The Power of Information

National Drinking Water Database

Combined Uranium (mg/L) in Wyoming

Uranium is a radioactive element commonly found in most rocks; processed uranium ore is used for power generation and weapons manufacture. [read more]

The Most Polluted Communities in Wyoming

14 water utilities reported detecting Combined Uranium (mg/L) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Combined Uranium (mg/L) level

RankSystem Population Served Positive test results of total reported tests Average Level
1Town of Manville
Manville, WY
9710 of 1032 ppb
(30 to 40 ppb)
2Town of LA Grange
La Grange, WY
3345 of 520 ppb
(20 ppb)
3Avalon Mobile Manor
Cheyenne, WY
1201 of 120 ppb
(20 ppb)
4Town of Yoder Water System
Yoder, WY
1652 of 220 ppb
(10 to 30 ppb)
5Torrington Mun. Water System
Torrington, WY
5,6003 of 320 ppb
(20 ppb)
6Town of Lyman
Lyman, WY
2,2031 of 120 ppb
(20 ppb)
7Town of Lusk
Lusk, WY
1,4471 of 116.67 ppb
(16.67 ppb)
8Stone Creek
Torrington, WY
402 of 215 ppb
(10 to 20 ppb)
9Dillman Estates
Torrington, WY
481 of 110 ppb
(10 ppb)
10Meadow Park Homeowners Assoc
Evanston, WY
1001 of 110 ppb
(10 ppb)

Health Based Limits for Combined Uranium (mg/L)

Maximum Contaminant Limit Goal (MCLG)A non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.0 ppb
California Public Health GoalsDefined by the State of California Office of Environmental Health Hazard Assessment (OEHHA) as the level of contaminant that is allowed in drinking water. For acutely toxic substances, levels are set at which scientific evidence indicates that no known or anticipated adverse effects on health will occur, plus an adequate margin-of safety. PHGs for carcinogens or other substances which can cause chronic disease shall be based solely on health effects without regard to cost impacts and shall be set at levels which OEHHA has determined do not pose any significant risk to health.0.5 ppb
Drinking Water Equivalent LevelA lifetime exposure concentration protective of adverse, noncarcinogenic health effects, that assumes all of the exposure to a contaminant is from drinking water. Source: U.S. Environmental Protection Agency.20 ppb
Maximum Contaminant Limit (MCL)The enforceable standard which defines the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to health-based limits (Maximum Contaminant Level Goals, or MCLGs) as feasible using the best available analytical and treatment technologies and taking cost into consideration. Source: U.S. Environmental Protection Agency.30 ppb

Violation Summary for Combined Uranium (mg/L) in Wyoming

Data from the U.S. Environmental Protection Agency includes the following violations of federal standards in Wyoming since 2004

Violation TypeNumber of Violations
Failure to monitor regularly15
Over maximum contaminant level, Average1