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EWG's Tap Water Database — 2019 UPDATE

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Nitrite

Los Angeles Department of Water and Power

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.

 

208

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND90ND
2013ND90ND
2014ND390ND
2015ND440ND
2016ND460ND
2017ND610ND

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
2012-01-181200-205-1200ND
2012-02-021200-133-1000ND
2012-02-141200-011-1020ND
2012-05-171200-011-0900ND
2012-05-221200-133-1045ND
2012-08-141200-011-1200ND
2012-08-141200-133-1030ND
2012-11-131200-011-1035ND
2012-11-131200-133-0840ND
2013-02-201200-133-1200ND
2013-03-201200-011-1050ND
2013-05-091200-011-1025ND
2013-05-091200-133-0825ND
2013-08-131200-011-1235ND
2013-08-131200-133-1040ND
2013-10-081200-205-1145ND
2013-11-191200-011-1045ND
2013-11-191200-133-0800ND
2014-02-261200-011-1215ND
2014-02-261200-133-1215ND
2014-04-241200-133-0635ND
2014-05-011200-133-0725ND
2014-05-141200-011-1115ND
2014-05-141200-133-1105ND
2014-05-151200-133-0635ND
2014-05-291200-133-0735ND
2014-06-121200-133-1000ND
2014-06-191200-133-1000ND
2014-06-261200-133-0800ND
2014-07-031200-133-1155ND
2014-07-101200-133-1045ND
2014-07-171200-133-0800ND
2014-07-241200-133-1115ND
2014-07-311200-133-0750ND
2014-08-071200-133-0750ND
2014-08-121200-011-1030ND
2014-08-141200-133-0740ND
2014-08-201200-133-0900ND
2014-08-211200-133-0735ND
2014-08-281200-133-0725ND
2014-09-041200-133-0705ND
2014-09-111200-133-0720ND
2014-09-181200-133-0650ND
2014-09-251200-133-0645ND
2014-10-021200-133-0700ND
2014-10-091200-133-0740ND
2014-10-161200-133-0635ND
2014-10-231200-133-0645ND
2014-10-301200-133-0715ND
2014-11-061200-133-0620ND
2014-11-121200-011-1240ND
2014-11-131200-133-0645ND
2014-11-181200-133-0935ND
2014-11-201200-133-0700ND
2014-11-261200-133-1100ND
2014-12-111200-133-0655ND
2014-12-261200-133-1015ND
2015-01-081200-133-1030ND
2015-01-221200-133-1000ND
2015-02-051200-133-1030ND
2015-02-111200-133-0825ND
2015-02-191200-011-0845ND
2015-02-191200-133-0740ND
2015-03-051200-133-0710ND
2015-03-191200-133-0755ND
2015-04-021200-133-0640ND
2015-04-161200-133-0655ND
2015-04-301200-133-0740ND
2015-05-141200-133-0800ND
2015-05-191200-011-0900ND
2015-05-191200-133-1100ND
2015-05-281200-133-0845ND
2015-06-111200-133-0820ND
2015-06-251200-133-0750ND
2015-08-041200-011-1040ND
2015-08-041200-133-0645ND
2015-08-061200-133-1000ND
2015-08-131200-133-0945ND
2015-08-201200-133-1020ND
2015-08-271200-133-1210ND
2015-09-031200-133-0725ND
2015-09-101200-133-0740ND
2015-09-171200-133-0745ND
2015-09-241200-133-0725ND
2015-10-011200-133-0725ND
2015-10-081200-133-0725ND
2015-10-151200-133-0710ND
2015-10-201200-205-1155ND
2015-10-221200-133-1200ND
2015-10-291200-133-1130ND
2015-11-051200-011-1005ND
2015-11-051200-133-0755ND
2015-11-051200-133-1100ND
2015-11-121200-133-1130ND
2015-11-191200-133-1045ND
2015-11-251200-133-0720ND
2015-12-031200-133-0700ND
2015-12-101200-133-0650ND
2015-12-171200-133-0715ND
2015-12-231200-133-0650ND
2015-12-311200-133-0650ND
2016-01-071200-133-0810ND
2016-01-211200-133-0710ND
2016-02-241200-011-1215ND
2016-03-031200-133-0700ND
2016-03-171200-133-0900ND
2016-03-311200-133-0725ND
2016-04-141200-133-1100ND
2016-04-281200-133-1130ND
2016-05-121200-133-1100ND
2016-05-251200-011-1135ND
2016-05-251200-133-1210ND
2016-05-261200-133-0655ND
2016-06-091200-133-0645ND
2016-06-161200-133-0650ND
2016-06-231200-133-1050ND
2016-06-301200-133-0645ND
2016-07-071200-133-0645ND
2016-07-141200-133-0645ND
2016-07-211200-205-1225ND
2016-07-281200-133-0815ND
2016-08-041200-133-0645ND
2016-08-111200-133-0645ND
2016-08-171200-011-1010ND
2016-08-181200-133-1220ND
2016-08-231200-133-1005ND
2016-08-251200-133-1130ND
2016-09-011200-133-1100ND
2016-09-081200-133-1130ND
2016-09-151200-133-1300ND
2016-09-221200-133-1200ND
2016-09-291200-133-1220ND
2016-10-061200-133-0710ND
2016-10-131200-133-0800ND
2016-10-201200-133-1200ND
2016-10-271200-133-1050ND
2016-11-031200-133-1300ND
2016-11-101200-133-0830ND
2016-11-171200-133-0720ND
2016-11-211200-133-1115ND
2016-11-231200-133-0725ND
2016-11-291200-011-0845ND
2016-12-011200-133-0735ND
2016-12-081200-133-0720ND
2016-12-151200-133-0705ND
2016-12-221200-133-0640ND
2016-12-291200-133-1205ND
2017-01-051200-133-0740ND
2017-01-121200-133-0730ND
2017-01-191200-133-0735ND
2017-01-261200-133-0850ND
2017-02-021200-133-0705ND
2017-02-091200-133-0710ND
2017-02-161200-133-0710ND
2017-02-211200-011-1140ND
2017-02-211200-133-1210ND
2017-02-231200-133-0735ND
2017-03-021200-133-0810ND
2017-03-091200-133-0720ND
2017-03-161200-133-0730ND
2017-03-231200-133-0830ND
2017-03-301200-133-0714ND
2017-04-061200-133-0725ND
2017-04-131200-133-0653ND
2017-04-201200-133-0713ND
2017-04-271200-133-0705ND
2017-05-041200-133-1200ND
2017-05-091200-011-0940ND
2017-05-111200-133-1108ND
2017-05-171200-133-0941ND
2017-05-181200-133-1106ND
2017-05-251200-133-1100ND
2017-06-011200-133-0940ND
2017-06-081200-133-1206ND
2017-06-151200-133-0645ND
2017-06-221200-133-0711ND
2017-06-291200-133-0642ND
2017-07-061200-133-0803ND
2017-07-121200-205-1000ND
2017-07-131200-133-0808ND
2017-07-201200-133-0859ND
2017-07-271200-133-0800ND
2017-08-011200-133-0940ND
2017-08-031200-133-0817ND
2017-08-101200-133-1310ND
2017-08-171200-133-0737ND
2017-08-211200-011-1010ND
2017-08-241200-133-0740ND
2017-08-311200-133-1146ND
2017-09-071200-133-0818ND
2017-09-141200-133-0857ND
2017-09-211200-133-0749ND
2017-09-281200-133-0752ND
2017-10-051200-133-0753ND
2017-10-121200-133-0751ND
2017-10-191200-133-1134ND
2017-10-261200-133-0732ND
2017-11-021200-133-0753ND
2017-11-091200-133-0810ND
2017-11-161200-133-0740ND
2017-11-201200-011-1000ND
2017-11-201200-133-1040ND
2017-11-201200-133-1410ND
2017-11-301200-133-0717ND
2017-12-071200-133-0651ND
2017-12-141200-133-0936ND
2017-12-211200-133-0920ND
2017-12-281200-133-0738ND