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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

California Domestic 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

 

233

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND390ND
2015ND370ND
2016ND370ND
2017ND430ND
2018ND390ND
2019ND380ND

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
2014-01-063761-005-1000ND
2014-01-063761-018-1036ND
2014-02-033761-005-0925ND
2014-02-033761-018-1040ND
2014-03-033761-005-1005ND
2014-03-033761-018-1112ND
2014-03-219588-014-0910ND
2014-04-073761-004-0854ND
2014-04-073761-005-0939ND
2014-04-073761-006-0903ND
2014-04-073761-007-0921ND
2014-04-073761-008-0815ND
2014-04-073761-009-0735ND
2014-04-073761-014-1025ND
2014-04-073761-018-1037ND
2014-04-099588-004-1120ND
2014-04-099588-005-1115ND
2014-04-099588-006-1140ND
2014-04-099588-007-1130ND
2014-04-099588-008-1150ND
2014-04-093761-020-0721ND
2014-05-053761-005-0940ND
2014-05-053761-018-1025ND
2014-06-023761-005-0920ND
2014-06-023761-018-1017ND
2014-07-073761-005-0934ND
2014-07-073761-018-1057ND
2014-09-023761-005-1006ND
2014-09-023761-018-1125ND
2014-10-063761-004-0855ND
2014-10-063761-005-1024ND
2014-10-063761-006-0943ND
2014-10-063761-007-1000ND
2014-10-063761-008-0837ND
2014-10-063761-009-0750ND
2014-10-063761-018-1115ND
2014-12-013761-005-0816ND
2014-12-013761-018-0917ND
2014-12-163761-014-0905ND
2015-01-053761-005-1038ND
2015-01-053761-018-1155ND
2015-02-023761-005-1020ND
2015-02-023761-018-1130ND
2015-03-023761-005-1119ND
2015-03-023761-018-1110ND
2015-04-063761-004-0850ND
2015-04-063761-005-0555ND
2015-04-063761-006-0743ND
2015-04-063761-007-0757ND
2015-04-063761-008-0730ND
2015-04-063761-009-0525ND
2015-04-063761-014-0700ND
2015-04-063761-018-0645ND
2015-05-043761-005-1021ND
2015-05-043761-018-1120ND
2015-06-013761-005-0953ND
2015-06-013761-018-1050ND
2015-07-063761-005-1006ND
2015-07-063761-018-1123ND
2015-08-033761-005-1014ND
2015-08-033761-018-1140ND
2015-09-083761-005-1025ND
2015-09-083761-018-1117ND
2015-10-053761-004-0809ND
2015-10-053761-005-0943ND
2015-10-053761-006-0840ND
2015-10-053761-007-0921ND
2015-10-053761-008-0902ND
2015-10-053761-009-0725ND
2015-10-053761-014-1029ND
2015-10-053761-018-1035ND
2015-11-023761-005-0957ND
2015-11-023761-018-1110ND
2015-11-199588-020-1055ND
2015-12-073761-005-1018ND
2015-12-073761-018-1141ND
2016-01-123761-005-0847ND
2016-01-123761-018-0945ND
2016-02-013761-005-1043ND
2016-02-013761-018-1108ND
2016-03-083761-005-0940ND
2016-03-233761-018-0955ND
2016-04-043761-004-0915ND
2016-04-043761-005-1030ND
2016-04-043761-006-1015ND
2016-04-043761-007-0958ND
2016-04-043761-008-0852ND
2016-04-043761-009-0745ND
2016-04-043761-014-1140ND
2016-04-043761-018-1152ND
2016-05-023761-005-1008ND
2016-05-023761-018-1135ND
2016-06-063761-005-1014ND
2016-06-063761-018-1115ND
2016-07-053761-005-0925ND
2016-07-053761-018-1122ND
2016-08-013761-005-0925ND
2016-08-013761-018-1055ND
2016-09-063761-005-1021ND
2016-09-063761-018-1136ND
2016-10-033761-004-0829ND
2016-10-033761-005-0948ND
2016-10-033761-006-0903ND
2016-10-033761-007-0924ND
2016-10-033761-008-0813ND
2016-10-033761-009-0729ND
2016-10-033761-014-1107ND
2016-10-033761-018-1115ND
2016-10-033761-020-1004ND
2016-11-073761-005-1116ND
2016-11-073761-018-1111ND
2016-12-053761-005-0944ND
2016-12-053761-018-1046ND
2017-01-033761-005-0927ND
2017-01-033761-018-1021ND
2017-01-109588-014-0900ND
2017-02-083761-005-1012ND
2017-02-083761-018-1040ND
2017-03-063761-005-1014ND
2017-03-063761-018-1118ND
2017-04-033761-004-0915ND
2017-04-033761-005-1015ND
2017-04-033761-006-0937ND
2017-04-033761-007-0954ND
2017-04-033761-008-0834ND
2017-04-033761-009-0748ND
2017-04-033761-014-1135ND
2017-04-033761-018-1142ND
2017-04-033761-020-1031ND
2017-04-059588-004-0920ND
2017-04-059588-005-0905ND
2017-04-059588-006-0930ND
2017-04-059588-007-0940ND
2017-04-059588-008-0955ND
2017-05-083761-005-0957ND
2017-05-083761-018-1030ND
2017-06-053761-005-1014ND
2017-06-053761-018-1119ND
2017-07-053761-005-0955ND
2017-07-053761-018-1052ND
2017-08-073761-005-1006ND
2017-08-073761-018-1144ND
2017-09-263761-009-0930ND
2017-10-023761-004-0837ND
2017-10-023761-005-0919ND
2017-10-023761-006-1003ND
2017-10-023761-007-0940ND
2017-10-023761-008-0815ND
2017-10-023761-009-0729ND
2017-10-023761-014-1115ND
2017-10-023761-018-1128ND
2017-10-023761-020-1020ND
2017-11-063761-005-1010ND
2017-11-063761-018-1110ND
2017-12-043761-005-1012ND
2017-12-043761-018-1058ND
2018-01-023761-005-1025ND
2018-01-023761-018-1130ND
2018-02-053761-005-0912ND
2018-02-053761-018-0930ND
2018-03-053761-005-1002ND
2018-03-053761-018-1150ND
2018-04-023761-004-0900ND
2018-04-023761-005-1038ND
2018-04-023761-006-0950ND
2018-04-023761-007-1018ND
2018-04-023761-008-0931ND
2018-04-023761-009-0757ND
2018-04-023761-014-1150ND
2018-04-023761-018-1157ND
2018-04-023761-020-1054ND
2018-05-073761-005-1013ND
2018-05-073761-018-1107ND
2018-06-043761-005-1021ND
2018-06-053761-018-0845ND
2018-07-023761-005-1023ND
2018-07-023761-018-1131ND
2018-08-063761-005-1055ND
2018-08-063761-018-1136ND
2018-09-043761-005-1106ND
2018-09-043761-018-1205ND
2018-10-013761-005-1029ND
2018-10-013761-006-0958ND
2018-10-013761-007-0940ND
2018-10-013761-008-0822ND
2018-10-013761-009-0740ND
2018-10-013761-014-1127ND
2018-10-013761-018-1132ND
2018-10-013761-020-1015ND
2018-10-043761-004-0815ND
2018-10-099588-020-0910ND
2018-11-053761-005-1017ND
2018-11-053761-018-1126ND
2018-12-033761-005-1036ND
2018-12-033761-018-1137ND
2019-01-083761-005-1021ND
2019-01-083761-018-1050ND
2019-02-043761-005-1026ND
2019-02-043761-018-1144ND
2019-03-043761-005-1041ND
2019-03-043761-018-1158ND
2019-04-013761-005-1131ND
2019-04-013761-006-0956ND
2019-04-013761-007-0941ND
2019-04-013761-008-0840ND
2019-04-013761-009-0814ND
2019-04-013761-014-1125ND
2019-04-013761-018-1130ND
2019-04-013761-020-1115ND
2019-04-083761-004-0920ND
2019-05-063761-005-0726ND
2019-05-063761-018-0721ND
2019-06-033761-005-1027ND
2019-06-033761-018-1122ND
2019-07-013761-005-0957ND
2019-07-013761-018-1038ND
2019-08-053761-005-1027ND
2019-08-053761-018-1135ND
2019-09-033761-005-0637ND
2019-09-033761-018-0850ND
2019-10-073761-004-0919ND
2019-10-073761-005-1055ND
2019-10-073761-006-1118ND
2019-10-073761-007-1130ND
2019-10-073761-008-0843ND
2019-10-073761-009-0800ND
2019-10-073761-014-0958ND
2019-10-073761-018-1015ND
2019-10-073761-020-1002ND
2019-11-043761-005-1031ND
2019-11-043761-018-1116ND
2019-12-023761-005-1030ND
2019-12-023761-018-1112ND