Know Your Environment. Protect Your Health.

Nitrite

City of Post Falls

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
2018N/A00N/A
2019ND70ND
2020N/A00N/A
2021N/A00N/A
2022ND30ND
2023N/A00N/A

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
2019-11-12I210891ND
2019-11-13I210941ND
2019-11-18I211059ND
2019-11-18I211062ND
2019-11-19I211103ND
2019-12-09I211716ND
2019-12-16I211917ND
2022-03-14I238767ND
2022-06-06I241708ND
2022-07-13I243511ND