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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

California American Water Company - Antelope

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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34

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
2014N/A00N/A
2015ND170ND
2016N/A00N/A
2017N/A00N/A
2018ND160ND
2019ND10ND

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
2015-08-051225-003-1110ND
2015-08-051225-005-1222ND
2015-08-051225-006-0945ND
2015-08-101225-014-1125ND
2015-08-101225-013-1021ND
2015-08-101225-011-0855ND
2015-08-111225-001-0915ND
2015-08-111225-002-1236ND
2015-08-111225-004-1255ND
2015-08-111225-018-1145ND
2015-08-111225-007-0907ND
2015-08-111225-008-1014ND
2015-08-111225-009-1020ND
2015-08-121225-016-1050ND
2015-08-121225-010-0859ND
2015-08-131225-012-1100ND
2015-08-131225-017-0909ND
2018-08-071233-009-0900ND
2018-08-071233-010-1310ND
2018-08-071233-011-1120ND
2018-08-071233-012-1030ND
2018-08-071233-018-1210ND
2018-08-081233-017-1010ND
2018-08-081233-002-0920ND
2018-08-081233-016-1340ND
2018-08-091233-008-1020ND
2018-08-091233-007-1130ND
2018-08-141233-040-1040ND
2018-08-141233-014-1045ND
2018-08-141233-013-1220ND
2018-08-141233-006-1000ND
2018-08-141233-004-0830ND
2018-08-141233-003-1130ND
2019-05-161225-001-1320ND