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National Drinking Water Database


Arsenic (total) in Maine


Arsenic contaminates drinking water due to mining runoff, erosion of natural deposits, emissions from glass and electronics processing and the use of arsenical compounds as wood preservatives and pesticides. [read more]

The Most Polluted Communities in Maine

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

Ranked by highest average Arsenic (total) level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Tanglewood Mobile Estates 2
Hollis Center, ME
503 of 323 ppb
(21 to 26 ppb)
2Tanglewood Mobile Estates 1
Hollis Center, ME
5517 of 1714.29 ppb
(0.9 to 30 ppb)
3Grandeur Mobile Home Estates
Carmel, ME
1005 of 613.88 ppb
(0 to 29 ppb)
4Turner Properties Inc. Mhp
Augusta, ME
586 of 613.22 ppb
(0.73 to 20 ppb)
5Harborview I & Ii
Blue Hill, ME
5115 of 1511.97 ppb
(8.4 to 13 ppb)
6Blueberry Ridge M.H. Village
Wells, ME
12812 of 1311.12 ppb
(0 to 21 ppb)
7Birch Tree Meadows M.H.P.
Ellsworth, ME
10511 of 1510.85 ppb
(0 to 20 ppb)
8Island Falls Water Dept.
Island Falls, ME
57025 of 2910.8 ppb
(0 to 30 ppb)
9The Meadows
Greene, ME
4910 of 1310.46 ppb
(0 to 18 ppb)
10Harmon Pines Development
Portland, ME
408 of 810.38 ppb
(10 to 11 ppb)

Health Based Limits for Arsenic (total)

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
California Public Health GoalsDefined by the State of California Office of Environmental Health Hazard Assessment (OEHHA) as the level of contaminant that is allowed in drinking water. For acutely toxic substances, levels are set at which scientific evidence indicates that no known or anticipated adverse effects on health will occur, plus an adequate margin-of safety. PHGs for carcinogens or other substances which can cause chronic disease shall be based solely on health effects without regard to cost impacts and shall be set at levels which OEHHA has determined do not pose any significant risk to health.<0.01 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.0.02 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.0.02 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.2 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.10 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.10 ppb

Violation Summary for Arsenic (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
Over maximum contaminant level, Average64
Failure to monitor regularly9
Over maximum contaminant level, Single Sample4