All water systems in Wyoming
773 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
South Big Horn County Jpb Basin · Big Horn County |
900 | 1 | 0 | |
|
Marbleton, Town of Marbleton · Sublette County |
861 | 7 | 1 | |
|
K Bar Z Guest Ranch Cody · Park County |
847 | 2 | 1 | |
|
Fox Park Subdivision Gillette · Campbell County |
843 | 0 | 0 | |
|
WY Dot-Bitter Creek East RA Rock Springs · Sweetwater County |
843 | 0 | 0 | |
|
Hanna, Town of Hanna · Carbon County |
841 | 2 | 0 | |
|
Veterans Administration Medical Center Sheridan · Sheridan County |
802 | 5 | 1 | |
|
WY Dot-Bitter Creek West RA Rock Springs · Sweetwater County |
801 | 0 | 0 | |
|
Alcova Lake Park Trailer Village Mills · Natrona County |
800 | 2 | 0 | |
|
Cowley, Town of Cowley · Big Horn County |
800 | 2 | 1 | |
|
Simplot Phosphates, LLC Rock Springs · Sweetwater County |
800 | 0 | 0 | |
|
Bedford Water & Sewer District Bedford · Lincoln County |
750 | 2 | 0 | |
|
Heritage Village Subdivision Gillette · Campbell County |
750 | 0 | 0 | |
|
WY Dot-Wagonhound Rest Area Laramie · Carbon County |
750 | 0 | 0 | |
|
Foothills Mobile Home Park Gillette · Campbell County |
735 | 0 | 0 | |
|
Greater Smoot W&s District Smoot · Lincoln County |
720 | 0 | 0 | |
|
Brush Creek Ranch Saratoga · Carbon County |
717 | 2 | 1 | |
|
Tata Chemicals Soda Ash Partners, LLC Green River · Sweetwater County |
701 | 1 | 0 | |
|
Skyline Village Mobile Home PK Rock Springs · Sweetwater County |
700 | 2 | 0 | |
|
Eastview Manufactured Home Community Gillette · Campbell County |
688 | 0 | 0 | |
|
West Winds Cheyenne · Laramie County |
663 | 0 | 0 | |
|
Arapahoe Industrial Park County |
650 | 1 | 0 | |
|
Black Thunder East, LLC Admin Gillette · Campbell County |
650 | 0 | 0 | |
|
WY Dot-Dwyer Junction Rest Area Casper · Platte County |
650 | 0 | 0 | |
|
High Meadow Ranch Sublette County |
622 | 1 | 1 | |
|
Big Country Estates Cheyenne · Laramie County |
615 | 0 | 0 | |
|
Mhvc Visitors Center Alcova · Natrona County |
612 | 0 | 0 | |
|
Black Thunder Coal Mine Wright · Campbell County |
600 | 0 | 0 | |
|
Gtnp-Flagg Ranch Moose · Teton County |
600 | 0 | 0 | |
|
Salt Creek Water District Newcastle · Weston County |
600 | 1 | 1 | |
|
McDonald's (preiss Corporation) Cheyenne · Laramie County |
575 | 1 | 0 | |
|
Travel Centers of America-Ft. Bridger Fort Bridger · Uinta County |
570 | 1 | 0 | |
|
Byron, Town of Byron · Big Horn County |
561 | 0 | 0 | |
|
Jamestown-Rio Vista W&s District Green River · Sweetwater County |
560 | 0 | 0 | |
|
Navajo Trans Engr Co., LLC (antelope) Gillette · Converse County |
550 | 0 | 0 | |
|
Navajo Trans Enrg. Co., LLC (cordero) Gillette · Campbell County |
550 | 0 | 0 | |
|
Broken Wheel Truck Stop Douglas · Converse County |
540 | 6 | 2 | |
|
Cokeville, Town of Cokeville · Lincoln County |
535 | 9 | 0 | |
|
Farson Eden School Farson · Sweetwater County |
530 | 6 | 0 | |
|
Lds-Buffalo Ridge Church Cheyenne · Laramie County |
530 | 2 | 1 | |
|
Antelope Butte Ski Area Dayton · Big Horn County |
527 | 3 | 0 | |
|
Little America Hotels & Resorts Cheyenne Cheyenne · Laramie County |
525 | 1 | 0 | |
|
Devils Tower Koa-Campstool Devils Tower · Crook County |
516 | 2 | 0 | |
|
Shoshoni, Town of Shoshoni · Fremont County |
515 | 1 | 0 | |
|
Hogadon Ski Area Casper · Natrona County |
504 | 1 | 0 | |
|
Snowy Range Ski Area Centennial · Albany County |
503 | 0 | 0 | |
|
Grand Teton Park RV Resort Moran Jct · Teton County |
502 | 3 | 1 | |
|
WY Dot-Diversion Dam RA County |
501 | 0 | 0 | |
|
Buffalo Bill Dam Visitor Center Cody · Park County |
500 | 1 | 0 | |
|
Crestview Estates Subdivision Gillette · Campbell County |
500 | 0 | 0 |
About this data
Rules violated counts the rules a system was in violation of in the past three years, including monitoring and reporting lapses; one rule can carry several violations. Unresolved is the number of those rules still in violation at EPA's latest data refresh.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Wyoming records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.