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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Crescenta Valley CWD

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

 

65

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND110ND
2015ND110ND
2016ND120ND
2017ND120ND
2018ND10ND
2019ND180ND

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
2014-08-055806-013-1156ND
2014-08-055806-001-1130ND
2014-08-055806-002-1056ND
2014-08-055806-005-1135ND
2014-08-055806-006-1320ND
2014-08-055806-007-1030ND
2014-08-055806-009-1030ND
2014-08-055806-010-1340ND
2014-08-055806-011-0950ND
2014-08-055806-012-1245ND
2014-09-165806-008-0908ND
2015-05-055806-011-1101ND
2015-05-055806-013-1255ND
2015-05-055806-012-1318ND
2015-05-055806-001-1120ND
2015-05-055806-010-1319ND
2015-05-055806-009-1028ND
2015-05-055806-008-1243ND
2015-05-055806-002-1157ND
2015-05-055806-005-1215ND
2015-05-055806-006-1302ND
2015-05-055806-007-1128ND
2016-05-035806-013-1240ND
2016-05-035806-001-1048ND
2016-05-035806-002-1225ND
2016-05-035806-005-1210ND
2016-05-035806-027-1215ND
2016-05-035806-006-1323ND
2016-05-035806-011-1150ND
2016-05-035806-009-1101ND
2016-05-035806-010-1301ND
2016-05-035806-007-1110ND
2016-05-035806-008-1300ND
2016-06-075806-012-1110ND
2017-02-215806-012-1245ND
2017-02-215806-005-1100ND
2017-02-215806-027-0914ND
2017-02-215806-013-0941ND
2017-02-215806-002-1125ND
2017-02-215806-009-1013ND
2017-02-215806-001-1125ND
2017-02-215806-011-1145ND
2017-02-215806-006-1308ND
2017-02-215806-007-1030ND
2017-02-215806-010-1250ND
2017-07-265806-008-0800ND
2018-02-065806-010-1248ND
2019-02-125806-013-1130ND
2019-02-125806-010-1215ND
2019-02-125806-011-0841ND
2019-02-125806-001-1021ND
2019-02-125806-009-0854ND
2019-02-125806-012-1225ND
2019-02-125806-007-1005ND
2019-02-125806-002-0950ND
2019-02-125806-008-1150ND
2019-02-125806-027-1205ND
2019-02-125806-005-1015ND
2019-06-255806-028-0958ND
2019-07-025806-028-1225ND
2019-08-065806-028-1001ND
2019-09-035806-028-1240ND
2019-10-015806-028-1123ND
2019-11-045806-028-1227ND
2019-12-035806-028-1154ND