Know Your Environment. Protect Your Health.

Nitrate and nitrite

Farmington Water Association

Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
2020ND20ND
2021ND20ND
2022ND20ND
2023ND20ND

ppm = parts per million

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.14 ppm

The EWG health guideline of 0.14 parts per million, or ppm, for nitrate and nitrite is based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. This guideline represents a one-in-one-million annual cancer risk level.

EPA Maximum Contaminant
Level (MCL): 10 ppm

ppm = parts per million

All test results

Date Lab ID Result
2018-01-23180124-043NIND
2018-01-23180124-054NIND
2019-01-22190123-092NIND
2019-01-22190123-093NIND
2020-01-13200114-027NIND
2020-01-13200114-030NIND
2021-01-20NI-210121-055ND
2021-01-20NI-210121-056ND
2022-01-03NI-220104-020ND
2022-01-03NI-220104-021ND
2023-01-11NI-230112-012ND
2023-01-11NI-230112-013ND