The Power of Information

National Drinking Water Database

Nitrate & nitrite in Alaska

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

The Most Polluted Communities in Alaska

136 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
1Little Diomede Water Supply
Little Diomede, AK
1841 of 113.2 ppm
(13.2 ppm)
2Dawn Development Corporation
Anchorage, AK
85211 of 117.97 ppm
(7.11 to 8.89 ppm)
3Westwood Water Company, Inc.
Wasilla, AK
1801 of 17.72 ppm
(7.72 ppm)
4Birchwood Mhp
Anchorage, AK
7510 of 106.71 ppm
(5.2 to 7.86 ppm)
5Scotwood Estates Water System
Wasilla, AK
751 of 16.67 ppm
(6.67 ppm)
6Greenbrook S/D
Anchorage, AK
1408 of 86.44 ppm
(5.9 to 6.82 ppm)
7Peters Creek Terrace
Anchorage, AK
705 of 56.01 ppm
(3.93 to 7.25 ppm)
8Bear Mountain Condo Assn.
Chugiak, AK
655 of 65.93 ppm
(0 to 7.52 ppm)
9Hillside Park S/D
Anchorage, AK
1369 of 95.92 ppm
(5.06 to 6.65 ppm)
10Troll Knoll S/D
Chugiak, AK
991 of 15.88 ppm
(5.88 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 Alaska

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

Violation TypeNumber of Violations
Failure to monitor regularly1