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National Drinking Water Database


Nitrate & nitrite in Missouri


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

The Most Polluted Communities in Missouri

672 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
(Range)
1Maitland
Maitland, MO
34240 of 407.21 ppm
(5.56 to 9.35 ppm)
2Bosworth
Bosworth, MO
3807 of 75.88 ppm
(5.3 to 6.2 ppm)
3Sunset Mhp
MO
10214 of 145.52 ppm
(3.65 to 9.27 ppm)
4Hannibal
Hannibal, MO
17,4566 of 65.14 ppm
(3.24 to 6.94 ppm)
5Platte Co Pwsd #4
Platte City, MO
6,2866 of 65.01 ppm
(4.13 to 5.98 ppm)
6Osborn
Osborn, MO
4805 of 54.97 ppm
(4.76 to 5.18 ppm)
7Whitewater/Allenville
Jackson, MO
2206 of 64.55 ppm
(4.1 to 5.19 ppm)
8Louisiana
Louisiana, MO
3,7816 of 64.32 ppm
(1.72 to 6.61 ppm)
9Clearmont
Clearmont, MO
1903 of 34.25 ppm
(3.98 to 4.55 ppm)
10Country Club Mhp
Carthage, MO
1504 of 44.08 ppm
(3.86 to 4.33 ppm)

Health Based Limits for Nitrate & nitrite

StandardDescriptionLevel
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 Missouri

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

Violation TypeNumber of Violations
Failure to monitor regularly70