Know Your Environment. Protect Your Health.

Nitrite

City of Redmond Water System

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.

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND40ND
2020N/A00N/A
2021ND40ND
2022ND30ND
2023ND30ND

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
2018-05-02ND
2018-05-02ND
2018-05-02ND
2019-03-06ND
2019-03-06ND
2019-03-06ND
2019-03-06ND
2021-04-144099168ND
2021-04-144099166ND
2021-04-144099170ND
2021-09-024180756ND
2022-04-274279549ND
2022-04-274279550ND
2022-04-274279548ND
2023-04-034434932ND
2023-04-034434933ND
2023-04-034434931ND