Know Your Environment. Protect Your Health.

Nitrite

CTWC - Unionville 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.

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND60ND
2019ND40ND
2020ND30ND
2021ND30ND
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
2018-04-10CA16951NOXND
2018-04-10CA16950NOXND
2018-07-23CA96742ND
2018-07-23CA96743ND
2018-11-06NOX 200511903ND
2018-11-14IOC1 200512788ND
2019-02-05NOX 200520747ND
2019-02-05NOX 200520746ND
2019-09-17NOX 200549386ND
2019-09-17NOX 200549392ND
2020-07-07NOX 200581835ND
2020-07-07NOX 200581836ND
2020-10-19NOX 200594470ND
2021-03-02NOX 200608358ND
2021-03-02NOX 200608357ND
2021-09-22300073532 300073533ND
2022-03-14CK86780ND
2022-03-14CK86779ND
2022-08-23CM11959ND
2023-01-24CN29187ND
2023-01-24CN29186ND
2023-08-01CO63104ND