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National Drinking Water Database

Nitrate & nitrite in Alabama

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

The Most Polluted Communities in Alabama

202 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
1City of Fairhope Water System
Fairhope, AL
38,7541 of 16.8 ppm
(6.8 ppm)
2Town of Elberta
Elberta, AL
1,2601 of 14.8 ppm
(4.8 ppm)
3Belforest Water System
Daphne, AL
3,8431 of 14 ppm
(4 ppm)
4Canoe Water Works
Atmore, AL
1,0051 of 13.44 ppm
(3.44 ppm)
5Leroy Water Authority
Leroy, AL
1,6322 of 23.04 ppm
(2.82 to 3.26 ppm)
6Tuscumbia Water Works
Tuscumbia, AL
13,3382 of 22.77 ppm
(2.58 to 2.96 ppm)
7Blue Springs Water Works
Clio, AL
6091 of 12.44 ppm
(2.44 ppm)
8Madison Water Works & Sewer
Madison, AL
39,0513 of 32.38 ppm
(1.65 to 3.1 ppm)
9Madison County Water Department
Huntsville, AL
70,6051 of 12.36 ppm
(2.36 ppm)
10Greenhill Water & Fire Pro Authority
Florence, AL
6,9001 of 12.32 ppm
(2.32 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 Alabama

There are no violations reported for this contaminant in Alabama