Know Your Environment. Protect Your Health.

Nitrite

CTWC - Shoreline Region-Guilford 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.

 

127

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND150ND
2019ND230ND
2020ND240ND
2021ND190ND
2022ND210ND
2023ND250ND

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
2018-01-16BZ73475NOXND
2018-03-30CA11466NOXND
2018-06-04CA63507NOXND
2018-06-13CA69714NOXND
2018-06-13CA69718NOXND
2018-06-13CA69716NOXND
2018-06-13CA69715NOXND
2018-06-13CA69717NOXND
2018-06-20CA75544NOXND
2018-09-19NOX 200506169ND
2018-10-09NOX 200508367ND
2018-11-08NOX 200512198ND
2018-11-21NOX 200513547ND
2018-11-26NOX 200513931ND
2018-12-10NOX 200515324ND
2019-01-07NOX 200517748ND
2019-01-30NOX 200520057ND
2019-02-06NOX 200520859ND
2019-02-07NOX 200521039ND
2019-03-05NOX 200523518ND
2019-04-02NOX 200526702ND
2019-04-08NOX 200527439ND
2019-05-06NOX 200530919ND
2019-06-05NOX 200535054ND
2019-06-24NOX 200537625ND
2019-07-09NOX 200539960ND
2019-07-10NOX 200539996ND
2019-07-10NOX 200539998ND
2019-07-16NOX 200541091ND
2019-07-16NOX 200540648ND
2019-07-16NOX 200540644ND
2019-08-05NOX 200545065ND
2019-09-11NOX 200548435ND
2019-09-17NOX 200549238ND
2019-09-18NOX 200549465ND
2019-10-02NOX 200551087ND
2019-11-12NOX 200556637ND
2019-12-05NOX 200559108ND
2020-01-09NOX 200562365ND
2020-01-20NOX 200563509ND
2020-01-20NOX 200563521ND
2020-01-21NOX 200563499ND
2020-01-21NOX 200563515ND
2020-01-21NOX 200563516ND
2020-01-28NOX 200564211ND
2020-01-28NOX 200564212ND
2020-02-10NOX 200565531ND
2020-02-11NOX 200565799ND
2020-02-11NOX 200565797ND
2020-02-25NOX 200567275ND
2020-02-25NOX 200567276ND
2020-03-03NOX 200567975ND
2020-04-06NOX 200572489ND
2020-05-05NOX 200574587ND
2020-06-02NOX 200577714ND
2020-07-08NOX 200582000ND
2020-07-13NOX 200582477ND
2020-08-12NOX 200586368ND
2020-09-15NOX 200590367ND
2020-10-21NOX 200595066ND
2020-11-02NOX 200596424ND
2020-12-09NOX 200600816ND
2021-01-05NOX 200602753ND
2021-01-06NOX 200602994ND
2021-01-11NOX 200603457ND
2021-01-25NOX 200604768ND
2021-02-17NOX 200607136ND
2021-03-01NOX 200608135ND
2021-04-20NOX 200613997ND
2021-05-12NOX 200616876ND
2021-06-02NOX 200619284ND
2021-06-29NOX 200622710ND
2021-07-01NOX 200622841ND
2021-07-07NOX 200623650ND
2021-07-20NOX 200625447ND
2021-08-09NOX 200627644ND
2021-09-21300064946 300064949ND
2021-10-04N300073657 300073660ND
2021-11-01N300093127 300093130ND
2021-11-15N300102725 300102726ND
2021-12-08N300115259 300115262ND
2022-01-11CK14095ND
2022-01-11CK14105ND
2022-01-27CK24307ND
2022-02-15CK68298ND
2022-02-28CK76192ND
2022-03-07CK80900ND
2022-03-28CK96121ND
2022-04-25CL16306ND
2022-05-11CL27611ND
2022-06-06CL49387ND
2022-06-14CL56476ND
2022-07-20CL83807ND
2022-08-15CM05635ND
2022-08-15CM05636ND
2022-08-24CM14827ND
2022-08-29CM17830ND
2022-09-28CM43103ND
2022-10-04CM49564ND
2022-11-02CM75295ND
2022-12-01CM94640ND
2022-12-01CM94644ND
2023-01-04CN17497ND
2023-01-05CN17020ND
2023-01-09CN19603ND
2023-01-10CN20798ND
2023-02-08CN39378ND
2023-02-13CN41858ND
2023-03-13CN59172ND
2023-04-05CN77492ND
2023-05-10CO03350ND
2023-06-05CO19978ND
2023-06-13CO27277ND
2023-08-10CO71352ND
2023-08-28CO85102ND
2023-09-05CO90692ND
2023-09-12CO95874ND
2023-09-12CO95875ND
2023-09-12CO95877ND
2023-10-12CP23629ND
2023-10-23CP31868ND
2023-11-06CP42068ND
2023-11-28CP55321ND
2023-11-28CP55320ND
2023-11-29CP56432ND
2023-11-29CP56434ND
2023-12-04CP59688ND