Know Your Environment. Protect Your Health.

Nitrite

Danbury Water Department

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND60ND
2020ND20ND
2021ND20ND
2022ND40ND
2023ND60ND

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
2018-04-12212690GEND
2018-04-12212687GEND
2018-07-12NOX 200499427ND
2018-07-12NOX 200499426ND
2019-04-11NOX 200528182ND
2019-04-11NOX 200528181ND
2019-04-11NOX 200528185ND
2019-04-11NOX 200528187ND
2019-11-21NOX 200557773ND
2019-11-21NOX 200557768ND
2020-02-20NOX 200566893ND
2020-02-20NOX 200566892ND
2021-12-16278015ND
2021-12-16278014ND
2022-06-07287323ND
2022-06-07287327ND
2022-12-15303055ND
2022-12-15303056ND
2023-01-12304532ND
2023-01-12304533ND
2023-05-15N3E0590-02PPSND
2023-05-15N3E0590-01PPSND
2023-11-09CP44983ND
2023-11-09CP44982ND