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EWG's Tap Water Database — 2019 UPDATE

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Cyanide

East Bay Municipal Utility District

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.

 

42

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND60ND
2013ND60ND
2014ND60ND
2015ND80ND
2016ND70ND
2017ND90ND

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
2012-06-268201-009-0915ND
2012-07-108201-012-0800ND
2012-07-108201-004-0648ND
2012-07-178201-005-0905ND
2012-07-188201-005-1350ND
2012-07-188201-011-0853ND
2013-03-198201-011-0820ND
2013-07-118201-005-1025ND
2013-07-158201-005-1235ND
2013-07-238201-009-1030ND
2013-07-238201-012-0839ND
2013-07-238201-004-0745ND
2014-04-088201-011-0820ND
2014-04-238201-005-0720ND
2014-06-168201-009-0915ND
2014-06-178201-004-0900ND
2014-06-178201-012-1030ND
2014-09-108201-005-0905ND
2015-07-098201-005-0809ND
2015-07-158201-009-0750ND
2015-07-218201-012-0850ND
2015-07-218201-011-0835ND
2015-07-288201-004-1035ND
2015-07-308201-005-1212ND
2015-09-168201-012-0930ND
2015-12-168201-013-0955ND
2016-02-168201-013-0910ND
2016-06-131610-005-0815ND
2016-06-298201-012-0843ND
2016-06-298201-004-0845ND
2016-07-058201-005-0911ND
2016-07-128201-009-0900ND
2016-10-258201-011-0935ND
2017-02-018201-012-0725ND
2017-02-018201-004-0830ND
2017-02-218201-013-0825ND
2017-02-228201-011-0855ND
2017-02-228201-009-0850ND
2017-06-278201-012-0910ND
2017-06-278201-004-0810ND
2017-06-288201-005-0903ND
2017-07-268201-005-0913ND