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Review government records associated with Dardenne Prairie, Missouri.
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Check your water bill for your utility name and confirm the reporting year. See EPA’s guide to finding your annual water quality report.
Public water-system records for Dardenne Prairie, MO from EPA SDWIS.
Mo American St Louis St Charles Counties
PFAS detected below the official threshold used by this report.
Reviewed: active/open records as of Q1 2026
City-area ZIP code · Serves 1,111,000 people
Wentzville Pws
No active drinking-water issues detected in EPA SDWIS.
Reviewed: active/open records as of Q1 2026
City-area ZIP code · Serves 41,784 people
Data from EPA SDWIS
PFAS screening separates EPA UCMR5 drinking-water monitoring from nearby DoD PFAS investigation-site records; EPA samples shown are from Jun 2024.
Drinking Water PFAS Monitoring
EPA UCMR5 samples public water systems. These results are separate from nearby PFAS cleanup or investigation-site records.
PFAS detections below EPA limits.
Nearby PFAS Investigation Sites
DoD records are nearby site investigations, not Dardenne Prairie drinking-water detections. Record names come from the source database and can be broad.
No DoD PFAS investigation records shown for this report.
EPA ATTAINS records identify assessed water bodies that do not meet water-quality standards for designated uses.
Middle Dardenne Creek
Reported: Nov 2026
Health-relevant causes: Mercury, Pathogens
Affected uses: Ecological, Fishconsumption, Other, Recreation
Data from EPA ATTAINS
NPDES permits regulate pollutant discharges into U.S. waterways. Facilities must report compliance quarterly.
No NPDES-permitted facility records with current violation flags surfaced for this city report.
Reviewed: active/open records as of Q4 2025
Data from EPA ECHO
To investigate water contamination, check the sampling locations, dates and results below. For tap water records, see Drinking water quality above.
Reviewed: source records as of 2026
Review historical EPA air pollution records, including monitoring and facility emissions where available. For current conditions, check local air quality on AirNow.
St. Charles County
Assessment year: 2020
According to EPA, a cancer risk of 40-in-1-million means that for every 1 million people continuously exposed to these air toxics over a 70-year lifetime, an estimated 40 may develop cancer from that exposure. This is in addition to cancer risk from all other causes.
Top modeled source groups
Data from EPA AirToxScreen
EPA designations apply to a specific pollutant and federal air quality standard (NAAQS). EPA can issue a clean-data determination while a formal designation remains in effect.
St. Louis: Ozone
NonattainmentSerious8-Hour Ozone (2015 Standard)
Health effects (EPA): Respiratory inflammation, aggravation of asthma, reduced lung function (EPA)
Maintenance areas
Previously nonattainment; currently meeting the standard and monitored under an EPA maintenance plan.
St. Louis-St. Charles-Farmington
Ozone · 8-Hour Ozone (2008 Standard)
Classification: Marginal
Original designation: Jul 2012
Current design value: 0.07 ppm (2023-2025)
1997 Primary Annual PM2.5 Designations
St. Louis
EPA revoked the 1997 primary annual PM2.5 standard in this redesignated area.
Original designation: Apr 2005
Open data source: EPA final primary annual revocation ruleOpen data source: EPA designation statusData from EPA Green Book
EPA annual monitor summaries describe past measurements. For current air quality, see AirNow.
29-183-9004 — Augusta, Missouri
Annual mean: 3.3 Parts per billion
Observation year: 2025
Foley West
Annual mean: 0.044 Parts per million
EPA primary exceedance count: 3 (Ozone 8-hour 2015)
Observation year: 2025
Forest Park — St. Louis, Missouri
Annual mean: 0.3 Parts per million
Observation year: 2025
Data from EPA AQS
Reviewed: source records as of Q4 2025
Reviewed: source query run Nov 2026
Reviewed: source query run Nov 2026
No release reports shown in this group.
Reviewed: active/open records as of 2018
Data from EPA UST Finder
No MSHA mine or extraction site records shown for this report.
St. Charles County, MO
EPA Radon Zone Map (June 2024 release)
St. Charles County is EPA Radon Zone 2 (moderate potential). EPA defines Zone 2 counties as having predicted average indoor screening levels between 2 pCi/L and 4 pCi/L.
Radon levels can vary from home to home, so EPA recommends testing the property to know its indoor level.
FEMA flood zones describe mapped flood hazards. Look up a specific address with FEMA.
Minimal flood hazard — outside the 1% and 0.2% annual chance floodplains.
Results use an earlier stored RMP inventory. Current EPA ECHO location coverage is unverified.
No EPA ECHO RMP facility records with a usable location matched this city report.
PHMSA tracks incidents involving natural gas and hazardous liquid pipelines. Incidents include leaks, ruptures, and explosions.
Recent Incidents (last 5 years)
SPIRE MISSOURI INC. EAST
Incident date: Mar 1, 2022
Data from PHMSA
Health outcomes from County Health Rankings. Values shown alongside state and national averages.
St. Charles County, MissouriPop. 413,803
County Health Rankings edition: 2024
Premature Death
Poor or Fair Health
Poor Physical Health Days
Poor Mental Health Days
Adult Smoking
Adult Obesity
Air Pollution - Particulate Matter
Drinking water violation indicator
Diabetes Prevalence
Life Expectancy
| Indicator | County | State | National |
|---|---|---|---|
| Premature Death | 6,115 | 9,478 | 7,972 |
| Poor or Fair Health | 12.5% | 16.4% | 14.2% |
| Poor Physical Health Days | 3.3 | 3.7 | 3.3 |
| Poor Mental Health Days | 5.0 | 5.2 | 4.8 |
| Adult Smoking | 13.4% | 18.1% | 15.0% |
| Adult Obesity | 37.0% | 37.6% | 34.0% |
| Air Pollution - Particulate Matter | 9.6 | 7.6 | 7.3 |
| Drinking water violation indicator | No | N/A | N/A |
| Diabetes Prevalence | 7.9% | 9.9% | 9.6% |
| Life Expectancy | 79.3 | 75.8 | 77.6 |
EPA testing found PFAS in water samples from Mo American St Louis St Charles Counties. Results dated Jun 17, 2024 include PFBA at 0.005 to 0.0051 micrograms per liter.
Check with the utility that serves your address for its testing results.
The EPA drinking water records available here list no violations for Mo American St Louis St Charles Counties.
EPA drinking water records on this page list 1 violation for Wentzville Pws.
Check your water bill to identify the utility serving your address. Ask that utility about current drinking water advisories.
Nearby EPA monitoring stations provide annual air quality measurements for Dardenne Prairie.
The monitoring station at 29-183-9004, Augusta, Missouri recorded an annual average of 3.3 Parts per billion for sulfur dioxide in 2025.
The monitoring station at Foley West recorded an annual average of 0.044 Parts per million for ozone in 2025.
The monitoring station at Forest Park, St. Louis, Missouri recorded an annual average of 0.3 Parts per million for carbon monoxide in 2025.
The radon data for Dardenne Prairie covers St. Charles County. EPA places this area in Zone 2, with a predicted average indoor radon screening level of 2 to 4 picocuries per liter.
No Superfund or brownfield sites were returned for this city report.
The county data for Dardenne Prairie reports a life expectancy of 79.3 years in St. Charles County, Missouri.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.
The county data for Dardenne Prairie reports 6,115 years of life lost to deaths before age 75 per 100,000 residents in St. Charles County, Missouri. This measure adds up the years lost to early deaths and adjusts for differences in population age.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.
The county data for Dardenne Prairie lists fine-particle pollution (PM2.5) at 9.6 micrograms per cubic meter in St. Charles County, Missouri.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.
Federal pipeline records list an incident involving Spire Missouri Inc. East near Dardenne Prairie on Mar 1, 2022. The reported release was natural gas.