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
1–25 of 95Cheyenne Board of Public Utilities
WY5600011 · 64,165 served
City of Casper
WY5601415 · 59,000 served
City of Laramie
WY5600029 · 32,395 served
City of Gillette
WY5600019 · 32,222 served
Town of Jackson
WY5600213 · 24,760 served
City of Rock Springs
WY5601182 · 24,000 served
City of Sheridan
WY5600052 · 22,700 served
City of Evanston
WY5600150 · 12,000 served
City of Green River
WY5601181 · 10,500 served
City of Riverton
WY5600047 · 10,330 served
City of Cody
WY5600207 · 10,224 served
South Cheyenne Water & Sewer District
WY5600239 · 10,000 served
City of Rawlins Water Supply
WY5600045 · 9,006 served
Ynp-old Faithful
WY5680085 · 7,675 served
City of Lander
WY5600176 · 7,615 served
Northwest Rural Water District
WY5601254 · 7,330 served
City of Torrington Municipal Water Dept
WY5600164 · 6,847 served
City of Douglas
WY5600137 · 6,400 served
City of Powell
WY5600042 · 6,310 served
Ynp - Lake Village
WY5680079 · 5,925 served
Usaf F.e. Warren Afb
WY5680122 · 5,500 served
Worland Utilities Commission
WY5600197 · 5,487 served
Gtnp-colter Bay Village
WY5680095 · 4,514 served
City of Buffalo
WY5600005 · 4,419 served
City of Mills
WY5600036 · 4,050 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
Cheyenne Board of Public Utilities
Violation history, PFAS records, and official source links
City of Casper
Violation history, PFAS records, and official source links
City of Laramie
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