Know Your Environment. Protect Your Health.

Nitrate and nitrite

Town of Edwards

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
2018-02-14180215-041NIND
2018-02-14180215-043NIND
2019-03-20190321-045NIND
2019-03-20190321-046NIND
2020-02-19200220-061NIND
2020-02-19200220-067NIND
2021-02-09NI-210210-075ND
2021-02-09NI-210210-078ND
2022-02-02NI-220203-029ND
2022-02-02NI-220203-030ND
2023-02-02NI-230202-061ND
2023-02-02NI-230202-062ND