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National Drinking Water Database


Nitrate & nitrite in Virginia


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

The Most Polluted Communities in Virginia

98 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)
1Keswick Estates
Keswick, VA
1201 of 130 ppm
(30 ppm)
2Town of Altavista
Altavista, VA
3,8501 of 126.67 ppm
(26.67 ppm)
3Stoney Creek Sanitary District
Woodstock, VA
2,2803 of 325 ppm
(17.5 to 30 ppm)
4Courtney Subdivision
Warwick, VA
1872 of 320 ppm
(0 to 30 ppm)
5Ncsa - Lovingston
Lovingston, VA
2,4932 of 318.89 ppm
(0 to 30 ppm)
6Christchurch School
Christchurch, VA
3002 of 316.67 ppm
(0 to 30 ppm)
7Hampden-Sydney College
Hampden Sydney, VA
1,0501 of 215 ppm
(0 to 30 ppm)
8Flowering Fields
Kilmarnock, VA
302 of 415 ppm
(0 to 30 ppm)
9Mountain Vista Village
Martinsville, VA
1001 of 215 ppm
(0 to 30 ppm)
10Laurel Point
Lancaster, VA
783 of 315 ppm
(10 to 20 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 Virginia

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

Violation TypeNumber of Violations
Failure to monitor regularly95