The Power of Information

National Drinking Water Database

Combined Radium (-226 & -228) in Montana

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

The Most Polluted Communities in Montana

91 water utilities reported detecting Combined Radium (-226 & -228) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Combined Radium (-226 & -228) level

RankSystem Population Served Positive test results of total reported tests Average Level
1Sand Coulee Water Users Assn
Sand Coulee, MT
1614 of 43.8 pCi/L
(2.6 to 4.4 pCi/L)
2Beaverhead Jackson Water and Sewer Dist
Jackson, MT
301 of 13.6 pCi/L
(3.6 pCi/L)
3Spanish Peaks Resort Pws
355 of 53.4 pCi/L
(2.3 to 4.8 pCi/L)
4Milltown Water Users Assoc
Milltown, MT
1051 of 13.3 pCi/L
(3.3 pCi/L)
5Spring Tree Ridge
754 of 52.76 pCi/L
(0 to 4.7 pCi/L)
6Hot Springs Municipal Water
Hot Springs, MT
5553 of 62.47 pCi/L
(0 to 7.1 pCi/L)
7Gore Hill County Water Dist
Great Falls, MT
5001 of 12.35 pCi/L
(2.35 pCi/L)
8Town of Grass Range
Grass Range, MT
1001 of 12.3 pCi/L
(2.3 pCi/L)
9North Shore Estates Hoa
Thompson Falls, MT
652 of 42.25 pCi/L
(0 to 4.5 pCi/L)
10Town of Chester
Chester, MT
9501 of 12.2 pCi/L
(2.2 pCi/L)

Health Based Limits for Combined Radium (-226 & -228)

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
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 Combined Radium (-226 & -228) in Montana

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

Violation TypeNumber of Violations
Failure to monitor regularly57