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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Citizens Water - Indianapolis

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.

MORE ABOUT THIS CONTAMINANT

 

96

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND290ND
2015ND150ND
2016ND160ND
2017ND170ND
2018ND100ND
2019ND90ND

ppm = parts per million

State and national drinking water standards and health guidelines

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
2014-02-12670869NND
2014-02-12670874NND
2014-02-12670872NND
2014-02-12670859NND
2014-02-12670857NND
2014-02-12670855NND
2014-02-12670853NND
2014-05-14683186NND
2014-05-14683180NND
2014-05-14683182NND
2014-05-14683184NND
2014-05-14683190NND
2014-05-14683192NND
2014-05-14683194NND
2014-08-13696774-08NND
2014-08-13696772-07NND
2014-08-13696770-06NND
2014-08-13696768-05NND
2014-08-13696766-04NND
2014-08-13696764-03NND
2014-08-13696762-02NND
2014-08-13696760-01NND
2014-11-12710030NND
2014-11-12710028NND
2014-11-12710026NND
2014-11-12710022NND
2014-11-12710020NND
2014-11-12710018NND
2014-11-12710016NND
2015-02-11722648-05NND
2015-02-11722640-01NND
2015-02-11722642-02NND
2015-02-11722644-04NND
2015-02-11722650-06NND
2015-02-11722652-07NND
2015-11-09150100708NND
2015-11-09150100706NND
2015-11-09150100704NND
2015-11-09150100702NND
2015-11-10150102308NND
2015-11-11150102911NND
2015-11-11150102910NND
2015-11-11150102912NND
2015-11-11150102913NND
2016-05-1116067304NND
2016-05-1116067302NND
2016-05-1116067026NND
2016-05-1116067021NND
2016-05-1116067014NND
2016-05-1116067007NND
2016-05-1116066622NND
2016-08-0916122502NND
2016-08-0916121409NND
2016-08-0916121404NND
2016-08-0916121403NND
2016-08-0916121402NND
2016-08-0916121401NND
2016-08-1016122506NND
2016-08-1016122508NND
2016-08-1016122514NND
2017-05-0917070705NND
2017-05-0917070707NND
2017-05-0917070709NND
2017-05-0917070719NND
2017-05-0917070703NND
2017-05-1017071405NND
2017-05-1017071403NND
2017-05-1017071401NND
2017-08-1517130610ND
2017-08-1617130605ND
2017-08-1617130607ND
2017-08-1617130606ND
2017-08-1617130604ND
2017-08-1617130603ND
2017-08-1617130602ND
2017-08-1617130601ND
2017-08-1617130608ND
2018-08-1418127710NND
2018-08-1552490004ND
2018-08-1518128108NND
2018-08-1518128107NND
2018-08-1518128106NND
2018-08-1518128105NND
2018-08-1518128104NND
2018-08-1518128101NND
2018-08-1518128102NND
2018-08-1518128103NND
2019-05-1419092612NND
2019-05-1519092602NND
2019-05-1519092607NND
2019-05-1519092606NND
2019-05-1519092605NND
2019-05-1519092604NND
2019-05-1519092603NND
2019-05-1519092601NND
2019-08-1419169103NND