Table of Contents
Can You Drink Tap Water in Simi Valley?
Yes, Simi Valley's tap water is generally considered safe to drink as Simi Valley 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, Simi Valley's water utility, Ventura Wwd No. 8 - Simi Valley, 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 Simi Valley was resolved on March 31, 2012. This assessment is based on the Ventura Wwd No. 8 - Simi Valley 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 Simi Valley Tap Water
The most recent publicly available numbers for measured contaminant levels in Simi Valley 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 Simi Valley's water quality reports, or getting your home's tap water tested to see if you should be filtering your water.
Simi Valley Tap Water Safe Drinking Water Act Violation History - Prior 10 Years
Below is a ten year history of violations for the water system named Ventura Wwd No. 8 - Simi Valley for Simi Valley in California. For more details please see the "What do these Violations Mean?" section below.
From Jan. 1, 2012 to March 31, 2012, Simi Valley had 2 non-health based Safe Drinking Water Act violations with the violation category being Monitoring and Reporting, more specifically, the violation code was Monitoring and Reporting (DBP) which falls into the Disinfectants and Disinfection Byproducts Rule rule code group, and the Stage 1 Disinfectants and Disinfection Byproducts Rule rule code family for the following contaminant codes: Total Haloacetic Acids (HAA5), TTHM.
Is there Lead in Simi Valley Water?
Based on the EPA’s ECHO Database, 90% of the samples taken from the Simi Valley water system, Ventura Wwd No. 8 - Simi Valley, between sample start date and sample end date, were at or below, 0.0012 mg/L of lead in Simi Valley water. This is 8.0% of the 0.015 mg/L action level. This means 10% of the samples taken from Simi Valley contained more lead.
While Simi Valley water testing may have found 0.0012 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 Simi Valley 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 - Channel Islands Air National Guard - near Simi Valley 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 Simi Valley 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.
Simi Valley 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 |
|---|---|---|---|---|---|---|---|---|
| 01/01/2012 - 03/31/2012 | Resolved | No | Monitoring and Reporting (MR) | Monitoring and Reporting (DBP) (27) | Stage 1 Disinfectants and Disinfection Byproducts Rule (210) | Total Haloacetic Acids (HAA5) (2456) | Disinfectants and Disinfection Byproducts Rule (200) | Stage 1 Disinfectants and Disinfection Byproducts Rule (210) |
| 01/01/2012 - 03/31/2012 | Resolved | No | Monitoring and Reporting (MR) | Monitoring and Reporting (DBP) (27) | Stage 1 Disinfectants and Disinfection Byproducts Rule (210) | TTHM (2950) | Disinfectants and Disinfection Byproducts Rule (200) | Stage 1 Disinfectants and Disinfection Byproducts Rule (210) |
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
- Maximum contaminant levels (MCLs) - maximum allowed contaminant level was exceeded.
- Maximum residual disinfectant levels (MRDLs) - maximum allowed disinfectant level was exceeded.
- Other violations (Other) - the exact required process to reduce the amounts of contaminants in drinking water was not followed.
Non-Health Based Violations
- 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.
- 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.
- 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.
|
| Health-Based? | Whether the violation is health based. |
| Category Code |
The category of violation that is reported.
|
| 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.
|
| Rule Group Code |
Code that uniquely identifies a rule group.
|
| Rule Family Code |
Code for rule family.
|
For more clarification please visit the EPA's data dictionary.
Simi Valley Water - Frequently Asked Questions
| By Phone: | 805-583-6401 |
| By Email: | jdeakin@simivalley.org |
| By Mail: | 500 West Los Angeles Avenue SIMI VALLEY, CA, 93063 |
Existing customers can login to their Ventura Wwd No. 8 - Simi Valley account to pay their Simi Valley water bill by clicking here.
If you want to pay your Ventura Wwd No. 8 - Simi Valley 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 Simi Valley water bill.
If you don't want to make an account, or can't remember your account, you can make a one-time payment towards your Simi Valley 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.
Moving to a new house or apartment in Simi Valley means you will often need to put the water in your name with Ventura Wwd No. 8 - Simi Valley. 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.
Leaving your house or apartment in Simi Valley means you will likely need to take your name off of the water bill with Ventura Wwd No. 8 - Simi Valley. 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.
The estimated price of bottled water
$2.50 in USD (1.5-liter)
USER SUBMITTED RATINGS
- Drinking Water Pollution and Inaccessibility
- Water Pollution
- Drinking Water Quality and Accessibility
- Water Quality
The above data is comprised of subjective, user submitted opinions about the water quality and pollution in Simi Valley, measured on a scale from 0% (lowest) to 100% (highest).
Related FAQS
Simi Valley 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 Simi Valley's Water. If you would like to see the original version of the report, please click here.
Ventura County Waterworks District No. 8
ANNUAL W A T E R QUALITY REPORT
Published June 2021
This report contains important information about your drinking water. Please contact Melisa Silverheels with the City/District at MSilverheels@simivalley.org or call
Our Mission: Waterworks District No. 8 is committed to providing you a reliable supply of safe,
Este informe contiene información importante sobre su agua potable. Por favor contacte a Maria Godinez con City/District al
MGodinez@simivalley.org o
para asistencia en español.
Our Commitment To You
The City of Simi Valley/Waterworks District No. 8 (City/District) is committed to providing you a reliable supply of
The City/District distributes 14 million gallons of water each day to more than 26,000 homes and businesses within the community. This report is a snapshot of last year’s water quality. Included are details about where your water comes from, what it contains, and how it compares to State standards. The City/District is committed to transparency, sharing pertinent information about the potable water supplied to our customers.
The City/District works diligently with our neighbors, our partners and suppliers to continually improve the quality of the water supply, the protection of our water sources, the reliability of supply and the integrity of our storage and distribution system.
The City/District supplies water to approximately 65% of Simi Valley residences, businesses, and institutions, and Golden State Water Company supplies the remainder. Your water bill is a sure way to determine which water purveyor serves you, or you may call us at
Our Water Resources
The primary supply for the City/District is the State Water Project, imported from Northern California. The State Water Project water is treated, filtered and disinfected at Metropolitan Water District’s (Metropolitan) Joseph Jensen Filtration Plant in Granada Hills. The treated water is conveyed by pipeline to Calleguas Municipal Water District (Calleguas). Calleguas is the main supplier of water to the City/District and Golden State Water Company, Simi Valley’s water purveyors.
In addition, Calleguas uses the Lake Bard Reservoir to store imported water from Metropolitan. The water treated at the Lake Bard Water Filtration Facility is reserved for emergencies, or planned facility outages.
The other City/District source of drinking water is the Gillibrand Groundwater Basin located north of Simi Valley, accounting for 0.35% of the total water delivered within the City/District service area. Groundwater from this basin is pumped to the Tapo Canyon Water Treatment Plant for treatment and disinfection, before delivery to the distribution system.
Public Participation
The City’s/District’s drinking water system is managed as an enterprise by the Board of Directors of Waterworks District No. 8, whose five Board Members are also the City Council of the City of Simi Valley. Scheduled items affecting the Waterworks customers are posted on the City Council agendas that are published preceding each meeting. Any member of the public may provide statements at the Council meeting.
Metropolitan has completed a source water assessment of both the State Water Project and Colorado River supply. The State Water Project source is considered to be vulnerable to urban and storm water runoff, wildlife, agriculture, recreation, and wastewater. The Colorado River source is considered to be vulnerable to contamination from recreation, urban and stormwater runoff, increasing urbanization in the watershed, and wastewater. A copy of this assessment can be obtained by contacting Metropolitan at (213)
The City Council meets routinely, twice per month, on Monday evenings at 6:30 PM in the City Council Chambers at
City Hall, 2929 Tapo Canyon Road.
For information about City Council meeting schedules, please visit www.simivalley.org/ citycouncilmeetings or call the City Clerk’s office at
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Some people may be more vulnerable to |
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contaminants in drinking water than the |
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general population. |
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persons, for example, those with cancer who |
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are undergoing chemotherapy, persons |
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who have undergone organ transplants, |
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people with HIV/AIDS or other immune |
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system disorders, some elderly, or infants; |
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can be particularly at risk from infections. |
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These people should seek advice about their |
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drinking water from their health care |
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providers. The U.S. EPA and the Centers for |
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Disease Control (CDC) provide guidelines on |
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the appropriate means to lessen the risk from |
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infection by Cryptosporidium and other |
Public Health |
microbial contaminants. These guidelines |
are available from the Safe Drinking Water |
Hotline at
All drinking water, including bottled water, contains at least small amounts of some contaminants. The presence of contaminants does not necessarily indicate that the water poses a health risk. More information about contaminants and potential health risks may be obtained by calling the Safe
Drinking Water Hotline at
The sources of drinking water (both tap water 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
Metropolitan initiated a Fluoride Optimization Program in November of 2007 based upon the overwhelming evidence that water fluoridation is an aid to public health, as it helps prevent dental decay. Metropolitan adjusts the natural fluoride level in its water, ranging from 0.1 to
0.4 parts per million (ppm), to the optimal level of 0.7 ppm for dental health. If you or family members are taking fluoride supplements, please consult with your dentist or dental healthcare provider for further advice.
Inorganic contaminants
such as salts and metals that can be naturally occurring or result from urban storm water
Organic chemical contaminants
including synthetic and volatile organic chemicals, which are
Microbial contaminants
such as viruses and bacteria that may come from sewage treatment plants, septic systems, agricultural livestock operations and wildlife;
Radioactive contaminants
can be naturally occurring or the result of oil and gas production and mining activities;
Pesticides and Herbicides
may come from a variety of sources such as agriculture, urban storm water
Radon is a radioactive gas that you cannot see, taste, or smell. It is found throughout the United States. Radon can move up through the ground and into a home through cracks and holes in the foundation.
Radon can build up to high levels in all types of homes. Radon can also get into indoor air when released from tap water from showering, washing dishes, and other household activities. Compared to radon entering the home through soil, radon entering the home through tap water will in most cases be a small source of radon in indoor air. Radon is a known human carcinogen. Breathing air containing radon can lead to lung cancer. Drinking water containing radon may also cause increased risk of stomach cancer. If you are concerned about radon in your home, test the air in your home. Testing is inexpensive and easy. You should pursue radon removal for your home if the level of radon in your air is 4 picocuries per liter of air (pCi/L) or higher. There are simple ways to fix a radon problem that are not too costly. For additional information, call your State radon program
In order to ensure that tap water is safe to drink, the U.S. EPA and the State Water Board prescribe regulations that limit the amount of certain contaminants in water provided by public water systems. The State Water Board’s regulations also establish limits from contaminants in bottled water that provide the same protection for public health.
The City/District has also conducted a source water assessment of its groundwater supplies in 2009 and 2011, and found the sources were most vulnerable to neighboring agricultural operations, gravel mining, and nursery operations; however, no contamination from these sources was detected.
Constituents Tested for and Not Detected
In addition to the information provided in the Water Quality Data tables, the City/District also monitored for, but did not detect, many other contaminants during 2020. Some of those contaminants were:
Antimony |
Herbicides |
Silver |
Asbestos |
Mercury |
|
Beryllium |
Nitrite |
Thallium |
Cadmium |
Perchlorate |
Total Chromium |
Chemicals (VOCs) |
Pesticides |
Tritium |
Chromium 6 |
Radium 226 |
Vanadium |
Cyanide |
Radium 228 |
Volatile Organic |
Foaming Agents |
Selenium |
Zinc |
Gross Beta |
|
|
Water Quality Data
The City/District suppliers, and the City/District, must sample the water and conduct laboratory testing for various minerals and constituents to monitor water quality.
The Tables on the next page list the drinking water contaminants that were detected in City/District drinking water during 2020. The presence of contaminants in the water does not necessarily constitute a health risk. The data presented in the Tables are from testing performed between January 1 and December 31, 2020, unless otherwise noted. Applicable Abbreviations, Definitions and Notes are identified at the conclusion of the Tables.
Lead in drinking water most commonly is the result of using lead components in water service lines to home and in- home plumbing systems. If present, elevated levels of lead can cause serious health problems, especially for pregnant women and young children. Lead was not detected in the City/District water supply. The City/District can only control the piping to the point of a meter serving a property; the plumbing system on the home’s side of the meter is controlled by the property owner. You can minimize the potential for lead exposure by flushing your tap before using the water for drinking or cooking when your water has been sitting for several hours. If you are concerned about lead in your water, you may 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 www.epa.gov/safewater/lead The State of California now requires that all public schools built before 2010 test for lead in their drinking water by July 1, 2019. The District completed the required testing in 2017, and none of the sixteen schools within the City/District service area had test results over the maximum contaminant level of 15 ppb.
PRIMARY DRINKING WATER STANDARDS (PDWS) - MANDATORY
|
Parameter |
|
Units |
State |
PHG |
DLR |
Range |
Tapo Cyn |
Metropolitan |
Calleguas |
Potential Major Sources if |
|
|
MCL |
(MCLG) |
Average |
Plant (g) |
Jensen Plant |
Lake Bard Plant |
Detected in Drinking Water |
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Percent of Drinking Water Supply |
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<1% |
97% |
3% |
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CLARITY |
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Turbidity
NTU (a)
Highest Single Value |
<0.1 |
0.04 |
0.06 |
TT = % of samples <0.3 NTU |
100% |
100% |
100% |
Soil runoff
MICROBIOLOGICAL
Total Coliform Bacteria
(b)
> 1
(0)
-
Range |
ND |
ND |
ND - 1 |
Average |
ND |
ND |
ND |
Naturally present in the environment
INORGANIC CHEMICALS
|
Aluminum |
ppb |
1000 |
600 |
|
50 |
Range |
|
ND |
ND - 220 |
ND |
Erosion of natural deposits; residual |
|
|
Average |
|
ND |
116 |
ND |
from water treatment |
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Arsenic |
ppb |
10 |
0.004 |
|
2 |
Range |
|
ND |
ND |
ND - 2 |
Erosion of natural deposits; runoff |
|
|
Average |
|
ND |
ND |
ND |
from orchards |
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ppm |
2.0 |
1 |
|
0.1 |
Range |
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N/A |
0.6 - 0.9 |
Water additive that promotes strong |
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(c) |
|
Highest RAA |
|
<0.1 |
0.7 |
teeth |
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Nitrate (as N) |
ppm |
10 |
10 |
|
0.4 |
Range |
|
N/A |
N/A |
N/A |
Erosion of natural deposits; Fertilizer |
|
|
Average |
|
0.56 |
N/A |
N/A |
runoff/leaching |
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RADIOLOGICALS |
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Gross Alpha |
pCi/L |
15 |
(0) |
|
3.0 |
Range |
|
N/A |
ND |
4.0 - 5.2 |
Erosion of natural deposits |
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|
Average |
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4.08 |
ND |
4.6 |
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Uranium |
pCi/L |
20 |
0.43 |
|
1.0 |
Range |
|
N/A |
ND - 3.0 |
1.1 - 2.2 |
Erosion of natural deposits |
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|
Average |
|
12 |
ND |
1.7 |
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DISINFECTION |
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Bromate (d) |
ppb |
10 |
0.1 |
|
1.0 |
Range |
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ND |
1.4 - 6.0 |
ND |
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Average |
|
ND |
4.4 |
ND |
disinfection |
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Total Chlorine Residual |
ppm |
[4.0] |
[4] |
|
NA |
Range |
|
1.3 - 2.6 |
1.7 - 2.6 |
Drinking water disinfectant added |
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MRDLG |
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Highest RAA |
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2.2 |
2.3 |
for treatment |
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Haloacetic Acids (e) |
ppb |
60 |
NA |
|
1.0 |
Range |
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N/A |
ND - 19 |
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Highest LRAA |
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N/A |
7.8 |
disinfection |
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Total Trihalomethane (e) |
ppb |
80 |
NA |
|
1.0 |
Range |
|
N/A |
11 - 22 |
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|
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Highest LRAA |
|
5.1 |
16.3 |
chlorination |
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SECONDARY DRINKING WATER STANDARDS (SDWS) - AESTHETIC |
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|
Aluminum (i) |
ppb |
200 |
N/A |
|
50 |
Range |
|
ND |
ND - 220 |
ND |
Erosion of natural deposits; residual |
|
|
Average |
|
ND |
116 |
ND |
from water treatment |
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Chloride |
ppm |
500 |
N/A |
|
- |
Range |
|
N/A |
51 - 54 |
96 - 100 |
Runoff/leaching from natural |
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|
Average |
|
20 |
52 |
98 |
deposits; seawater influence |
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Color |
Units |
15 |
N/A |
|
- |
Range |
|
ND |
1 - 3 |
ND |
Naturally occurring organic |
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|
Average |
|
ND |
2 |
ND |
materials |
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Odor Threshold |
TON |
3 |
N/A |
|
1 |
Range |
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N/A |
2 |
ND |
Naturally occurring organic |
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|
Average |
|
1 |
2 |
ND |
materials |
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Specific Conductance |
uS/cm |
1600 |
N/A |
|
- |
Range |
|
451 - 468 |
729 - 740 |
Substances that form ions when in |
|
|
|
Average |
|
538 |
460 |
735 |
water; seawater influence |
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Sulfate |
ppm |
500 |
N/A |
|
0.5 |
Range |
|
N/A |
53 - 56 |
76.9 - 93.3 |
Runoff/leaching from wastes |
|
|
Average |
|
120 |
54 |
85.1 |
natural deposits; industrial wastes |
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|
Total Dissolved Solids |
ppm |
1000 |
N/A |
|
- |
Range |
|
160 - 490 |
255 - 264 |
360 - 400 |
Runoff/leaching from natural |
|
|
Average |
|
328 |
260 |
380 |
deposits |
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ADDITIONAL PARAMETERS (UNREGULATED) |
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|
Alkalinity |
ppm |
NS |
N/A |
|
- |
Range |
|
79 - 86 |
110 |
|
|
|
|
Average |
|
130 |
82 |
110 |
|
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Boron |
ppm |
NL=1 |
N/A |
|
0.1 |
Range |
|
N/A |
0.2 |
0.2 |
|
|
|
Average |
|
150 |
0.2 |
0.2 |
|
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|
Calcium |
ppm |
NS |
N/A |
|
- |
Range |
|
25 - 27 |
34 - 35 |
|
|
|
|
Average |
|
56 |
26 |
35 |
|
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|
Chlorate |
ppb |
NL=800 |
N/A |
|
- |
Range |
|
N/A |
27 |
ND |
|
|
|
Average |
|
120 |
27 |
ND |
|
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|
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|
AI |
NS |
N/A |
|
- |
Range |
|
N/A |
12.1 - 12.2 |
12.3 |
Balance of hydrogen, carbon, |
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Corrosivity (AI) (f) |
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oxygen in water; affected by |
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Average |
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12.1 |
12.1 |
12.3 |
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temperature. |
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Hardness (Total Hardness) |
ppm |
NS |
N/A |
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- |
Range |
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107 - 110 |
153 - 155 |
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Average |
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188 |
108 |
154 |
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Magnesium |
ppm |
NS |
N/A |
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- |
Range |
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11 - 12 |
16 - 17 |
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Average |
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12 |
12 |
17 |
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ppt |
NL=10 |
N/A |
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- |
Range |
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N/A |
2 |
ND |
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(NDMA) |
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Average |
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<0.002 |
2 |
ND |
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Perfluorohexanoic Acid |
ppt |
NS |
N/A |
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Range |
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NA |
2.5 |
(h) |
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(PFHxA) (h) |
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Average |
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NA |
2.5 |
(h) |
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pH |
pH Units |
NS |
N/A |
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- |
Range |
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8.4 |
8.3 |
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Average |
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8 |
8.4 |
8.3 |
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Potassium |
ppm |
NS |
N/A |
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- |
Range |
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N/A |
2.5 - 2.6 |
4 |
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Average |
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1.3 |
2.6 |
4 |
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Sodium |
ppm |
NS |
N/A |
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- |
Range |
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N/A |
46 - 48 |
83 - 85 |
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Average |
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39 |
47 |
84 |
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Total Organic Carbon |
ppm |
NS |
N/A |
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0.3 |
Range |
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N/A |
1.8 - 2.3 |
1.3 - 1.6 |
Various natural and manmade |
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Average |
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0.74 |
2.2 |
1.5 |
sources |
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Testing from the Tapo Canyon Treatment Plant was conducted by the District.
For more information on water sampling conducted by MWD and Calleguas, please email or call the contacts provided at the end of the report.
VENTURA COUNTY WATERWORKS DISTRICT NO. 8 (WWD8) - DISTRIBUTION WATER QUALITY
MICROBIOLOGICAL
|
Microbiological |
Units |
State |
PHG |
Highest % of monthly |
No. of site |
Potential Major Sources if Detected in Drinking Water |
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Contaminants Samples |
MCL |
(MCLG) |
sample detection |
exceeding AL |
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Total Coliform Bacteria |
(b) |
> 1 |
0 |
0 |
0 |
Naturally present in the environment |
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Fecal Coliform Bacteria |
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0 |
0 |
0 |
0 |
Human and animal fecal waste |
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SAMPLING RESULTS SHOWING THE DETECTION OF LEAD AND COPPER, TESTED EVERY THREE YEARS
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Constituent |
Units |
State |
PHG |
DLR |
Sample |
No of Samples |
90th |
No of Site |
Potential Major Sources if |
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MCL |
(MCLG) |
Date |
Collected |
Percentile |
exceeding AL |
Detected in Drinking Water |
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Lead |
ppm |
AL=15 |
0.2 |
5 |
2019 |
30 |
0.0019 |
0 |
Erosion of natural deposits; |
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internal corrosion of house |
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Copper |
ppm |
AL=1.3 |
0.3 |
0.05 |
2019 |
30 |
0.18 |
0 |
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pipes |
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TESTING RESULTS FOR LEAD IN SCHOOLS
Lead in Schools
ppb
AL=15
0.2
5
2017
58
N/A
0
Sixteen Schools were tested All results were below the MCL of 15 ppb
DISINFECTION
|
Parameter |
Units |
State |
PHG |
DLR |
Range |
Tapo Cyn Plant |
WWD8 |
Potential Major Sources if Detected in Drinking |
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MCL |
(MCLG) |
Average |
(g) |
System Wide |
Water |
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[4.0] |
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Range |
1.3 - 2.6 |
0.4 - 2.9 |
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Total Chlorine Residual |
ppm |
[4] |
NA |
Highest |
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Drinking water disinfectant added for treatment |
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MRDLG |
2.2 |
2.2 |
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RAA |
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Range |
N/A |
2.0 - 6.1 |
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Haloacetic Acids (e) |
ppb |
60 |
NA |
1.0 |
Highest |
N/A |
3.3 |
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LRAA |
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Range |
N/A |
12.0 - 37.0 |
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Total Trihalomethane (e) |
ppb |
80 |
NA |
1.0 |
Highest |
5.1 |
16.2 |
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LRAA |
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ABBREVIATIONS, DEFINITIONS AND NOTES
AF = Acre Feet |
NS = No Standard |
AI = Aggresive Index (Langlier) |
NTU = Nephelometric Turbidity units |
AL = Regulatory Action Level |
pCi/L = PicoCuries per Liter |
CFU/mL = |
PDWS = Primary Drinking Water Standard |
DLR = Detection Limits for Purposes of Reporting |
PHG = Public Health Goal |
LRAA = Locational Running Annual Average |
PHFxA = Perfluorohexanoic Acid |
MCL = Maximum Contaminant Level |
ppb = parts per billion, or micrograms per liter (μg/L) |
MCLG = Maximum Contaminant Level Goal |
ppm = parts per million, or milligrams per liter (mg/L) |
MRDL = Maximum Residual Disinfectant Level |
ppt = parts per trillion, or nanograms per liter (ng/L) |
MRDLG = Maximum Residual Disinfectant Level Goal |
RAA = Running Annual Average |
MTBE = Methyl Tertiary Butyl Ether |
SDWS = Secondary Drinking Water Standard |
N/A = Not Applicable |
State Water Board = State Water Resources Control Board |
N/R = Not Required |
TON = Threshold Odor Number |
NA = Not Analyzed |
TT = Treatment Technique |
ND = None Detected |
μS/cm = microSiemen per centimeter |
NL = Notification Level |
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Range is the lowest and highest result from a sampled parameter.
Average is the
- The turbidity level of filtered water shall be less than or equal to 0.3 NTU in 95% of measurements taken each month and shall not exceed 1.0 NTU at any time. Turbidity is a measure of the cloudiness of the water. It is monitored because it is a good indicator of the effectiveness of the filtration system.
-
Coliforms are bacteria that are naturally present in the environment and are used as an indicator that other,
potentially-harmful, bacteria may be present. No more than 1 monthly sample may be total coliform positive. This MCL was not violated in 2020. -
The Metropolitan Water District (MWD) treats their water by adding fluoride to the naturally occurring level in order to help prevent dental caries in consumers. The fluoride levels in the treated water are maintained within a range of 0.6 – 1.2 ppm, as required by State Water Resources Control Board (SWRCB),
Division of Drinking Water (DDW). - Compliance for treatment plants that use ozone is based on a running annual average of monthly samples.
- Compliance is based on a locational running average of quarterly distribution system samples.
-
AI measures the aggressiveness of water transported through pipes. Water with AI <10.0 is highly aggressive and would be very corrosive to almost all materials found in a typical water system. AI 12.0 indicates
non-aggressive water. AI between 10.0 and 11.9 indicates moderately aggressive water. - The Tapo Canyon Water Treatment Plant produced 69.5 AF in 2020.
- Calleguas did not sample for Perfluoroalkyl and Polyfluoroalkyl Substance in 2020.
- Aluminum has both primary and secondary standards. Compliance with the MCL is based on a running annual average. No secondary MCL exceedance occurred in the Jensen or Tapo Canyon treatment plant effluent.
Making Conservation A Way of Life
Since nearly 70% of the water used in Simi Valley is for irrigation, the most significant savings can be realized with investments in sustainable landscape and high efficiency irrigation. Simi Valley water customers are eligible for a turf replacement rebate of $2.00 per square foot, by visiting www.bewaterwise.com. Also, see www.venturacountygardening.com for sustainable landscape designs, galleries of colorful,
For More Information on Water Quality
City of Simi Valley/Waterworks District No. 8
2929 Tapo Canyon Road
Simi Valley, CA 93063
-
583-6469 msilverheels@simivalley.org
Calleguas Municipal Water District
2100 Olsen Road
Thousand Oaks, CA 91360
-
526-9323 www.calleguas.com
Metropolitan Water District of Southern California
Public Affairs
P.O. Box 54153
Los Angeles, CA 90054
- CALL MWD www.mwdh2o.com
State Water Resources Control Board
Division of Drinking Water
601 North 7th Street Sacramento, CA 94234 www.waterboards.ca.gov/drinking_water/programs
Protection of drinking water is everyone’s responsibility. We invite you to join our efforts to protect our surface waters in Ventura County, or watersheds by visiting www.cleanwatershed.org
We must continue using water as efficiently as possible as it is a precious resource. Water Year 2020 was considered to be a dry year. Much of Northern California experienced dry, winter months. Precipitation received in the Southern California region due to late season storms contributed to a wet spring, but insufficient to restore Northern California to average conditions and to replenish the Colorado River Basin.
With the changing climate, we will inevitably experience longer and more intense droughts. In addition, State law requires all of us to use water efficiently. Efficient water use is the most
Contaminants
Ventura Waterworks District No. 8 - Simi Valley
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: 86000
- Data available: 2012-2017
- Data Source: Purchased surface water
- Total: 23
Contaminants That Exceed Guidelines
- Arsenic
- Bromodichloromethane
- Bromoform
- Chloroform
- Chromium (hexavalent)
- Dibromochloromethane
- Dichloroacetic acid
- Nitrate
- Nitrate and nitrite
- Total trihalomethanes (TTHMs)
- Uranium
Other Detected Contaminants
- Chlorate
- Dibromoacetic acid
- Fluoride
- Haloacetic acids (HAA5)
- Manganese
- Molybdenum
- Radium%2C combined (-226 & -228)
- Selenium
- Strontium
- Strontium-90
- Trichloroacetic acid
- 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
Sources Cited
Additional Resources
If you have been reading about bottled water and how wonderful it is, you might have heard of the city of Simi Valley in California. It is actually a place with a lot of distinction. It is famous for its tap water which has always won accolades from people across the world. This is why a lot of business establishments there serve quality bottled water to their customers. But our tap water and bottled water really the same? To find out, here is a look at both types of water.
Tap Water: As we all know, tap water is clean and safe to drink. You can safely bring it anywhere without worrying about having contaminated water. There are no drugs or chemicals used in most tap water, so that is one good thing about this type of water. Of course, this is only the case if you are using an "out of doors" tap - meaning a stream, a well, or a lake. If you have a well or a creek, you could end up with polluted water if you aren''t careful.
If you do end up getting co