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National Drinking Water Database


Dichloroacetic acid in Maine


Dichloroacetic acid is a disinfection byproduct regulated by EPA as one of five haloacetic acids that are formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water. [read more]

The Most Polluted Communities in Maine

83 water utilities reported detecting Dichloroacetic acid in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Dichloroacetic acid level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Newport Water District
Newport, ME
1,59022 of 2243.84 ppb
(7.5 to 115.5 ppb)
2St Francis Water District
St Francis, ME
8012 of 1532.8 ppb
(0 to 66 ppb)
3Southwest Harbor Water Dept.
Southwest Harbor, ME
2,38015 of 1632.6 ppb
(0 to 82 ppb)
4Eagle Lake Water & Sewer Dist.
Eagle Lake, ME
67816 of 2432.58 ppb
(0 to 92 ppb)
5Canton Water District
Canton, ME
28518 of 1929.12 ppb
(0 to 72 ppb)
6Great Salt Bay Sanitary Dist
Damariscotta, ME
1,6734 of 529.1 ppb
(0 to 51 ppb)
7North Haven Water Department
North Haven, ME
29321 of 2328.4 ppb
(0 to 86 ppb)
8Jackman Utility District
Jackman, ME
1,06023 of 2327.93 ppb
(7.2 to 48 ppb)
9Winthrop Utilities District
Winthrop, ME
2,75016 of 1627.4 ppb
(8.47 to 49 ppb)
10Mount Desert Water Dist. North
Northeast Harbor, ME
1,3756 of 626.17 ppb
(14 to 59 ppb)

Health Based Limits for Dichloroacetic acid

StandardDescriptionLevel
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 ppb
One in one million (10-6) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 1,000,000. Source: U.S. Environmental Protection Agency.0.7 ppb
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.60 ppb
One in ten thousand (10-4) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 10,000. Source: U.S. Environmental Protection Agency.70 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.100 ppb
Children's health-based limit for 1-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for up to one day of exposure. The One-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.5000 ppb
Children's health-based limit for 10-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic effects for up to ten days of exposure. The Ten-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.5000 ppb

Violation Summary for Dichloroacetic acid in Maine

There are no violations reported for this contaminant in Maine