Know Your Environment. Protect Your Health.

Nitrate and nitrite

The Orchard Development

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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND20ND
2020ND20ND
2021ND10ND
2022ND20ND
20230.0417 ppm61ND - 0.250 ppm

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
2018-06-04AJ90654ND
2019-05-06AK16578ND
2019-05-06AK16579ND
2020-06-08AK47643ND
2020-06-08AK47645ND
2021-05-03AK74236ND
2022-05-02AL00172ND
2022-05-02AL00173ND
2023-02-14AL25540ND
2023-02-14AL25541ND
2023-02-21AL25973ND
2023-02-21AL259740.250 ppm
2023-05-01AL30524ND
2023-05-01AL30534ND