The Power of Information

National Drinking Water Database

Alpha particle activity in Missouri

Alpha particles are a form of radiation released from mining waste pollutants and natural sources. [read more]

The Most Polluted Communities in Missouri

890 water utilities reported detecting Alpha particle activity in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Alpha particle activity level

RankSystem Population Served Positive test results of total reported tests Average Level
1Autumn Hills Mhp
St Peters, MO
50016 of 1633.53 pCi/L
(19.7 to 43.25 pCi/L)
2Charwood Estates
Troy, MO
1106 of 627.4 pCi/L
(13.6 to 39.7 pCi/L)
Noel, MO
1,5801 of 127.24 pCi/L
(27.24 pCi/L)
Farmington, MO
11,22431 of 3124.98 pCi/L
(10.4 to 35.93 pCi/L)
5MC Donald Co Pwsd #3
Noel, MO
56019 of 1924.53 pCi/L
(12.7 to 37.9 pCi/L)
6Westlake Meadows Subdivision
5516 of 1621.57 pCi/L
(11 to 30.8 pCi/L)
7Walnut Grove Mhp
Farmington, MO
13520 of 2021.51 pCi/L
(13.6 to 30 pCi/L)
8Hunters Ridge Subd
Farmington, MO
23721 of 2121.17 pCi/L
(6.2 to 27.1 pCi/L)
9Park Hills
Park Hills, MO
12,55518 of 1821.05 pCi/L
(4.4 to 38.9 pCi/L)
10Mineral Point
Mineral Point, MO
40017 of 1721 pCi/L
(13.7 to 31.4 pCi/L)

Health Based Limits for Alpha particle activity

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.15 pCi/L

Violation Summary for Alpha particle activity in Missouri

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

Violation TypeNumber of Violations
Failure to monitor regularly17