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National Drinking Water Database

Selenium (total) in North Dakota

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 North Dakota

14 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
1Upper Souris Wua-System Ii
Kenmare, ND
2161 of 120 ppb
(20 ppb)
2Country Acres Mhp
Minot, ND
251 of 120 ppb
(20 ppb)
3City of Berthold
Berthold, ND
4661 of 120 ppb
(20 ppb)
4City of Flaxton
Flaxton, ND
731 of 120 ppb
(20 ppb)
5Upper Souris Wua-System I
Kenmare, ND
1,2421 of 110 ppb
(10 ppb)
6City of Sawyer
Sawyer, ND
3771 of 110 ppb
(10 ppb)
7City of Ross
Ross, ND
481 of 110 ppb
(10 ppb)
8City of Beulah
Beulah, ND
3,1521 of 110 ppb
(10 ppb)
9City of Alexander
Alexander, ND
2171 of 110 ppb
(10 ppb)
10City of Noonan
Noonan, ND
1541 of 110 ppb
(10 ppb)

Health Based Limits for Selenium (total)

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 North Dakota

There are no violations reported for this contaminant in North Dakota