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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

City of Davis

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

 

81

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND180ND
2015ND160ND
2016ND160ND
2017ND120ND
2018ND110ND
2019ND80ND

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
2014-08-055810-052-0935ND
2014-08-055810-002-0822ND
2014-08-055810-004-0810ND
2014-08-055810-006-0837ND
2014-08-055810-009-1120ND
2014-08-055810-010-0918ND
2014-08-055810-014-0950ND
2014-08-055810-015-1036ND
2014-08-055810-016-0853ND
2014-08-055810-017-0909ND
2014-08-055810-018-0753ND
2014-08-055810-019-0737ND
2014-08-055810-020-0657ND
2014-08-055810-023-0720ND
2014-08-055810-024-1025ND
2014-08-055810-025-1000ND
2014-08-055810-026-1014ND
2014-08-055810-030-1059ND
2015-07-075810-004-1253ND
2015-07-075810-052-0648ND
2015-07-075810-030-0919ND
2015-07-075810-026-1041ND
2015-07-075810-025-0832ND
2015-07-075810-024-1120ND
2015-07-075810-023-0904ND
2015-07-075810-020-0757ND
2015-07-075810-002-1333ND
2015-07-075810-018-0721ND
2015-07-075810-006-1115ND
2015-07-075810-017-1030ND
2015-07-075810-010-1148ND
2015-07-075810-016-0957ND
2015-07-075810-015-1321ND
2015-07-215810-009-0747ND
2016-01-265810-019-1005ND
2016-07-135810-030-0844ND
2016-07-205810-026-0757ND
2016-07-205810-052-0843ND
2016-07-275810-015-0943ND
2016-07-275810-010-1021ND
2016-07-275810-016-0846ND
2016-07-275810-006-0817ND
2016-07-275810-017-1027ND
2016-07-275810-004-0750ND
2016-07-275810-018-0803ND
2016-07-275810-020-0836ND
2016-07-275810-019-0922ND
2016-07-275810-025-1009ND
2016-07-275810-024-0955ND
2016-07-275810-023-0855ND
2017-03-205810-057-1120ND
2017-06-145810-057-0820ND
2017-08-025810-052-1115ND
2017-08-025810-006-0859ND
2017-08-025810-019-0823ND
2017-08-025810-025-0925ND
2017-08-025810-018-0843ND
2017-08-025810-026-0943ND
2017-08-025810-020-0805ND
2017-08-035810-030-0625ND
2017-09-205810-057-0910ND
2017-12-125810-057-0735ND
2018-02-145810-057-0925ND
2018-04-185810-028-0855ND
2018-08-155810-019-0902ND
2018-08-155810-020-1001ND
2018-08-155810-018-0819ND
2018-08-155810-025-0755ND
2018-08-155810-057-0840ND
2018-08-155810-052-0930ND
2018-08-155810-028-0720ND
2018-08-155810-030-0640ND
2018-11-075810-028-0818ND
2019-08-079590-025-1102ND
2019-08-079590-028-1033ND
2019-08-079590-057-1200ND
2019-08-079590-052-1134ND
2019-08-079590-030-1008ND
2019-08-089590-018-1010ND
2019-08-089590-019-1033ND
2019-08-089590-020-1103ND