Know Your Environment. Protect Your Health.

Nitrite

Norwich Public Utilities

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
2019ND30ND
2020ND30ND
2021ND20ND
20220.0433 ppm31ND - 0.130 ppm
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
2018-05-11PH-0453-6304155NOXND
2018-05-11PH-0453-6304156NOXND
2018-05-11PH-0453-6304154NOXND
2019-08-29PH-0453-6304853NOXND
2019-08-29PH-0453-6304855NOXND
2019-09-19PH-0453-6304854NOXND
2020-06-10PH-0453-6305938NOXND
2020-08-03PH-0453-6305937NOXND
2020-08-03PH-0453-6305936NOXND
2021-05-24PH-0453-6307269NOXND
2021-06-23PH-0453-6307271NOXND
2022-01-13PH-0453-6308027NOXND
2022-02-03PH-0453-6308029NOXND
2022-11-21PH-0453-6308028NOX0.130 ppm
2023-11-14D3K1545-01NO2ND
2023-11-14D3K1545-02NO2ND
2023-11-14D3K1545-03NO2ND