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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
51–75 of 95Pioneer Water & Sewer District
WY5600828 · 1,500 served
Rafter J Subdivision Hoa
WY5600822 · 1,500 served
Aspens Pines W&s District
WY5600220 · 1,400 served
Town of Alpine
WY5600156 · 1,300 served
Town of Ranchester
WY5600044 · 1,297 served
Antelope Valley I&s District (avisd)
WY5600251 · 1,280 served
City of Sundance
WY5600055 · 1,279 served
Town of Basin
WY5600004 · 1,250 served
Town of Mountain View
WY5600847 · 1,250 served
Bear River Regional Joint Powers
WY5601019 · 1,200 served
Town of Pine Bluffs
WY5600040 · 1,186 served
Town of Guernsey
WY5600023 · 1,157 served
Town of Upton
WY5600140 · 1,100 served
Winchester Hills
WY5600779 · 1,078 served
Burns Board of Public Utilities
WY5600188 · 1,024 served
Town of Moorcroft
WY5600037 · 1,009 served
Pioneer Mobile Home Park
WY5601173 · 1,000 served
Washakie Rural Water System
WY5601523 · 990 served
Clearview I&s District
WY5600091 · 930 served
Teton Village Water & Sewer District
WY5600218 · 906 served
South Big Horn County Jpb
WY5601454 · 900 served
Melody Ranch Improvement & Service Dist.
WY5601440 · 900 served
Town of Marbleton
WY5600223 · 861 served
Fox Park Subdivision
WY5600745 · 843 served
Town of Hanna
WY5600025 · 841 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