Know Your Environment. Protect Your Health.

Nitrite

Connecticut Water Company - Northern Region-Western 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.

 

78

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND120ND
2019ND110ND
2020ND150ND
2021ND110ND
2022ND160ND
2023ND130ND

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
2018-01-12BZ72527NOXND
2018-01-12BZ72529NOXND
2018-01-12BZ72528NOXND
2018-01-23BZ78886NOXND
2018-01-23BZ78887NOXND
2018-01-31BZ82949NOXND
2018-03-02BZ97488NOXND
2018-04-19CA23517NOXND
2018-07-12CA89150ND
2018-07-13CA89903ND
2018-07-20CA94720ND
2018-12-10NOX 200515418ND
2019-01-02NOX 200517305ND
2019-01-15NOX 200518779ND
2019-03-15NOX 200524883ND
2019-03-22NOX 200525613ND
2019-03-22NOX 200525612ND
2019-05-30NOX 200534244ND
2019-05-30NOX 200534243ND
2019-07-02NOX 200538782ND
2019-07-02NOX 200538771ND
2019-07-18NOX 200541147ND
2019-10-03NOX 200551371ND
2020-01-02NOX 200561503ND
2020-01-09NOX 200562368ND
2020-03-24NOX 200570369ND
2020-06-10NOX 200578804ND
2020-06-24200580453ND
2020-08-12NOX 200586388ND
2020-08-12200586387ND
2020-08-14CG54062ND
2020-09-09NOX 200589664ND
2020-09-14NOX 200590110ND
2020-09-14NOX 200590117ND
2020-09-14NOX 200590123ND
2020-09-14NOX 200590125ND
2020-09-14NOX 200590114ND
2020-10-07NOX 200593169ND
2021-01-07NOX 200603066ND
2021-02-17NOX 200607103ND
2021-03-05NOX 200608709ND
2021-04-12NOX 200612731ND
2021-06-07NOX 200619843ND
2021-06-07NOX 200621422ND
2021-06-07NOX 200619842ND
2021-07-07NOX 200623599ND
2021-09-14300059920 300059921ND
2021-09-14300059931 300059933ND
2021-10-05N300075495 300075496ND
2022-01-12CK15031ND
2022-01-12CK15030ND
2022-01-12CK15027ND
2022-01-24CK22294ND
2022-01-25CK23181ND
2022-01-25CK23176ND
2022-02-01CK27430ND
2022-02-16CK69357ND
2022-02-16CK69358ND
2022-06-08CL52210ND
2022-06-14CL56640ND
2022-06-15CL58007ND
2022-07-11CL74895ND
2022-09-08CM25672ND
2022-09-20CM37295ND
2022-11-03CM76613ND
2023-01-10CN19735ND
2023-01-10CN20742ND
2023-01-11CN20957ND
2023-01-18CN25096ND
2023-02-22CN47995ND
2023-02-22CN47869ND
2023-04-03CN74709ND
2023-04-11CN81219ND
2023-05-22CO11671ND
2023-07-05CO43797ND
2023-10-04CP17834ND
2023-10-31CP38331ND
2023-12-13CP67269ND