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Wyoming Water Quality
95
Utilities in database
0.5M
Residents served
45%
On private wells
2
Key contaminants tracked
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.
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
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.
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.
Wyoming Water FAQs
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Data source: Utility data from EPA SDWIS. 95 active community water systems ingested. CCR contaminant data ingestion in progress.
Last updated: 2026-04-24