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National Drinking Water Database


Total haloacetic acids (HAAs) in Maine


Total haloacetic acids refers to the sum of the concentrations of five related disinfection byproducts in a water sample: dichloroacetic acid, trichloroacetic acid, monochloroacetic acid, monobromoacetic acid and dibromoacetic acid. [read more]

The Most Polluted Communities in Maine

86 water utilities reported detecting Total haloacetic acids (HAAs) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Total haloacetic acids (HAAs) level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Jackman Utility District
Jackman, ME
1,06023 of 23102.83 ppb
(45 to 170 ppb)
2Newport Water District
Newport, ME
1,59020 of 20101 ppb
(41 to 150 ppb)
3Milo Water District
Milo, ME
1,68821 of 2189.45 ppb
(40 to 150 ppb)
4St Francis Water District
St Francis, ME
8013 of 1585 ppb
(0 to 160 ppb)
5Madison Water District
Madison, ME
2,92323 of 2373.57 ppb
(24 to 127 ppb)
6Great Salt Bay Sanitary Dist
Damariscotta, ME
1,67313 of 1371.52 ppb
(36.5 to 101 ppb)
7Eagle Lake Water & Sewer Dist.
Eagle Lake, ME
67814 of 1970.58 ppb
(0 to 170 ppb)
8Canton Water District
Canton, ME
28519 of 1969.68 ppb
(25 to 170 ppb)
9Southwest Harbor Water Dept.
Southwest Harbor, ME
2,38016 of 1666.95 ppb
(5.2 to 114 ppb)
10Mars Hill Utility District
Saco, ME
1,80022 of 2357.46 ppb
(0 to 129 ppb)

Health Based Limits for Total haloacetic acids (HAAs)

StandardDescriptionLevel
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
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.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.450 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.5200 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.5200 ppb

Violation Summary for Total haloacetic acids (HAAs) 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
Over maximum contaminant level, Average190
Monitoring and Reporting Disinfection Byproduct Rule16