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National Drinking Water Database

Nitrate & nitrite in New Mexico

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

The Most Polluted Communities in New Mexico

511 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
1Homestead Water Company
Moriarty, NM
1208 of 810.78 ppm
(7.2 to 12 ppm)
2Virden Water System
Virden, NM
14612 of 128.1 ppm
(6.06 to 9.63 ppm)
3Llano Chimayo Mdwca
Chimayo, NM
305 of 57.85 ppm
(6.7 to 9.84 ppm)
4New Mexico American Water Co (Clovis)
Clovis, NM
31,0003 of 37.63 ppm
(2.36 to 18 ppm)
5Sams Mobile Home Park
Clovis, NM
7510 of 107.38 ppm
(6.64 to 9.44 ppm)
6Valley Estates Water and Sewer Associati
Espanola, NM
1854 of 46.85 ppm
(2.4 to 9.4 ppm)
7North Park Mhp Water System
Roswell, NM
754 of 46.37 ppm
(5.96 to 6.79 ppm)
8Lone Star Trailer Ranch
Santa Fe, NM
9512 of 126.26 ppm
(5.3 to 7.03 ppm)
9Triple J Mhp
Hobbs, NM
1053 of 35.03 ppm
(4.6 to 5.3 ppm)
10Garfield Mdwca
Garfield, NM
2,39412 of 124.89 ppm
(0.02 to 7.7 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 New Mexico

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

Violation TypeNumber of Violations
Failure to monitor regularly24
Over maximum contaminant level, Single Sample12
Over maximum contaminant level, Average1