Know Your Environment. Protect Your Health.

Nitrate and nitrite

Sherwood Forest Water Company

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.

 

11

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
2020ND10ND
2021ND10ND
2022ND30ND
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
2018-01-09157500_01ND
2018-01-29157501_01ND
2019-01-02167589_01ND
2019-01-16167590_01ND
2020-01-03180689_01ND
2021-01-07198142_01ND
2022-01-06215883_01ND
2022-01-13216155_01ND
2022-03-16DW-0746ND
2023-01-03232767_01ND
2023-01-10232753_01ND