The Power of Information

National Drinking Water Database

Selenium (total) in Maine

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 Maine

78 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
1Danforth Water District
Danforth, ME
4181 of 26 ppb
(0 to 12 ppb)
2Deer Ridge Mobile Home Park
Augusta, ME
332 of 35.67 ppb
(0 to 16 ppb)
3Benjamin River Apts
Orono, ME
311 of 25.5 ppb
(0 to 11 ppb)
4Birch Haven Trailer Park
Ellsworth, ME
381 of 25.5 ppb
(0 to 11 ppb)
5Caribou Stream Mobile Home Pk
Portland, ME
951 of 25.5 ppb
(0 to 11 ppb)
6Deer Run Apts
Orono, ME
361 of 24.75 ppb
(0 to 9.5 ppb)
7Cathance Trailer Park
Topsham, ME
1442 of 34.67 ppb
(0 to 13 ppb)
8Maplewood Mobile Home Park
Woolwich, ME
751 of 34 ppb
(0 to 12 ppb)
9Farmington Village Corp W.dept
Farmington, ME
3,9251 of 33.67 ppb
(0 to 11 ppb)
10Town of Bar Harbor- Water Division
Bar Harbor, ME
4,2801 of 53.2 ppb
(0 to 16 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 Maine

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

Violation TypeNumber of Violations
Failure to monitor regularly5