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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Kalaheo-Koloa

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.

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61

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND100ND
2015ND90ND
2016ND80ND
2017ND90ND
2018ND120ND
2019ND130ND

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
2014-03-31C14-04-0005ND
2014-03-31C14-04-0004ND
2014-03-31C14-04-0013ND
2014-03-31C14-04-0012ND
2014-03-31C14-04-0011ND
2014-03-31C14-04-0010ND
2014-03-31C14-04-0009ND
2014-03-31C14-04-0008ND
2014-03-31C14-04-0007ND
2014-03-31C14-04-0006ND
2015-07-08C15-07-0203ND
2015-07-08C15-07-0204ND
2015-07-08C15-07-0205ND
2015-07-08C15-07-0206ND
2015-11-30C15-12-0004ND
2015-11-30C15-12-0005ND
2015-11-30C15-12-0006ND
2015-11-30C15-12-0007ND
2015-11-30C15-12-0008ND
2016-06-27ND
2016-06-27ND
2016-06-27ND
2016-06-29ND
2016-06-29ND
2016-06-29ND
2016-06-29ND
2016-06-29ND
2017-03-13ND
2017-03-13ND
2017-03-13ND
2017-03-13ND
2017-03-15ND
2017-03-15ND
2017-03-15ND
2017-03-15ND
2017-05-23ND
2018-01-29201801000000ND
2018-01-29201801310036ND
2018-04-18C18-04-0155ND
2018-04-18C18-04-0156ND
2018-04-18C18-04-0157ND
2018-04-18C18-04-0154ND
2018-04-18C18-04-0158ND
2018-06-04C18-06-0005ND
2018-06-04C18-06-0004ND
2018-06-05C18-06-0021ND
2018-06-05C18-06-0023ND
2018-06-05C18-06-0022ND
2019-01-30201901310193ND
2019-04-16C19-04-0108ND
2019-04-16C19-04-0109ND
2019-04-16C19-04-0107ND
2019-04-16C19-04-0105ND
2019-04-16C19-04-0104ND
2019-05-13C19-05-0051ND
2019-05-13C19-05-0052ND
2019-05-13C19-05-0053ND
2019-05-13C19-05-0049ND
2019-05-13C19-05-0050ND
2019-07-17C19-07-0159ND
2019-10-21C19-10-0066ND