 12

Elemental balance in water;

(as Aggressiveness Index)

Average

12

13

12

affected by temperature, other factors

 

 

 

 

 

 

Iron

µg/L

300

NA

100

Range

ND

106

ND

ND - 240

ND

Leaching from natural deposits; industrial wastes

Average

ND

 

 

 

 

 

 

 

 

 

 

Manganese (f, k)

µg/L

50

NL=500

20

Range

ND

ND

ND

ND - 140

ND

Leaching from natural deposits

Average

ND

 

 

 

 

 

 

 

 

 

 

Odor Threshold

Units

3

NA

NA

Range

2

10

ND

ND - 4

ND - 2

Naturally-occurring organic materials

Average

0.63

1

 

 

 

 

 

 

 

 

 

Specific Conductance (k)

µS/cm

1600

NA

NA

Range

439 - 455

923 - 945

1,100 - 1,900

87 - 1,540

Substances that form ions when in water;

Average

447

934

1,431

644

seawater influence

 

 

 

 

 

 

Sulfate

mg/L

500

NA

0.5

Range

41 - 43

214-215

41 - 50

130 - 400

3.1 - 230

Runoff/leaching from natural deposits;

Average

42

214

45.3

222

113

industrial wastes

 

 

 

 

 

www.CoronaCA.Gov/DWP

15

 

 

Secondary Standards – Aesthetic Standards (continued)

 

 

STATE

PHG

STATE

RANGE

STATE

COLORADO

ARLINGTON

GROUND

TREATED

MAJOR SOURCES IN

PARAMETER

UNITS

MCL

(MCLG)

DLR

AVERAGE

PROJECT

RIVER

WATER

WATER

AVERAGE

DRINKING WATER

 

 

[MRDL]

[MRDLG]

 

 

WATER

WATER

 

 

SYSTEM WATER

 

Total Dissolved

mg/L

1000

NA

NA

Range

240 - 255

593 - 604

200 - 260

670 - 1,300

70 - 750

Runoff/leaching from natural deposits

Solids (j, k, t)

Average

248

598

230

907

395

 

 

 

 

 

Turbidity

NTU

5

NA

0.1

Range

ND

0.7 - 2.2

ND - 0.12

ND - 1.2

ND - 0.14

Soil runoff

Average

1.4

ND

0.23

ND

 

 

 

 

 

 

 

Unregulated Contaminants with No MCLs (g)

 

 

 

 

 

 

 

 

STATE

PHG

STATE

RANGE

STATE

COLORADO

ARLINGTON

GROUND

TREATED

 

PARAMETER

UNITS

MCL

(MCLG)

DLR

AVERAGE

PROJECT

RIVER

WATER

WATER

AVERAGE

HEALTH EFFECTS

 

 

[MRDL]

[MRDLG]

 

 

WATER

WATER

 

 

SYSTEM WATER

 

 

 

 

 

 

Range

 

 

 

0.37 - 3.4

0.13 - 0.3

The babies of some pregnant women who drink water

Boron (p)

mg/L

NA

NL=1

0.1

 

0.14

0.12

 

 

containing boron in excess of the notification level

 

 

 

may have an increased risk of developmental effects,

 

 

 

 

 

Average

 

 

 

1.9

0.21

 

 

 

 

 

 

 

 

based on studies in laboratory animals.

 

 

 

 

 

Range

 

 

 

ND - 3.4

 

Discharge from electroplating factories, leather

Hexavalent Chromium (v)

µg/L

NA

0.02

1

 

ND

ND

 

ND

tanneries, wood preservation, chemical synthesis,

 

 

refractory production, and textile manufacturing

 

 

 

 

 

Average

 

 

 

ND

 

 

 

 

 

 

 

 

 

 

facilities; erosion of natural deposits

Perfluorooctanoic acid

ng/L

NA

NL=5.1

NA

Range

ND

ND

ND - 270

ND - 9.6

Perfluorooctanoic acid exposures resulted in

(PFOA)

Average

62

2.5

increased liver weight in laboratory animals.

 

 

 

 

 

 

 

Perfluorooctanesulfonate

 

 

 

 

Range

 

 

 

ND - 250

ND - 8.3

Perfluorooctanesulfonic acid exposures resulted in

ng/L

NA

NL=6.5

NA

 

ND

ND

 

 

immune suppression, specifically, a decrease in

acid (PFOS)

 

 

 

 

 

 

 

Average

 

 

 

59

2.1

antibody response to an exogenous antigen challenge.

 

 

 

 

 

 

 

 

 

 

 

 

 

Range

 

 

4.2 - 5.4

ND - 16

ND - 3.6

The babies of some pregnant women who drink water

Vanadium

µg/L

NA

NL=50

3

 

ND

ND

 

 

 

containing vanadium in excess of the notification level

 

 

 

 

may have an increased risk of developmental effects,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Average

 

 

4.9

4.61

ND

based on studies in laboratory animals.

16

Consumer Confidence Report 2021 (for year 2020)

Federal Unregulated Contaminants

Monitoring Rule (UCMR 3) (s)

LIST 1 – ASSESSMENT MONITORING

 

 

STATE

PHG

STATE

RANGE

DISTRIBUTION

PARAMETER

UNITS

MCL

(MCLG)

DLR

AVERAGE

SYSTEM

 

 

[MRDL]

[MRDLG]

 

 

 

 

 

1,4-Dioxane

µg/L

NA

NA

0.07

Range

ND-0.14

Average

ND

 

 

 

 

 

Chlorate

µg/L

NA

NA

20

Range

75-360

Average

155

 

 

 

 

 

Chromium

µg/L

NA

NA

0.2

Range

ND-0.52

Average

ND

 

 

 

 

 

Hexavalent Chromium

µg/L

NA

NA

0.03

Range

ND-0.43

(Dissolved)

Average

0.134

 

 

 

 

Molybdenum

µg/L

NA

NA

1

Range

ND-17

Average

3.6

 

 

 

 

 

Strontium

µg/L

NA

NA

0.3

Range

25-1,100

Average

591

 

 

 

 

 

Vanadium

µg/L

NA

NA

0.2

Range

ND-6.4

Average

2.4

 

 

 

 

 

Perfluoro octanesulfonic

µg/L

NA

NA

0.04

Range

ND-0.046

acid - PFOS

Average

ND

 

 

 

 

Perfluorooctanoic acid -

µg/L

NA

NA

0.02

Range

ND-0.042

PFOA

Average

ND

 

 

 

 

Perfluoroheptanoic acid

µg/L

NA

NA

0.01

Range

ND-0.013

- PFHpA

Average

ND

 

 

 

 

Federal Unregulated Contaminants

Monitoring Rule (UCMR 4) (x)

HALOACTIC ACID (HAA) GROUP

 

 

STATE

PHG

STATE

RANGE

DISTRIBUTION

PARAMETER

UNITS

MCL

(MCLG)

DLR

AVERAGE

SYSTEM

 

 

[MRDL]

[MRDLG]

 

 

 

 

 

HAA5 (o)

µg/L

NA

NA

NA

Range

ND-15.8

Average

5.9

 

 

 

 

 

HAA6Br (y)

µg/L

NA

NA

NA

Range

ND-17.3

Average

6.1

 

 

 

 

 

HAA9 (z)

µg/L

NA

NA

NA

Range

ND-28

Average

10.2

 

 

 

 

 

Total Organic Carbon

µg/L

NA

NA

NA

Range

ND-2,600

Average

1,925

 

 

 

 

 

Bromide

µg/L

NA

NA

NA

Range

ND-32

Average

15.3

 

 

 

 

 

METALS AND METALLOIDS GROUP

 

 

 

 

 

Manganese

µg/L

NA

NA

NA

Range

ND-62

Average

2

 

 

 

 

 

If your dishwasher is new, cut back on rinsing. Newer models clean more thoroughly than older ones.

www.CoronaCA.Gov/DWP

17

 

 

Other Parameters

 

 

STATE

PHG

STATE

RANGE

STATE PROJECT

COLORADO

ARLINGTON

 

TREATED

CHEMICAL

UNITS

MCL

(MCLG)

GROUND WATER

AVERAGE

DLR

AVERAGE

WATER

RIVER WATER

WATER

 

 

[MRDL]

[MRDLG]

 

SYSTEM WATER

 

 

 

 

 

 

 

 

Alkalinity

mg/L

NA

NA

NA

Range

75 - 76

122

77 - 94

160 - 380

21 - 160

Average

76

85.7

256

80

 

 

 

 

 

 

Bicarbonate

mg/L

NA

NA

NA

Range

77 - 94

200 - 460

25 - 200

Average

85.7

312

98

 

 

 

 

 

 

 

Calcium

mg/L

NA

NA

NA

Range

21 - 22

64

27 - 30

86 - 190

2.8 - 110

Average

22

28.5

131

44

 

 

 

 

 

 

Hardness (q)

mg/L

NA

NA

NA

Range

84 - 94

254 - 255

110 - 120

300 - 710

9.6 - 430

Average

89

254

115

479

172

 

 

 

 

 

Magnesium

mg/L

NA

NA

NA

Range

9.7 - 10

25

10-11

21 - 75

0.64 - 30

Average

9.8

10.8

37

15

 

 

 

 

 

 

pH

pH Units

NA

NA

NA

Range

8.3 - 8.5

8.2

7.64 - 8.6

6.5 - 7.4

7.0 - 9.2

Average

8.4

8.1

6.9

7.9

 

 

 

 

 

 

Potassium

mg/L

NA

NA

NA

Range

2.5

4.5

ND - 1.1

1.8 - 11

ND - 5

Average

0.8

4

2.7

 

 

 

 

 

 

 

Sodium (r)

mg/L

NA

NA

NA

Range

51 - 55

89

38 - 42

49 - 170

20 - 91

Average

53

39.5

119

63

 

 

 

 

 

 

Turning off the water while washing your hair can save up to 150 gallons a month.

18Consumer Confidence Report 2021 (for year 2020)

Disinfection Byproducts, Disinfectant Residuals, and Disinfection Byproduct Precursors Federal Rule (m)

 

 

STATE

PHG

STATE

RANGE

DISTRIBUTION

MAJOR SOURCES IN

 

PARAMETER

UNITS

MCL

(MCLG)

AVERAGE/

HEALTH EFFECTS LANGUAGE

 

 

[MRDL]

[MRDLG]

DLR

LRAA/RAA

SYSTEM WIDE

DRINKING WATER

 

 

 

 

 

 

 

Total Trihalomethanes

 

 

 

 

Range

ND-32

Byproduct of drinking

Some people who drink water containing trihalomethanes in excess of

µg/L

80

NA

1

 

 

the MCL over many years may experience liver, kidney, or central nervous

(TTHMs) (n)

 

 

water disinfection

 

 

 

 

LRAA

28.5

system problems, and may have an increased risk of getting cancer.

 

 

 

 

 

 

Haloacetic Acids

µg/L

60

NA

1

Range

ND-11

Byproduct of drinking

Some people who drink water containing haloacetic acids in excess of the

 

 

(HAA5) (o)

LRAA

9.8

water disinfection

MCL over many years may have an increased risk of getting cancer.

 

 

 

 

 

 

 

 

 

 

 

Bromate (Mills -

µg/L

10

0.1

1

Range

ND-12

Byproduct of drinking

Some people who drink water containing bromate in excess of the MCL

 

 

WR-24 Conn.) (l)

Max RAA

4.3

water disinfection

over many years may have an increased risk of getting cancer.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Range

0.71-3.0

Drinking water

Some people who use water containing chloramines well in excess of the

Chloramines

mg/L

[4 as Cl2]

[4 as Cl2]

NA

 

 

disinfectant added

MRDL could experience irritating effects to their eyes and nose. Some people

 

 

who drink water containing chloramines well in excess of the MRDL could

 

 

 

 

 

Max RAA

1.95

for treatment

 

 

 

 

 

experience stomach discomfort or anemia.

 

 

 

 

 

Range

2.2-2.7

 

Total organic carbon (TOC) has no health effects. However, total organic

 

 

 

 

 

 

carbon provides a medium for the formation of disinfection byproducts.

Control of DBP

 

 

 

 

 

 

 

mg/L

TT

NA

0.3

 

 

Various natural and

These byproducts include trihalomethanes (THMs) and haloacetic acids

precursors (TOC)

 

 

manmade sources

(HAAs). Drinking water containing these byproducts in excess of the MCL may

 

 

 

 

 

 

 

 

 

 

 

Average

2.5

 

lead to adverse health effects, liver or kidney problems, or nervous system

 

 

 

 

 

 

effects, and may lead to an increased risk of cancer.

 

 

 

 

 

 

 

 

Reminder: Even wipes labeled “flushable” will clog pipes and interfere with sewage collection and treatment. Please discard

in trash, NOT the toilet.

www.CoronaCA.Gov/DWP

19

 

 

Key to Abbreviations

CFU/mL

Colony-Forming Units per

MBAS

Methylene Blue Active

NTU

Nephelometric Turbidity

ng/L

Nanograms per liter or

DBP

Milliliter

N

Substances

pCi/L

Units

RAA

parts per trillion (ng/L)

Disinfection Byproducts

Nitrogen

PicoCuries per liter

Running Annual Average

DLR

Detection Limits for

NA

Not Applicable

μg/L

Micrograms per liter or

TOC

Total Organic Carbon

 

purposes of Reporting

ND

Not Detected

 

parts per billion (ppb)

μS/cm

microSiemen per

LRAA

Locational Running Annual

NL

Notification Level

mg/L

Milligrams per liter or

 

centimeter; or micromho

 

Average

 

 

 

parts per million (ppm)

 

per centimeter (µmho/cm)

Extended Abbreviations

Maximum Contaminant Level (MCL): The highest level of a contaminant that is allowed in drinking water. Primary MCLs are set as close to the PHGs (or MCLGs) as is economically and technologically feasible. Secondary MCLs are set to protect the odor, taste and appearance of drinking water.

Maximum Contaminant Level Goal (MCLG): The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs are set by the U.S. Environmental Protection Agency.

Public Health Goal (PHG): The level of a contaminant in drinking water below which there is

no known or expected risk to health. PHGs are set by the California Environmental Protection Agency.

Primary Drinking Water Standard (PDWS): MCLs and MRDLs for contaminants that affect health along with their monitoring and reporting requirements, and water treatment requirements.

Maximum Residual Disinfectant Level (MRDL): The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.

Maximum Residual Disinfectant Level Goal (MRDLG): The level of a drinking water disinfectant below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminants.

Regulatory Action Level (AL): The concentration of a contaminant which, if exceeded, triggers treatment or other requirements that a water system must follow.

Treatment Technique (TT): A required process intended to reduce the level of a contaminant in drinking water.

Water-saving Tip: When washing your hands, turn the water off while you lather.

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Consumer Confidence Report 2021 (for year 2020)

Footnotes

  1. The turbidity level of the filtered water shall be less than or equal to 0.3 NTU in 95% of the measurements taken each month and shall not exceed 1 NTU at any time. Turbidity, a measure of the cloudiness of the water, is an indicator of treatment performance. The averages and ranges of turbidity shown in the Secondary Standards were based on the treatment plant effluent.
  2. Total coliform MCLs: No more than 5.0% of the monthly samples may be total coliform-positive. Compliance is based on the combined distribution system sampling from all the treatment plants. In 2020, 1560 samples were analyzed and there were no positive detections for total coliform. The MCL was not violated.
  3. E. coli MCL: The occurrence of two consecutive total coliform-positive samples, one of which contains E. coli, constitutes an acute MCL violation. The MCL was not violated.
  4. Total coliform TT trigger, Level 1 assessments, and total coliform TT violations: More than 5.0% total coliform-positive samples in a month trigger Level 1 assessments. Failure to conduct assessments and correct findings within 30 days is a total coliform violation. No triggers, Level 1 assessments, or violations occurred.

Lester Plant Chemical Tank Farm

  1. E. coli MCL and Level 2 TT triggers for assessments: Routine and repeat samples are total coliform-positive and either sample is E. coli-positive or system fails to collect all repeat samples following an E. coli-positive sample, or fails to test for E. coli when the repeat sample is total coliform-positive. No samples were E. coli-positive. No MCLs violations or no assessments occurred.

(f ) The high concentration of Manganese is from one groundwater well; refer to the“Treated Average System Water”column for a more accurate representation of system water quality.

  1. Unregulated contaminant monitoring helps the USEPA and the State Board determine where certain contaminants occur and whether the contaminants need to be regulated.
  2. City of Corona was in compliance with all provisions of the State’s Fluoridation System Requirements. This is part of the City of Corona’s blending plan to reduce the levels of fluoride being delivered to the consumer’s tap. Refer to the “Treated Average System Water” column for a more accurate representation of system water quality.

( i ) Aluminum has a secondary standard limit. In 2020, the secondary standard limit was exceeded but the maximum running annual average (Max RAA) was in compliance. Our current Max RAA for 2021 is 79 ug/L.

( j ) Total Dissolved Solids (TDS) is a measure of the total amount of all the materials that are dissolved in water. These minerals, both natural and anthropogenic (made by humans), are mainly inorganic solids, with a minor amount of organic material.

  1. This constituent was detected at levels exceeding the MCL, results shown in bold. Please note that this water is blended with water from other sources to provide customers with the highest quality drinking water.

www.CoronaCA.Gov/DWP

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( l ) Reported from Mills Filtration Plant Metropolitan Water District (MWD). Mills MWD water is blended with other Corona water sources. Please note that this water is blended with water from other sources to provide customers with the highest quality drinking water.

  1. The City of Corona was in compliance with all provisions of the Stage 2 Disinfectants and Disinfection Byproducts Rules (D/DBP). Compliance was based on the locational running annual average (LRAA). The average reported reflects the highest TTHM and HAA5 LRAAs for the year.
  2. Total Trihalomethanes (TTHM) is the sum of bromodichloromethane, bromoform, chloroform, and dibromochloromethane.
  3. Haloacetic Acids (HAA5) is the sum of dichloroacetic acid, trichloroacetic acid, monobromoacetic acid, dibromoacetic acid, and monochloroacetic acid.
  4. The sources that were detected for Boron are all directed to the Temescal Desalter for reverse osmosis treatment. The treated water is monitored at the effluent of the facility which is represented in the “Treated Average System Water” column.

(q)Hardness is the sum of polyvalent cations present in the water, generally magnesium and calcium. The cations are usually naturally occurring.

( r ) Sodium refers to the salt present in the water and is generally naturally occurring.

( s ) Data was collected in 2014 and reported per UCMR 3 guidance. Minimum reporting levels are as stipulated in the Federal UCMR 3. List 1 - Assessment Monitoring consists of 21 chemical contaminants for which standard analytical methods were available. All analyses conducted by contract laboratories. Values listed in state DLR column are federal minimum reporting levels.

(t) Fluoride, nitrate, perchlorate, TDS, and 1,2,3-TCP are a part of Corona’s blending remediation plan to reduce the levels being delivered to the consumer’s tap. Refer to the “Treated Average System Water” column for a more accurate representation of system water quality.

  1. 1,2,3-Trichloropropane (1,2,3-TCP) had a notification level (NL) of 0.005 ug/L until December 14, 2017, when the MCL of 0.005 ug/L became effective. 1,2,3- TCP was monitored quarterly in Corona’s source and treated waters for the State’s initial monitoring requirement and continues to be monitored per our Blending Plan requirements.
  2. There is currently no MCL for hexavalent chromium. The previous MCL of 0.010 mg/L (10 ug/L) was withdrawn on September 11, 2017. However, any hexavalent chromium results above the detection limit of 0.0001 mg/L (1 ug/L) have been reported.
  3. Results included in this section range from 2011-2019.
  4. UCMR 4 sampling began in 2018. Minimum reporting levels are as stipulated in the Federal UCMR 4. Monitoring under UCMR 4 continued through 2019 and detected results are included in the CCR.
  5. HAA6Br: Bromochloroacetic acid, bromodichloroacetic acid, dibromoacetic acid, dibromochloroacetic acid, monobromoacetic acid, and tribromoacetic acid.
  6. HAA9: Bromochloroacetic acid, bromodichloroacetic acid, chlorodibromoacetic acid, dibromoacetic acid, dichloroacetic acid, monobromoacetic acid, monochloroacetic acid, tribromoacetic acid, and trichloroacetic acid.

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Consumer Confidence Report 2021 (for year 2020)

Frequently Asked Questions

How hard is my water?

Hardness is dissolved minerals, including calcium and magnesium. This may cause a deposit or water spots on fixtures and dishes. Our average hardness in the system is 172 ppm or 10 grains per gallon, which is classified as hard. Our water hardness can change depending on the water demand and the season.

When I turn on my kitchen or bathroom faucet, the water comes out white. What is wrong?

Dissolved air in the water causes a milky appearance. When you turn on your faucet, the pressure is relieved and this allows the air to form bubbles that rise to the top of the glass. It will clear within a minute, beginning at the bottom of the glass. The water is safe to drink.

How do I flush my water heater?

We have general instructions for flushing your water heater; for specific instructions consult your user’s manual or look on the manufacturer’s website. Below are general instructions; for more information, please call (714) 736-2234.

  1. Turn the gas valve to “pilot.”
  2. Hook up a garden hose to the water heater and find a proper location to drain the water; use caution – water will be hot when it comes out.
  3. Open the valve until all of the hot water has drained from the water heater.
  4. Close the valve where the garden hose is hooked up.
  5. Allow the heater to fill up, and then close the cold water supply on top of the water heater.
  6. Open up the hose bib again and let it drain.
  7. Repeat the cycle a couple of times.
  8. Disconnect the garden hose, turn the water supply back on and turn the gas valve to the “on” position.

www.CoronaCA.Gov/DWP

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My water pressure has been very high recently, what’s wrong?

The City has six separate water pressure zones. Your pressure should be constant throughout the day, but may decrease 3 - 5 pounds when system demands go up, such as during the night when a lot of water is used for irrigation. If your pressure has suddenly increased, it may mean that your pressure regulator needs to be adjusted or replaced. Call us at (714) 736-2234 and we will be happy to help troubleshoot the issue for you.

There is odor coming from my water, what’s wrong? Is the water safe to drink?

We sometimes receive phone calls from customers stating that their water smells. However, the source of the odor is usually not the water, but from something else in the home. To test this, simply fill a glass with water and smell it. If the water itself does not smell, but you still smell the odor, there could be another issue such as a sink that needs to have the garbage disposal cleaned or run. A front loading washing machine can also develop an odor from mold if the lid remains closed.

Did you know?

  • There are 748 gallons of water in one unit of water.
  • One acre-foot of water equals 325,829 gallons or 435.6 billing units.
  • One acre-foot of water can supply two typical families with water for a whole year.
  • A leaky toilet can waste between 30 to 500 gallons of water per day.
  • Most hot water heater manufacturers recommend annual flushing of the hot water tank to remove sediment and stagnant water, which can lead to odor and clogged aerators.

To change the language of this report, please select the language under “Translate” in the upper menu features found at https:// www.coronaca.gov/government/departments-divisions/ department-of-water-and-power/about-dwp/consumer- confidence-report.

Español: Para cambiar el idioma de este reporte, seleccione el idioma

en“Translate” en las funciones del menú que se encuentra en: https:// www.coronaca.gov/government/departments-divisions/ department-of-water-and-power/about-dwp/consumer- confidence-report.

If you are interested in participating in decisions that affect the quality and supply of the water in the City of Corona, or for general information about this report and questions related to water quality, please call (714) 736-2234.

Regular City Council meetings are held on the first and third Wednesday of every month.

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Consumer Confidence Report 2021 (for year 2020)

Corona Cares About Climate Change!

The City of Corona acknowledges that we play an important role in reducing the impacts of climate change and are committed to doing what we can to reduce greenhouse gas (GHG) emissions. To meet California’s ambitious climate goals, Assembly Bill (AB) 341 – Mandatory Commercial Recycling requires businesses and multi- family complexes who produce a certain amount of solid waste per week to arrange for recycling services. AB 1826 – Mandatory Commercial Organics Recycling requires businesses and multi-family complexes to arrange for organic waste recycling services. More recently, California’s Senate Bill (SB) 1383 – Short Lived Climate Pollutants expands recycling mandates to residents and sets out to achieve a 75% reduction in the level of statewide organic waste disposal to landfills by 2025.

Our Corona Recycles team is excited to work with our City’s residents and businesses to ensure that everyone implements proper recycling and organic waste recycling practices. Adopting new recycling behavior can be challenging,

but our team is here to serve you! If you are a business or a multi-family complex who needs assistance in getting in compliance with the recycling and organic waste recycling requirements, please complete the Recycling Compliance Self-Reporting Form found on our website www.CoronaCA.gov/Recycle, if

you haven’t done so already. This allows us to assess your facility for the needed services and to determine eligibility for possible exemptions.

The cities website offers solid waste and recycling educational material related to SB 1383 which will go into effect on January 1, 2022. Learn the importance of diverting organic waste from landfills, the impact methane emissions have on our environment, and the simple practices and steps you can take to make a change! We walk you through the importance of the 3 R’s of recycling (Reduce, Reuse, and Recycle) and provide guidance on simple practices you can implement at home and at the workplace. Each R is an integral part the recycling cycle, but we recognize that a reduction in our daily consumption can have a significant impact and may contribute to the realization of a more sustainable Corona. As such, we encourage you to visit our website to learn how you can reduce first and then reuse and recycle!

Remember, our team is here to help you. To request additional information or assistance, contact CoronaRecycles@ CoronaCA.gov.

We thank you for your continuous cooperation and look forward to working with you to contribute to California’s statewide vision for a sustainable future!

City of Corona

Department of Water and Power

P.O. Box 950

Corona, CA 92878

Contaminants


City of Corona

EWG's drinking water quality report shows results of tests conducted by the water utility and provided to the Environmental Working Group by the California State Water Resources Control Board, as well as information from the U.S. EPA Enforcement and Compliance History database (ECHO). For the latest quarter assessed by the U.S. EPA (January 2019 - March 2019), tap water provided by this water utility was in compliance with federal health-based drinking water standards.

Utility details

  • Serves: 155896
  • Data available: 2012-2017
  • Data Source: Purchased surface water
  • Total: 33

Contaminants That Exceed Guidelines

  • 1%2C2%2C3-Trichloropropane
  • Arsenic
  • Bromodichloromethane
  • Bromoform
  • Chloroform
  • Chromium (hexavalent)
  • Dibromochloromethane
  • Dichloroacetic acid
  • Nitrate
  • Nitrate and nitrite
  • Perfluorooctane sulfonate (PFOS)
  • Perfluorooctanoic acid (PFOA)
  • Total trihalomethanes (TTHMs)
  • Uranium

Other Detected Contaminants

  • 1%2C2-Dibromo-3-chloropropane (DBCP)
  • 1%2C4-Dioxane
  • Aluminum
  • Barium
  • Bromochloroacetic acid
  • Chlorate
  • Dibromoacetic acid
  • Fluoride
  • Haloacetic acids (HAA5)
  • Manganese
  • Molybdenum
  • Perchlorate
  • Perfluoroheptanoic acid (PFHPA)
  • Selenium
  • Strontium
  • Tetrachloroethylene (perchloroethylene)
  • Trichloroacetic acid
  • Trichloroethylene
  • Vanadium

Reminder

Always take extra precautions, the water may be safe to drink when it leaves the sewage treatment plant but it may pick up pollutants during its way to your tap. We advise that you ask locals or hotel staff about the water quality. Also, note that different cities have different water mineral contents.

Sources and Resources

Corona Tap Water

The Corona County government conducted a study in 2021 that was meant to determine if the tap water in Corona, California was of adequate quality to warrant selling it as public supply. It was determined that although there were some cases of contamination, the vast majority of the water showed no signs of contamination. That report caused a stir, because this is one of the largest towns in Southern California and many people are concerned about what contaminants may be lurking in the water. This article will show you just a few of the things that are in our drinking water, so that you can make an educated decision about whether or not your water is okay.

Just over a decade ago, a group of companies came up with an innovative plan to clean up the Corona County water. Their plan called for special filtering equipment to be installed in local homes. The idea was that this equipment would remove nearly all of the naturally occurring elements that you would find in water from most other areas. They also hoped that the water coming into Corona would be a lot cleaner than the tap water that comes from other areas.

In recent years, the cleanup efforts have been slowed down considerably. Many Corona residents worry that they are still not getting enough of the beneficial elements from the water. The Corona County Environmental Health Office recommends that you buy an effective home water filter system to provide you with the most beneficial water possible. There are many good systems out on the market to choose from, and if you research the internet you can easily find a great deal on one.

Corona Drinking Water

When you decide that you are going to take the time to check out your Corona California drinking water, you may be surprised at what you find. The thing that surprises most people is that there is not a whole lot in the way of contaminants in the water. Sure, there are all kinds of things that are in the water, and some of them are probably bad for you. However, most of them are likely much less dangerous than chlorine, plastic bags, and other things that you might commonly find in your drinking water.

If you are used to drinking bottled water then you will most likely be shocked at what you find out. One thing that you will probably notice is that you can buy bottles with different logos and even colors nowadays. This is due to all of the money that has been put into bottled water and bottled water containers. Although this is something that we all want, it is something that is not going to be able to last forever. It would be wise to get a bottle with the logo of your favorite sports team if you have one so that everyone knows what you are drinking.

The only problem that you might run into when checking out your Corona California drinking water is that you won’t know where to look. There are a lot of different places that you can go to in order to check your water and find out what kind of contaminants it contains. In fact, it might be a good idea for you to check out your own local water source as well just to make sure. After all, the water that you end up drinking will come from an underground aquifer, so you need to know where it is coming from in the first place.

Corona Water Treatment

If you are serviced by a public treatment facility, then there is a Corona California water treatment facility just for you. Corona is one of the largest cities in the State of California and the second largest city in the entire State of California. It is also one of the most educated and industrialized cities in all of California. The water that comes through your tap in Corona is treated to make sure that it is safe for consumption.

Water is treated by filtration to remove chemicals, metals, bacteria, and other pollutants. There are three main water filtration plants that work together to provide clean, clear, and healthy water for all of the people in Corona and the surrounding areas. These plants include the Department of Environmental Health, the City of Corona’s Drinking Water Treatment Division, and the private company, Torrey Pines. The Department of Environmental Health is responsible for making sure that all of the testing and cleaning is done properly. They test the water samples and send them out to the different water treatment plants around the city.

The City of Corona’s drinking water division is responsible for cleaning up the water plant on a regular basis, testing for bacteria and pesticides, and making sure that they are following all regulations that they must abide by. All of these are important jobs that they do very well. However, if you want to have clean, great tasting water, you need to have your water tested from time to time as well.

Corona Water Supplies

Are you wondering if you have Corona California water supplies? If you are, then you know you need to take care of them in order to be able to enjoy your swimming pool and all the other great things that come from having a clean water supply. You don’t want to find out too late in the game that your water supply is contaminated, so it is important to find a reliable company to deliver your water to you. This means finding a local company that has a strong reputation for delivering clean, healthy water.

The Corona California water supplies aren’t the only thing that needs to be taken care of, either. In fact, you can’t even begin to fathom all the different elements that are going into your home’s water supply in order to ensure that it remains clean and pure at all times. From the water that is heated and sent through the pipes in your home to the various chemicals that are used in order to kill harmful bacteria in your drinking water, there are so many different elements that can affect your water at any given time. It’s important to be sure to keep your water supplies as clean and pure as possible, because even the smallest trace of bacteria or other harmful elements can turn into a huge problem down the road.

You’ll also want to make sure that the Corona California water supplies are regularly tested. Just like in most areas of the world, you will find that most water tests are done twice a year, which means that you will know if there are any problems with your water before they get out of hand and cause damage to your home or health. These water tests can alert you to potential problems long before they develop into more harmful problems, so it’s important that you take the extra steps necessary to be sure that your home’s water supply stays pure at all times. If you don’t test your water yourself, find a reliable company to do it for you.

Corona Water Quality

Do you know how to judge the Corona California water quality? If you live in or near Los Angeles, you should know that your water comes from the same source as the Southern Pacific Ocean. That means it is a raw product, so it contains all sorts of contaminants, including everything from chemicals to microscopic pathogens. It also contains high levels of salt, just because the water passes through the ocean. A local business called Aqua Conservancy has been working to improve the quality of the water in the area for more than 20 years.

The company takes a number of steps to ensure that the water coming through its faucets is as clean as it can possibly be. It purifies the water through distillation and then replaces the salt with potassium and magnesium. Only the best water is sent out, so you will not have to worry about wasting water. It also uses solar power to function, so it will be able to operate even when the sun is not out.

You should know that a home test kit is available from the company, so you can test your own water. The quality of Corona California water should vary from time to time. You may find that it is better than many other places, but the quality changes from area to area, so you may have to do a number of tests to see what the local standard is. But you will be able to compare it to others, and if you live in an area where there are concerns, you need to test your water at least once a year.

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