Water Quality: Chesterfield, MO
4 water systems • 1,113,079 people served
Multiple Health ViolationsWater Quality Summary
Chesterfield is served by 4 public water systems with a combined service population of 1,113,079 people, and has 145 EPA Safe Drinking Water Act violations on record. Critically, 36 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Chesterfield's violation count is 281% above the national average for Missouri. Contaminants associated with violations include Chlorine, Chlorine Dioxide, TTHM, Total Haloacetic Acids (HAA5).
Contaminants Found
Eye and nose irritation at high levels; long-term exposure above the MCL may cause liver and kidney damage.
Common source: Water treatment disinfectant added to kill harmful microorganisms
EPA limit: 4.0 mg/L (MRDL — Maximum Residual Disinfectant Level)
Can cause anemia in infants and young children; may cause nervous system effects at high levels.
Common source: Water treatment disinfectant used to control taste, odor, and microorganisms
EPA limit: 0.8 mg/L
Total trihalomethanes are linked to increased risk of bladder cancer and adverse reproductive outcomes.
Common source: Reaction of chlorine disinfectants with naturally occurring organic matter in water
EPA limit: 0.080 mg/L (80 ppb)
Haloacetic acids are associated with increased cancer risk and potential reproductive and developmental effects.
Common source: Reaction of chlorine disinfectants with organic matter in treated water
EPA limit: 0.060 mg/L (60 ppb)
Water Systems Serving Chesterfield
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| MO AMERICAN ST LOUIS ST CHARLES COUNTIES | MO6010716 | Surface Water | 1,111,000 | 0 |
| MO AMERICAN IRONTON | MO4010402 | Surface Water | 1,460 | 30 |
| MO AMERICAN PEVELY FARMS | MO6031185 | Groundwater | 343 | 4 |
| MO AMERICAN ROGUE CREEK UTILITIES | MO4036318 | Groundwater | 276 | 111 |
Concerned About Your Water?
A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.
Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.
Other Cities in Missouri
Data Sources
Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.