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EWG's Tap Water Database — 2019 UPDATE

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Nitrite

Los Angeles County WW District 4 & 34-Lancaster

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.

 

54

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND260ND
2014N/A00N/A
2015N/A00N/A
2016ND240ND
2017ND20ND

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
2012-01-245442-054-0937ND
2012-04-125442-054-1015ND
2013-03-115442-028-1205ND
2013-03-115442-016-1140ND
2013-03-115442-011-0931ND
2013-03-115442-023-1045ND
2013-03-115442-062-1130ND
2013-03-125442-036-1106ND
2013-03-135442-035-1159ND
2013-03-135442-035-0852ND
2013-03-195442-026-0925ND
2013-03-195442-093-0844ND
2013-03-195442-002-1135ND
2013-03-195442-053-0949ND
2013-03-195442-054-0943ND
2013-04-035442-063-0835ND
2013-04-095442-070-0945ND
2013-04-115442-055-1022ND
2013-05-215442-040-0908ND
2013-06-045442-041-0910ND
2013-06-045442-048-0934ND
2013-06-125442-095-0859ND
2013-06-125442-094-0833ND
2013-07-165442-045-1050ND
2013-07-175442-067-1050ND
2013-07-235442-071-1047ND
2013-07-245442-069-1002ND
2013-07-295442-037-0951ND
2016-01-195442-040-0945ND
2016-01-195442-035-0950ND
2016-01-255442-048-0940ND
2016-01-255442-028-0840ND
2016-01-255442-062-0930ND
2016-01-265442-093-1100ND
2016-02-095442-070-1110ND
2016-02-095442-069-1010ND
2016-02-095442-016-1028ND
2016-02-095442-068-1025ND
2016-02-105442-071-1125ND
2016-03-285442-055-1126ND
2016-03-285442-011-1138ND
2016-03-285442-067-0856ND
2016-04-205442-026-1016ND
2016-04-205442-041-0934ND
2016-06-085442-036-0945ND
2016-06-275442-094-1125ND
2016-06-285442-054-1152ND
2016-09-275442-023-0856ND
2016-11-095442-095-1035ND
2016-11-165442-037-1150ND
2016-11-165442-053-1059ND
2016-12-275442-095-1149ND
2017-11-219590-045-0935ND
2017-12-279590-063-1010ND