State Hub
Wyoming Water Quality
95
Utilities in database
0.5M
Residents served
0
With open violations
30
PFAS monitored
Quick Answer
Wyoming public drinking water is served by 95 EPA-tracked water systems, providing service to approximately 0.5 million residents through public utilities. No open health-based violations are currently recorded across tracked systems in the EPA federal database. 30 systems have official PFAS monitoring records from the EPA UCMR 5 program (2023–2025). About 45% of WY residents use private wells, which fall outside federal utility compliance monitoring.
No open health-based violations are currently recorded in the EPA SDWIS database for Wyoming's tracked water systems. Always verify with your utility's Consumer Confidence Report for annual test results.
Drinking Water in Wyoming
Wyoming has 95 community water systems serving approximately 0.5 million residents. Primary water sources include groundwater. The most commonly reported contaminants include disinfection byproducts, lead. 45% of Wyoming residents rely on private wells. DEQ holds primary enforcement authority under the Safe Drinking Water Act.
Safest Large Utilities
Wyoming systems with no open health violations serving 10,000+ residents.
Utilities in Wyoming
26–50 of 95Town of Bar Nunn
WY5600067 · 4,000 served
Town of Wheatland
WY5600187 · 3,659 served
City of Newcastle
WY5600256 · 3,595 served
Kemmerer-diamondville Jpb
WY5600028 · 3,348 served
Town of Greybull
WY5600022 · 3,260 served
White Mountain W&s District
WY5601391 · 3,000 served
Town of Thermopolis
WY5600056 · 2,775 served
Town of Evansville
WY5600018 · 2,728 served
Ynp-mammoth Hot Springs
WY5680092 · 2,600 served
Wright Water & Sewer District
WY5600136 · 2,500 served
Town of Glenrock
WY5600199 · 2,466 served
Sleepy Hollow Subdivision
WY5600764 · 2,400 served
Town of Lovell
WY5600031 · 2,360 served
Town of Lyman
WY5600033 · 2,203 served
Town of Star Valley Ranch
WY5600287 · 2,030 served
Little America Hotels & Resorts, Inc- Wy
WY5600097 · 2,004 served
Afton, Board of Pub Utilities
WY5600002 · 2,000 served
Leisure Valley Inc/ Star Valley Rv Park
WY5601471 · 1,910 served
Pinedale Municipal Ws
WY5600041 · 1,900 served
Gtnp-jackson Lake Lodge
WY5680103 · 1,830 served
Town of Dubois
WY5600177 · 1,822 served
Bridger Valley Joint Powers Board
WY5600757 · 1,728 served
Town of Saratoga
WY5600061 · 1,720 served
Vista West Water Company
WY5600069 · 1,600 served
Town of Lusk
WY5600032 · 1,576 served
Key Contaminant Concerns in Wyoming
These contaminants appear most frequently in Wyoming utility records or pose elevated risk in this region based on EPA data.
Lead
Lead is a naturally occurring heavy metal that was widely used in plumbing infrastructure until it was banned for new installations in 1986. An estimated 9.2 million lead service lines still connect homes to public water mains across the United States, along with millions of homes with lead solder in their internal plumbing. Critically, a utility's water quality report can show zero detected lead at the treatment plant while your specific tap still delivers elevated lead — because the contamination happens inside the distribution system and your home's plumbing, not at the source.
EPA limit: 15 ppb (action level)
DBPs
When utilities add chlorine to water to kill pathogens, it reacts with dissolved organic matter — leaves, algae, soil — to produce disinfection byproducts (DBPs). Over 600 DBPs have been identified. The EPA regulates two groups: total trihalomethanes (TTHMs, including chloroform) and haloacetic acids (HAA5). DBP levels tend to be highest in surface water systems and in warm months when organic matter is elevated.
EPA limit: 80 µg/L (TTHMs) / 60 µg/L (HAA5)
City Water Reports in Wyoming
Tap water quality pages for Wyoming cities — violations, PFAS records, utility profiles, and official source links.
Independent Water Testing
Find a certified lab in Wyoming
Utility compliance records show what water systems report to the EPA. An independent test from a certified laboratory confirms what's actually in your tap water. Wyoming labs can test for PFAS, lead, nitrates, bacteria, and dozens of other contaminants.
Explore Water Quality in Wyoming
Town of Bar Nunn
Violation history, PFAS records, and official source links
Town of Wheatland
Violation history, PFAS records, and official source links
City of Newcastle
Violation history, PFAS records, and official source links
PFAS monitoring records — Wyoming
30 water systems in Wyoming with EPA UCMR 5 records
Lead in Wyoming drinking water
State-specific lead data, violation utilities, and testing guidance
PFAS in Wyoming drinking water
State-specific PFAS data, MCL context, and treatment options
Certified water testing labs in Wyoming
Labs certified for PFAS (EPA 533/537.1), lead, and bacteria testing
Water treatment options
Reverse osmosis, activated carbon, and filtration guides with cost ranges
Data sources and methodology
How WaterUtilityReport.com sources and validates official EPA data
Common Questions About Wyoming Drinking Water
Does Wyoming drinking water have PFAS?
30 Wyoming water systems have EPA UCMR 5 PFAS monitoring records (2023–2025)
Which Wyoming water utilities have open violations?
Browse Wyoming utility compliance records and violation history
How do I test my water in Wyoming?
State-certified labs for PFAS (EPA 533/537.1), lead, nitrate, and bacteria testing
What treatment removes PFAS from WY tap water?
Reverse osmosis removes PFAS, lead, arsenic, and nitrates — cost, maintenance, and NSF certification explained
What do Wyoming PFAS records tell me about my water?
EPA limits, health context, and what UCMR 5 detection above MRL means for your water
How is Wyoming water quality data sourced here?
EPA SDWIS violations, UCMR 5 PFAS records, and CCR data — sources, accuracy notes, and limitations
Wyoming Water FAQs
Data sources: Utility compliance and violation data from EPA SDWIS (Safe Drinking Water Information System). PFAS monitoring records from EPA UCMR 5 (Unregulated Contaminant Monitoring Rule 5, 2023–2025). Contaminant data from EPA and ATSDR public references. This page summarizes public records — it is not a compliance determination. Methodology →
Last updated: 2026-04-24