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National Drinking Water Database


Nitrate & nitrite in Utah


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

The Most Polluted Communities in Utah

203 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)
1Mac Allred Mobile Home Park
Fielding, UT
481 of 114.5 ppm
(14.5 ppm)
2Flying L Subdivision
Cedar City, UT
303 of 34.97 ppm
(4.48 to 5.45 ppm)
3Apple Valley Water Company
Apple Valley, UT
1001 of 14.95 ppm
(4.95 ppm)
4Woods Cross Water System
Woods Cross, UT
8,4001 of 14.7 ppm
(4.7 ppm)
5Cedar City Waterworks Sys
Cedar City, UT
23,3805 of 53.87 ppm
(0.55 to 8.5 ppm)
6Buena Vista Community
Cedar City, UT
3002 of 23.83 ppm
(3.17 to 4.49 ppm)
7North Salt Lake
Bountiful, UT
6,4743 of 33.55 ppm
(1.55 to 5 ppm)
8Kane Co Wcd-Johnson Canyon
Kanab, UT
2172 of 23.3 ppm
(1.6 to 5 ppm)
9Escalante Valley Housing
Beryl, UT
1201 of 13.16 ppm
(3.16 ppm)
10Ephraim
Ephraim, UT
3,5002 of 23.15 ppm
(2.9 to 3.4 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 Utah

There are no violations reported for this contaminant in Utah