Wyoming Tap Water Quality
Check a Wyoming ZIP Code
Overview
Cheyenne pipes mountain water from the Laramie Range and Colorado's Little Snake headwaters, Casper treats North Platte alluvial wells, and the state's small population rides on generally clean high-plains and mountain sources. Major systems comply fully.
With the nation's smallest population spread across hundreds of tiny systems, Wyoming's issues are scale and geology: naturally occurring uranium, radium, and fluoride in scattered groundwater, legacy uranium-district wells in the Gas Hills and Shirley Basin, and produced-water questions in oil-and-gas country (the Pavillion groundwater investigation remains the reference case).
Common Contaminants in Wyoming
Natural occurrences plus mining-district legacy affect scattered wells and a few small systems
Naturally high in some basins, occasionally above the secondary standard
The Pavillion investigation examined methane and organics in domestic wells near gas fields; monitoring and cistern programs followed
Violations & Compliance
Large-system compliance is solid; the state's violation profile is dominated by monitoring lapses and radionuclide exceedances in very small systems, often resolved by new wells or hookups to regional supply.
City Reports for Wyoming
We haven't published individual city water reports for Wyoming yet. Use the ZIP lookup for a statewide assessment, and check your utility's annual Consumer Confidence Report for local detail.
Frequently Asked Questions
Sources & References
The safety rating and guidance on this page draw on the following sources. See our full methodology.
- •US EPA Safe Drinking Water Act regulations
- •EWG Tap Water Database
- •The utility's most recent Consumer Confidence Report (CCR)
- •WHO Guidelines for Drinking-water Quality