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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Alameda County Water District

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
2014ND150ND
2015ND170ND
2016ND160ND
2017ND160ND
2018ND160ND
2019ND160ND

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
2014-03-045401-038-0925ND
2014-03-045401-053-0955ND
2014-03-045401-041-0930ND
2014-03-045401-040-0845ND
2014-04-295401-053-1025ND
2014-04-295401-038-1005ND
2014-04-295401-041-1000ND
2014-07-215401-041-0955ND
2014-07-215401-038-0955ND
2014-07-225401-053-0905ND
2014-07-225401-040-0925ND
2014-10-145401-053-1145ND
2014-10-145401-038-1000ND
2014-10-145401-040-0900ND
2014-10-145401-041-1025ND
2015-01-275401-038-0955ND
2015-01-275401-053-1047ND
2015-01-275401-041-0945ND
2015-01-275401-040-1015ND
2015-04-215401-038-0945ND
2015-04-215401-040-0910ND
2015-04-215401-053-1010ND
2015-04-215401-041-0935ND
2015-06-095401-015-1120ND
2015-07-065401-038-1000ND
2015-07-065401-041-0921ND
2015-07-065401-040-1105ND
2015-07-215401-053-0905ND
2015-10-205401-041-1025ND
2015-10-205401-038-1035ND
2015-10-205401-053-1115ND
2015-10-205401-040-0940ND
2016-01-195401-040-1035ND
2016-01-195401-038-0855ND
2016-01-195401-041-0910ND
2016-01-195401-053-0935ND
2016-04-265401-040-0945ND
2016-04-265401-038-1035ND
2016-04-265401-041-1025ND
2016-05-105401-053-0915ND
2016-07-115401-041-0820ND
2016-07-115401-038-0850ND
2016-07-195401-040-0825ND
2016-07-195401-053-0955ND
2016-10-045401-053-0925ND
2016-10-045401-041-0855ND
2016-10-045401-040-0825ND
2016-10-045401-038-0905ND
2017-01-175401-053-1025ND
2017-01-175401-041-0925ND
2017-01-175401-040-0937ND
2017-01-175401-038-0925ND
2017-04-185401-041-0910ND
2017-04-185401-053-0948ND
2017-04-185401-038-0925ND
2017-04-185401-040-0820ND
2017-07-175401-038-1030ND
2017-07-175401-041-1005ND
2017-07-255401-053-1032ND
2017-07-255401-040-0915ND
2017-10-035401-053-0958ND
2017-10-035401-041-0925ND
2017-10-035401-040-0857ND
2017-10-035401-038-0915ND
2018-01-165401-053-1050ND
2018-01-165401-040-0920ND
2018-01-165401-038-1110ND
2018-01-165401-041-1025ND
2018-04-175401-040-0835ND
2018-04-175401-053-1003ND
2018-04-175401-038-0926ND
2018-04-175401-041-0939ND
2018-07-115401-041-0755ND
2018-07-115401-038-0726ND
2018-07-175401-040-0850ND
2018-07-175401-053-0845ND
2018-10-165401-053-1035ND
2018-10-165401-040-0820ND
2018-10-165401-038-0950ND
2018-10-165401-041-1005ND
2019-02-055401-041-0930ND
2019-02-055401-053-1000ND
2019-02-055401-038-0940ND
2019-02-055401-040-0820ND
2019-05-135401-053-0955ND
2019-05-145401-041-0915ND
2019-05-145401-040-0815ND
2019-05-145401-038-0900ND
2019-07-165401-053-1030ND
2019-07-165401-041-1000ND
2019-07-165401-038-0935ND
2019-07-165401-040-0755ND
2019-10-155401-053-1000ND
2019-10-155401-041-0910ND
2019-10-155401-040-0825ND
2019-10-155401-038-0925ND