Know Your Environment. Protect Your Health.

Nitrate and nitrite

Prosser City Of

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.

 

13

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND30ND
2020N/A00N/A
2021ND30ND
2022ND30ND
2023ND10ND

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
2018-03-19ND
2018-09-11ND
2018-09-11ND
2019-03-19ND
2019-09-09ND
2019-09-09ND
2021-09-084171576ND
2021-09-084180760ND
2021-10-064183312ND
2022-09-204344726ND
2022-09-204344728ND
2022-10-054352765ND
2023-12-114553518ND