Table of Contents
Can You Drink Tap Water in O'Fallon?
Yes, O'Fallon's tap water is generally considered safe to drink as O'Fallon 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, O'Fallon's water utility, Ofallon Pws, had 0 violations of the Safe Drinking Water Act. For more details on the violations, please see our violation history section below. This assessment is based on the Ofallon Pws 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.
O'Fallon Tap Water Safe Drinking Water Act Violation History - Prior 10 Years
Below is a ten year history of violations for the water system named Ofallon Pws for O'Fallon in Missouri. For more details please see the "What do these Violations Mean?" section below.
Is there Lead in O'Fallon Water?
Based on the EPA’s ECHO Database, 90% of the samples taken from the O'Fallon water system, Ofallon Pws, between sample start date and sample end date, were at or below, 0.00278 mg/L of lead in O'Fallon water. This is 18.5% of the 0.015 mg/L action level. This means 10% of the samples taken from O'Fallon contained more lead.
While O'Fallon water testing may have found 0.00278 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 O'Fallon 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 - St. Louis Lambert International Airport - near O'Fallon 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 O'Fallon 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.
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.
O'Fallon Water - Frequently Asked Questions
| By Mail: | 100 N MAIN ST - CITY HALL OFALLON, MO, 63366-0000 |
Existing customers can login to their Ofallon Pws account to pay their O'Fallon water bill by clicking here.
If you want to pay your Ofallon Pws 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 O'Fallon 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 O'Fallon 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 O'Fallon means you will often need to put the water in your name with Ofallon Pws. 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 O'Fallon means you will likely need to take your name off of the water bill with Ofallon Pws. 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 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 O'Fallon, measured on a scale from 0% (lowest) to 100% (highest).
Related FAQS
Contaminants
O'Fallon
EWG's drinking water quality report shows results of tests conducted by the water utility and provided to the Environmental Working Group by the Missouri Department of Natural Resources - Public Drinking Water Program, 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: 27000
- Data available: 2012-2017
- Data Source: Purchased surface water
- Total: 21
Contaminants That Exceed Guidelines
- Arsenic
- Bromodichloromethane
- Chlorate
- Chloroform
- Dibromochloromethane
- Dichloroacetic acid
- Radium%2C combined (-226 & -228)
- Total trihalomethanes (TTHMs)
Other Detected Contaminants
- Barium
- Bromochloroacetic acid
- Bromodichloroacetic acid
- Bromoform
- Chromium (hexavalent)
- Chromium (total)
- Fluoride
- Manganese
- Monobromoacetic acid
- Nitrate and nitrite
- Selenium
- Strontium
- Trichloroacetic acid
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
The Department of Natural Resources administered a source water evaluation to figure out the susceptivity of our water source to possible contaminants. This method involved the institution of source water area descriptions for each well or surface water consumption, so a contaminant inventory was performed within those delineated areas to assess potential threats to each source.
Drinking water, including beverages, may reasonably contain a minimum of small amounts of some contaminants. The presence of contaminants doesn’t necessarily indicate that water poses a health risk.
The MDNR regulates the water system and requires us to test our water regularly to verify its safety. Our system has been assigned the amount to trace our test results. Last year, we tested for the diffusion of contaminants. The noticeable effects of these tests are on the following pages of this report. Any violations of state requirements or standards are visiting be further explained later during this report.