Water Quality: Eureka, MT
4 water systems • 2,550 people served
Multiple Health ViolationsWater Quality Summary
Eureka is served by 4 public water systems with a combined service population of 2,550 people, and has 72 EPA Safe Drinking Water Act violations on record. Critically, 4 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Eureka's violation count is 31% below the national average for Montana. Contaminants associated with violations include Disinfection Byproducts, E. coli, Fecal Coliform.
Contaminants Found
Broad category of chemicals formed during disinfection, associated with increased cancer risk and adverse reproductive effects.
Common source: Reaction of disinfectants (chlorine, ozone, chloramines) with organic matter
Causes gastrointestinal illness; certain strains (e.g., O157:H7) can cause severe kidney failure and death.
Common source: Fecal contamination from humans or animals entering the water supply
EPA limit: Zero (no E. coli permitted in drinking water)
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)
Water Systems Serving Eureka
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| EUREKA TOWN OF | MT0000210 | Surface Water | 1,995 | 3 |
| INDIAN SPRINGS RANCH SUB | MT0004611 | Groundwater | 455 | 20 |
| CARPENTER LAKE HOA | MT0003694 | Groundwater | 65 | 10 |
| CREEKSIDE MOTEL RV AND TRLR PK | MT0000530 | Groundwater | 35 | 39 |
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 Montana
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.