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National Drinking Water Database


Selenium (total) in Missouri


Selenium is a naturally occurring element that contaminates water due to mining or petrolum refining, fly-ash from coal-burning power plants, and irrigation of arid farmland soils high in selenium. [read more]

The Most Polluted Communities in Missouri

23 water utilities reported detecting Selenium (total) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Selenium (total) level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Maitland
Maitland, MO
3424 of 49.28 ppb
(<0.01 to 17.1 ppb)
2Bosworth
Bosworth, MO
3803 of 35.78 ppb
(0.01 to 10.4 ppb)
3Youngberg Estates Mhp
Verona, MO
1121 of 25.4 ppb
(0 to 10.8 ppb)
4Forest Hill Mhp
Dittmer, MO
306 of 114.28 ppb
(0 to 17.2 ppb)
5Hometown Court
Troy, MO
272 of 22.82 ppb
(<0.01 to 5.63 ppb)
6Sparta Mhp
Sparta, MO
752 of 22.5 ppb
(<0.01 to 5 ppb)
7Osborn
Osborn, MO
4802 of 32.05 ppb
(0 to 6.14 ppb)
8Clearmont
Clearmont, MO
1902 of 31.85 ppb
(0 to 5.55 ppb)
9Crane
Crane, MO
1,3902 of 21.54 ppb
(<0.01 to 3.08 ppb)
10Albany
Albany, MO
2,0001 of 30.38 ppb
(0 to 1.13 ppb)

Health Based Limits for Selenium (total)

StandardDescriptionLevel
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.50 ppb
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.50 ppb
Lifetime health-based limit, non-cancer riskConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for a lifetime of exposure. The Lifetime health-based limit (or Health Advisory, HA) is based on exposure for a a 70-kg adult consuming 2 liters of water per day. Source: U.S. Environmental Protection Agency.50 ppb
EPA Human Health Water Quality CriteriaWater quality criteria set by the US EPA provide guidance for states and tribes authorized to establish water quality standards under the Clean Water Act (CWA) to protect human health. These are non-enforceable standards based upon exposure by both drinking water and the contribution of water contamination to other consumed foods. Source: U.S. Environmental Protection Agency.170 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.200 ppb

Violation Summary for Selenium (total) 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 regularly28