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National Drinking Water Database

Nitrate & nitrite in Indiana

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

The Most Polluted Communities in Indiana

163 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
1Shadeland Mobile Home Park
Lafayette, IN
761 of 115 ppm
(15 ppm)
2Bloomingdale Water Works
Bloomingdale, IN
5005 of 59.22 ppm
(8.68 to 10 ppm)
3Poseyville Municipal Water Department
Poseyville, IN
1,1871 of 18.69 ppm
(8.69 ppm)
4Montezuma Municipal Utility
Montezuma, IN
1,1791 of 18.4 ppm
(8.4 ppm)
5Elkhart Mobile Home Park
Elkhart, IN
982 of 27.7 ppm
(7.45 to 7.95 ppm)
6Sisters-St. Francis Perpetual Adoration
Mishawaka, IN
1252 of 26.3 ppm
(6 to 6.6 ppm)
7Kingsbury Utility Corporation
Kingsbury, IN
2502 of 26.1 ppm
(3.4 to 8.8 ppm)
8Fayette Township Water Assn.
New Goshen, IN
1,7171 of 16.03 ppm
(6.03 ppm)
9Darlington Water
Darlington, IN
89111 of 115.09 ppm
(4.78 to 5.5 ppm)
10Cayuga Water Department
Cayuga, IN
1,4001 of 15.08 ppm
(5.08 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 Indiana

There are no violations reported for this contaminant in Indiana