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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Valley Water Company

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

 

218

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND370ND
2015ND400ND
2016ND280ND
2017ND350ND
2018ND460ND
2019ND320ND

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
2014-05-059590-006-1030ND
2014-05-129590-006-1020ND
2014-05-199590-006-0745ND
2014-05-279590-006-0830ND
2014-06-029590-006-0730ND
2014-06-099590-006-0800ND
2014-06-169590-006-0800ND
2014-06-239590-006-0730ND
2014-07-029588-002-0905ND
2014-07-029588-003-0920ND
2014-07-029588-004-0955ND
2014-07-029588-005-1025ND
2014-07-029590-006-0850ND
2014-07-029590-008-0910ND
2014-07-079590-006-0830ND
2014-07-149590-006-0745ND
2014-07-219590-006-0830ND
2014-07-289590-006-0830ND
2014-08-049590-006-0900ND
2014-08-049590-008-0845ND
2014-08-119590-006-0730ND
2014-08-189590-006-0815ND
2014-08-259590-006-0900ND
2014-09-029590-006-0900ND
2014-09-029590-008-0900ND
2014-09-039590-002-0810ND
2014-09-039590-003-0830ND
2014-09-099590-006-0800ND
2014-09-159590-006-0745ND
2014-09-229590-006-0830ND
2014-09-299590-006-0745ND
2014-10-069590-006-0730ND
2014-10-069590-008-0730ND
2014-10-079590-003-0915ND
2014-10-139590-006-0730ND
2014-10-209590-006-0800ND
2014-10-279590-006-0900ND
2015-04-069590-006-1125ND
2015-04-109590-002-1030ND
2015-04-139590-006-0900ND
2015-04-209590-006-0800ND
2015-04-279590-006-0825ND
2015-05-049590-006-0800ND
2015-05-089590-006-1445ND
2015-05-119590-006-0815ND
2015-05-189590-006-0920ND
2015-05-269590-006-0840ND
2015-06-049590-006-1345ND
2015-06-089590-006-1120ND
2015-06-159590-006-0815ND
2015-06-229590-006-0800ND
2015-06-299590-006-0815ND
2015-07-069590-006-1130ND
2015-07-139590-006-0730ND
2015-07-209590-006-0740ND
2015-07-279590-006-0845ND
2015-08-109590-006-1045ND
2015-08-179590-006-0800ND
2015-08-249590-006-0740ND
2015-08-319590-006-0815ND
2015-09-089590-006-0800ND
2015-09-109590-006-1330ND
2015-09-109590-008-1340ND
2015-09-149590-006-0810ND
2015-09-219590-006-1125ND
2015-09-289590-006-0810ND
2015-10-059590-002-0945ND
2015-10-059590-003-0850ND
2015-10-059590-006-0825ND
2015-10-059590-008-0815ND
2015-10-129590-006-1050ND
2015-10-199590-006-0830ND
2015-10-269590-006-0810ND
2015-11-029590-002-0915ND
2015-11-029590-003-0930ND
2015-11-029590-006-0955ND
2015-11-029590-008-0945ND
2016-03-019590-003-0810ND
2016-03-019590-006-0800ND
2016-04-049590-005-1215ND
2016-04-049590-006-1230ND
2016-04-119590-006-0800ND
2016-04-189590-006-0750ND
2016-04-259590-006-0825ND
2016-05-029590-006-0800ND
2016-05-049590-005-0815ND
2016-05-099590-006-0930ND
2016-05-169590-006-0845ND
2016-05-179590-006-1105ND
2016-05-239590-006-0800ND
2016-06-019590-006-0820ND
2016-07-059590-006-0830ND
2016-07-059590-008-0835ND
2016-07-119590-006-0815ND
2016-07-189590-006-0850ND
2016-07-259590-006-0815ND
2016-08-019590-006-0910ND
2016-08-089590-006-0815ND
2016-08-159590-006-0800ND
2016-08-299590-006-0820ND
2016-10-039590-006-0815ND
2016-10-039590-008-0820ND
2016-10-109590-006-0830ND
2016-10-189590-006-0815ND
2016-10-259590-006-0835ND
2017-05-159590-006-0940ND
2017-05-159590-008-0950ND
2017-05-199590-006-1230ND
2017-05-199590-008-1300ND
2017-05-229590-006-0830ND
2017-05-309590-006-0815ND
2017-07-059590-006-0900ND
2017-07-059590-008-0900ND
2017-07-109590-006-0855ND
2017-07-119588-002-0950ND
2017-07-119588-003-0935ND
2017-07-119588-005-1015ND
2017-07-139588-004-1145ND
2017-07-189590-006-0845ND
2017-07-249590-006-0800ND
2017-08-019590-006-0900ND
2017-08-019590-008-0850ND
2017-08-079590-006-0815ND
2017-08-149590-006-0820ND
2017-08-219590-006-0855ND
2017-08-289590-006-0815ND
2017-09-059590-006-0815ND
2017-09-059590-008-0820ND
2017-09-119590-006-1000ND
2017-09-189590-006-0800ND
2017-09-259590-006-0800ND
2017-10-029590-006-0815ND
2017-10-029590-008-0815ND
2017-10-039590-002-0745ND
2017-10-099590-006-0840ND
2017-10-169590-006-0810ND
2017-10-239590-006-0845ND
2017-10-309590-006-1010ND
2017-11-029590-002-0845ND
2017-11-029590-006-0920ND
2018-03-129590-002-1005ND
2018-03-129590-003-1050ND
2018-03-129590-004-0900ND
2018-03-129590-005-0930ND
2018-03-129590-006-1355ND
2018-03-199590-006-0900ND
2018-03-269590-006-1120ND
2018-05-039590-006-0745ND
2018-05-039590-008-0735ND
2018-05-079590-006-0750ND
2018-05-149590-006-0900ND
2018-05-229590-006-0905ND
2018-05-299590-006-1450ND
2018-06-049590-006-0800ND
2018-06-049590-008-0800ND
2018-06-119590-006-0800ND
2018-06-189590-006-0850ND
2018-06-259590-006-0800ND
2018-07-029590-006-0800ND
2018-07-029590-008-0800ND
2018-07-099590-006-0835ND
2018-07-169590-006-0825ND
2018-07-239590-006-0800ND
2018-07-309590-006-0830ND
2018-08-069590-006-0815ND
2018-08-069590-008-0830ND
2018-08-139590-006-0800ND
2018-08-209590-006-0745ND
2018-08-279590-006-0730ND
2018-09-049590-002-0930ND
2018-09-049590-006-0800ND
2018-09-049590-008-0800ND
2018-09-109590-006-0730ND
2018-09-179590-006-0800ND
2018-09-249590-006-0800ND
2018-10-019590-006-1100ND
2018-10-019590-008-1050ND
2018-10-039590-002-1010ND
2018-10-039590-003-1020ND
2018-10-089590-006-0815ND
2018-10-179590-006-0800ND
2018-10-229590-006-0800ND
2018-10-299590-006-0830ND
2018-11-059590-006-0800ND
2018-11-059590-008-0800ND
2018-11-129590-006-0800ND
2019-05-069590-006-1250ND
2019-05-069590-008-1315ND
2019-05-139590-006-0755ND
2019-05-209590-006-0800ND
2019-05-289590-006-0815ND
2019-06-039590-006-0840ND
2019-06-039590-008-0830ND
2019-06-109590-006-0800ND
2019-06-179590-006-0815ND
2019-06-249590-006-0835ND
2019-07-019590-006-0800ND
2019-07-019590-008-0800ND
2019-07-089590-006-0745ND
2019-07-159590-006-0845ND
2019-07-229590-006-0800ND
2019-07-299590-006-0820ND
2019-08-059590-006-0900ND
2019-08-059590-008-0855ND
2019-08-129590-006-0850ND
2019-08-199590-006-0855ND
2019-08-269590-006-0820ND
2019-09-039590-006-0800ND
2019-09-039590-008-0800ND
2019-09-099590-006-0912ND
2019-09-169590-006-0810ND
2019-09-239590-006-0840ND
2019-10-019590-006-0810ND
2019-10-029590-008-1015ND
2019-10-079590-006-0850ND
2019-10-149590-006-0815ND
2019-10-219590-006-0815ND
2019-10-289590-006-0840ND