Chromium violations in Wyoming
22 active public water systems in Wyoming had a Chromium violation in the past three years. What Chromium is and why it matters.
Health effects: Hexavalent chromium is associated with increased cancer risk through ingestion in animal studies and is classified by EPA as a probable human carcinogen (Group B1) for inhalation, with growing evidence for oral carcinogenicity. Chronic exposure to total chromium causes liver and kidney damage, allergic dermatitis, and gastrointestinal irritation. Individuals with pre-existing liver or kidney conditions face greater risk.
Systems with a Chromium violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Jackson, Town of Jackson · Teton County |
24,760 | 5 | 1 | |
|
Rawlins Water Supply, City of Rawlins · Carbon County |
9,006 | 6 | 1 | |
|
Newcastle, City of Newcastle · Weston County |
3,595 | 4 | 0 | |
|
Arng-Camp Guernsey Cantonment Camp Guernsey · Platte County |
2,000 | 7 | 0 | |
|
Saratoga, Town of Saratoga · Carbon County |
1,720 | 6 | 0 | |
|
Lusk, Town of Lusk · Niobrara County |
1,576 | 4 | 0 | |
|
Marbleton, Town of Marbleton · Sublette County |
861 | 7 | 1 | |
|
Broken Wheel Truck Stop Douglas · Converse County |
540 | 6 | 2 | |
|
Cokeville, Town of Cokeville · Lincoln County |
535 | 9 | 0 | |
|
Pub Place Jackson · Teton County |
497 | 6 | 0 | |
|
Lingle, Town of Lingle · Goshen County |
486 | 5 | 0 | |
|
LA Grange, Town of La Grange · Goshen County |
448 | 4 | 0 | |
|
West End Water District Newcastle · Weston County |
225 | 6 | 1 | |
|
North Alpine I&s District Alpine · Lincoln County |
200 | 9 | 0 | |
|
Mountain View Acres Riverton · Fremont County |
165 | 8 | 0 | |
|
Water Unlimited, Incorporated Newcastle · Weston County |
144 | 7 | 2 | |
|
Farview Water and Sewer District Riverton · Fremont County |
60 | 5 | 1 | |
|
Mountain Village Parks Big Piney · Sublette County |
53 | 10 | 5 | |
|
Evergreen Mobile Home Park Cheyenne · Laramie County |
35 | 10 | 2 | |
|
Teton Science School-Wilson Campus Jackson · Teton County |
31 | 7 | 0 | |
|
Broken Wrench LLC Casper · Natrona County |
30 | 6 | 0 | |
|
Hagens Estates Gillette · Campbell County |
29 | 9 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Chromium, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Chromium alone.
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.