Know Your Environment. Protect Your Health.

Nitrite

Welch City Of

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
2019N/A00N/A
2020N/A00N/A
20210.520 ppm110.520 ppm
2022ND40ND
2023ND40ND

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
2018-02-1518021943-02AND
2021-01-1973575360010.520 ppm
2022-02-0830463335001ND
2022-02-0830463335002ND
2022-04-1930482106001ND
2022-12-071029220001ND
2023-02-281046560001ND
2023-04-111055540001ND
2023-07-251083570001ND
2023-11-071101550001ND