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EWG's Tap Water Database — 2019 UPDATE

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Cyanide

Los Angeles County WW District 4 & 34-Lancaster

Cyanide is a toxic chemical that causes central nervous system and thyroid toxicity. Water contamination is generally the result of metal mining and chemical industry waste, runoff from agriculture and road salts used for melting ice.

 

69

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND270ND
2013ND70ND
2014ND10ND
2015ND150ND
2016ND140ND
2017ND50ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 150 ppb

The EWG Health Guideline of 150 ppb for cyanide was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to the brain and nervous system.

EPA Maximum Contaminant
Level (MCL) 200 ppb

The legal limit for cyanide, established in 1992, was based on a 1955 toxicity study conducted in laboratory animals. This limit does not include any additional consideration of children’s health.

ppb = parts per billion

All test results

Date Lab ID Result
2012-04-105442-095-1130ND
2012-04-105442-094-1110ND
2012-04-105442-093-0751ND
2012-04-125442-054-1015ND
2012-04-125442-054-1030ND
2012-04-125442-053-1015ND
2012-04-125442-011-1040ND
2012-04-125442-036-0930ND
2012-04-305442-055-1130ND
2012-05-095442-026-1020ND
2012-05-095442-041-1000ND
2012-05-095442-045-1050ND
2012-05-175442-062-0917ND
2012-05-175442-063-0943ND
2012-05-175442-028-0848ND
2012-05-175442-048-0930ND
2012-06-075442-067-1110ND
2012-06-135442-071-1028ND
2012-06-135442-002-1054ND
2012-06-135442-070-1034ND
2012-06-135442-069-1030ND
2012-06-135442-037-0815ND
2012-06-215442-040-0932ND
2012-07-105442-023-0930ND
2012-07-265442-016-0930ND
2012-08-085442-055-1157ND
2012-09-055442-035-0941ND
2013-03-115442-067-0930ND
2013-04-035442-063-0835ND
2013-05-145442-036-0840ND
2013-10-215442-026-1020ND
2013-11-055442-048-0950ND
2013-11-055442-028-0830ND
2013-12-165442-026-0955ND
2014-05-215442-094-0825ND
2015-02-045442-016-1133ND
2015-04-015442-095-1030ND
2015-04-075442-093-0918ND
2015-05-055442-041-0917ND
2015-06-025442-071-1000ND
2015-06-025442-070-1010ND
2015-06-025442-069-1100ND
2015-06-025442-040-0758ND
2015-07-075442-045-0938ND
2015-07-095442-023-0931ND
2015-07-135442-035-0855ND
2015-08-185442-037-0930ND
2015-11-175442-068-1115ND
2015-11-175442-055-1005ND
2015-12-255442-062-0955ND
2016-01-255442-028-0840ND
2016-01-255442-048-0940ND
2016-02-095442-069-1010ND
2016-02-095442-070-1110ND
2016-02-095442-016-1028ND
2016-02-095442-068-1025ND
2016-02-105442-071-1125ND
2016-03-285442-067-0856ND
2016-03-285442-011-1138ND
2016-04-205442-041-0934ND
2016-04-205442-026-1016ND
2016-06-285442-054-1152ND
2016-09-135442-036-0950ND
2016-09-145442-053-1158ND
2017-11-219590-045-0935ND
2017-11-219590-055-0940ND
2017-11-219590-063-1010ND
2017-12-279590-063-1010ND
2017-12-279590-094-0910ND