Water Quality: Cheyenne, WY
14 water systems • 77,707 people served
Multiple Health ViolationsWater Quality Summary
Cheyenne is served by 14 public water systems with a combined service population of 77,707 people, and has 135 EPA Safe Drinking Water Act violations on record. Critically, 11 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Cheyenne's violation count is 6% above the national average for Wyoming. Contaminants associated with violations include Chlorine Dioxide, E. coli, Nitrate-Nitrite.
Contaminants Found
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
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)
Causes methemoglobinemia in infants and may pose cancer risks with long-term exposure.
Common source: Fertilizer runoff, septic systems, animal feedlots, natural deposits
EPA limit: 10 mg/L (as nitrogen)
Water Systems Serving Cheyenne
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| CHEYENNE BOARD OF PUBLIC UTILITIES | WY5600011 | Surface Water | 64,165 | 1 |
| SOUTH CHEYENNE WATER & SEWER DISTRICT | WY5600239 | Surface Water | 10,000 | 3 |
| WINCHESTER HILLS | WY5600779 | Groundwater | 1,078 | 3 |
| WEST WINDS | WY5601619 | Surface Water | 663 | 3 |
| BIG COUNTRY ESTATES | WY5601271 | Surface Water | 615 | 1 |
| CIMMARON VILLAGE | WY5601315 | Surface Water | 327 | 0 |
| ORCHARD VALLEY WATER COMPANY | WY5600012 | Groundwater | 260 | 2 |
| ENGLEWOOD VILLAGE MHP | WY5601304 | Surface Water | 152 | 1 |
| HIGHLAND RANCH ESTATES | WY5600260 | Groundwater | 128 | 17 |
| HIDE-A-WAY MOBILE VILLAGE | WY5600263 | Groundwater | 107 | 22 |
| CARPENTER W&S DISTRICT | WY5601464 | Groundwater | 94 | 8 |
| RESTWAY TRAVEL PARK | WY5601292 | Groundwater | 62 | 5 |
| MILLER LOWER MOBILE HOME PARK | WY5600051 | Groundwater | 30 | 2 |
| EVERGREEN MOBILE HOME PARK | WY5600021 | Groundwater | 26 | 67 |
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.