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National Drinking Water Database

Nitrate & nitrite in Ohio

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

The Most Polluted Communities in Ohio

575 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
1Putnam Comm. Wtr. Assoc.
Marietta, OH
2,55032 of 327.7 ppm
(3.6 to 10.3 ppm)
2Valley View Mobile HM Pk
Urbana, OH
809 of 97.65 ppm
(4.45 to 10.6 ppm)
3Village of Carey
Carey, OH
3,77811 of 116.86 ppm
(5.58 to 8.28 ppm)
4Holmes County Jail
Millersburg, OH
1203 of 36.35 ppm
(0.42 to 18.18 ppm)
5City of Urbana
Urbana, OH
11,35325 of 256.25 ppm
(2.6 to 9.9 ppm)
6Peach Grove Mobile Home Park
Louisville, OH
7510 of 106.13 ppm
(1.42 to 9 ppm)
7Village of Lowell
Lowell, OH
60320 of 206.13 ppm
(4.25 to 8.3 ppm)
8Village of Bainbridge
Bainbridge, OH
1,0502 of 25.95 ppm
(5.15 to 6.75 ppm)
9Red Wood Mobile Home Par
Harrison, OH
12011 of 115.7 ppm
(0.66 to 7.62 ppm)
10Catalina Mobile Home Pk.
Middletown, OH
1,0053 of 35.62 ppm
(4.8 to 7 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 Ohio

There are no violations reported for this contaminant in Ohio