The Power of Information

National Drinking Water Database


Radium-226 in Arkansas


Radium-226 is a radioactive element usually found around uranium deposits. [read more]

The Most Polluted Communities in Arkansas

269 water utilities reported detecting Radium-226 in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Radium-226 level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Sdm Water Association
Marshall, AR
37322 of 226.6 pCi/L
(5.5 to 9.6 pCi/L)
2South Mountain Water Assn
Marshall, AR
44022 of 226.33 pCi/L
(5.1 to 8.4 pCi/L)
3MT Sherman Water Association
Jasper, AR
73222 of 225.3 pCi/L
(2.5 to 6.2 pCi/L)
4Mockingbird Hill Water Assoc
Jasper, AR
69325 of 254.6 pCi/L
(3.6 to 6.4 pCi/L)
5Diamond City Water
Diamond City, AR
1,39024 of 243.95 pCi/L
(2 to 5.2 pCi/L)
6Big Flat Waterworks
Big Flat, AR
52320 of 213.62 pCi/L
(0 to 4.6 pCi/L)
7East Newton County Water Assn
Vendor, AR
1,52823 of 243.55 pCi/L
(0 to 5.2 pCi/L)
8Lead Hill Waterworks
Lead Hill, AR
48224 of 243.19 pCi/L
(0.6 to 4.4 pCi/L)
9Norfork Lake Estates Water Sys
Cotter, AR
8624 of 243.15 pCi/L
(1.8 to 4.1 pCi/L)
10Valley Springs Waterworks
Valley Springs, AR
2,95025 of 252.93 pCi/L
(1.77 to 4.83 pCi/L)

Health Based Limits for Radium-226

StandardDescriptionLevel
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 pCi/L
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.0.05 pCi/L
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.5 pCi/L
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.5 pCi/L

Violation Summary for Radium-226 in Arkansas

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

Violation TypeNumber of Violations
Over maximum contaminant level, Single Sample1