Water Quality: Yellowstone, WY
2 water systems • 13,600 people served
Multiple Health ViolationsWater Quality Summary
Yellowstone is served by 2 public water systems with a combined service population of 13,600 people, and has 119 EPA Safe Drinking Water Act violations on record. Critically, 25 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Yellowstone's violation count is 7% below the national average for Wyoming. Contaminants associated with violations include Barium, Bromate, Disinfection Byproducts, E. coli.
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
Probable human carcinogen that increases the risk of kidney and thyroid cancers.
Common source: Ozonation of bromide-containing water; used as flour improver
EPA limit: 0.010 mg/L (10 ppb)
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)
Water Systems Serving Yellowstone
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| YNP-OLD FAITHFUL | WY5680085 | Surface Water | 7,675 | 53 |
| YNP - LAKE VILLAGE | WY5680079 | Groundwater | 5,925 | 66 |
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 Wyoming
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.