Water Quality: St Maries, ID
5 water systems • 4,561 people served
Multiple Health ViolationsWater Quality Summary
St Maries is served by 5 public water systems with a combined service population of 4,561 people, and has 24 EPA Safe Drinking Water Act violations on record. Critically, 13 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. St Maries's violation count is 82% below the national average for Idaho. Contaminants associated with violations include Barium, Fecal Coliform, Gross Alpha, HAA5, Haloacetic Acids.
Contaminants Found
Increases blood pressure and causes cardiovascular effects with long-term exposure.
Common source: Natural rock deposits, oil drilling operations, coal power plant waste
EPA limit: 2 mg/L
Indicates direct fecal contamination; associated with diarrhea, cramps, nausea, and potential severe illness.
Common source: Human and animal fecal waste
EPA limit: Zero tolerance (any positive triggers violations)
Alpha-emitting radioactive particles increase cancer risk, particularly from bone and other internal cancers.
Common source: Natural uranium and radium in geological formations
EPA limit: 15 pCi/L (excluding radon and uranium)
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)
Linked to increased cancer risk and potential reproductive and developmental effects with long-term exposure.
Common source: Reaction of chlorine disinfectants with organic matter in treated water
EPA limit: 0.060 mg/L (60 ppb)
Water Systems Serving St Maries
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| ST MARIES CITY OF | ID1050024 | Surface Water | 4,173 | 1 |
| COTTONWOOD POINT WATER ASSN | ID1050008 | Groundwater | 151 | 0 |
| EMIDA WATER AND SEWER ASSOCIATION | ID1050009 | Groundwater | 95 | 7 |
| EVERGREEN TERRACE WATER ASSOCIATION | ID1050010 | Groundwater | 85 | 3 |
| CASSANDRA HILLS OWNERS ASSN | ID1050004 | Groundwater | 57 | 13 |
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 Idaho
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.