Know Your Environment. Protect Your Health.

Nitrite

Standard

Nitrite, closely related to the fertilizer chemical nitrate, comes from urban runoff and from fertilizer applied to agricultural lands to pollute drinking water. Nitrite is significantly more toxic than nitrate. Excessive nitrite in water can cause oxygen deprivation in infants and increase the risk of cancer.

 

10

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
20200.240 ppm110.240 ppm
20210.340 ppm110.340 ppm
20220.351 ppm220.157 ppm - 0.544 ppm
20230.404 ppm440.203 ppm - 0.809 ppm

ppm = parts per million

State, National, and Health Guidelines for Drinking Water

EPA Maximum Contaminant
Level (MCL): 1 ppm

The legal limit for nitrite, established in 1991, was based on the rate of conversion of ingested nitrate into nitrite in adults. This limit may not fully protect against the risk of cancer due to nitrite exposure.

ppm = parts per million

All test results

Date Lab ID Result
2018-09-1018I0268-01ND
2019-08-1319H0526-01ND
2020-08-0420H0144-010.240 ppm
2021-08-2321H1204-010.340 ppm
2022-07-19220700613-0010.544 ppm
2022-12-13221200423-0010.157 ppm
2023-01-09230100227-0010.809 ppm
2023-04-04230400066-0010.255 ppm
2023-08-09230800463-0010.350 ppm
2023-10-11231000517-0010.203 ppm