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National Drinking Water Database

Nitrate & nitrite in Maine

Nitrate and nitrite enter water from fertilizer runoff, leaching from septic tanks, and erosion of natural deposits.

The Most Polluted Communities in Maine

310 water utilities reported detecting Nitrate & nitrite in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Nitrate & nitrite level

RankSystem Population Served Positive test results of total reported tests Average Level
1Washburn Water Dept.
Washburn, ME
7682 of 28.67 ppm
(5.64 to 11.7 ppm)
2Limestone Water & Sewer District
Limestone, ME
8533 of 38.53 ppm
(8.3 to 8.69 ppm)
3Sunny Slope Trailer Park
Caribou, ME
1253 of 35.49 ppm
(4.9 to 5.86 ppm)
4Mapletree Estates
Presque Isle, ME
753 of 34.9 ppm
(4.1 to 5.38 ppm)
5Mcculley Commons Apartments
Portland, ME
724 of 44.73 ppm
(3.5 to 7.12 ppm)
6Windermere Apartments
Presque Isle, ME
512 of 24.31 ppm
(1.1 to 7.51 ppm)
7Pleasant Acres Mobile Home Pk
Palmyra, ME
1856 of 64.24 ppm
(2.4 to 5.5 ppm)
8Oxford Pines Trailer Pk
Minot, ME
3387 of 74.23 ppm
(3.65 to 5.13 ppm)
9Town and Country Apartments
Presque Isle, ME
1362 of 24.02 ppm
(3.4 to 4.63 ppm)
10Wentworth Mobile Home Park
Bangor, ME
756 of 63.89 ppm
(2.75 to 5 ppm)

Health Based Limits for Nitrate & nitrite

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 ppm
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.10 ppm
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.10 ppm

Violation Summary for Nitrate & nitrite in Maine

There are no violations reported for this contaminant in Maine