The Power of Information

National Drinking Water Database

Combined Uranium (mg/L) in Arkansas

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 Arkansas

28 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
1Holiday Island Waterworks
Eureka Springs, AR
3,45311 of 122.93 ppb
(0 to 4.8 ppb)
2Gassville Waterworks
Gassville, AR
1,5471 of 12.5 ppb
(2.5 ppb)
3Tall Oaks Mhp
Mountain Home, AR
3711 of 112.38 ppb
(1.2 to 6 ppb)
4Sidney Water System
Sidney, AR
3375 of 52.16 ppb
(2 to 2.3 ppb)
5Kings Hill Estates
Berryville, AR
252 of 21.9 ppb
(1.8 to 2 ppb)
6AR Dept of Correction Izard Co
Calico Rock, AR
6001 of 11.9 ppb
(1.9 ppb)
7Kingwood Mhp
Gamaliel, AR
642 of 21.75 ppb
(1.6 to 1.9 ppb)
8Wilton Waterworks
Wilton, AR
5003 of 31.7 ppb
(1.6 to 1.8 ppb)
9Cotter Waterworks
Cotter, AR
1,0341 of 11.7 ppb
(1.7 ppb)
10Hardy Waterworks
Hardy, AR
8682 of 21.3 ppb
(1.2 to 1.4 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 Arkansas

There are no violations reported for this contaminant in Arkansas