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EWG's Tap Water Database — 2021 UPDATE

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Cyanide

Garden City

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.

MORE ABOUT THIS CONTAMINANT

 

69

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
2014ND90ND
2015ND120ND
2016ND120ND
2017ND100ND
2018ND110ND
2019ND150ND

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
2014-08-151408B39-005-PRIND
2014-08-151408B39-001-PRIND
2014-08-151408B39-002-PRIND
2014-08-151408B39-004-PRIND
2014-08-151408B39-003-PRIND
2014-08-181408C56-004-PRIND
2014-08-181408C56-003-PRIND
2014-08-181408C56-001-PRIND
2014-08-181408C56-002-PRIND
2015-08-051508347-001-PRIND
2015-08-051508347-004-PRIND
2015-08-051508347-002-PRIND
2015-08-051508347-005-PRIND
2015-08-051508347-003-PRIND
2015-08-061508491-002-PRIND
2015-08-061508491-007-PRIND
2015-08-061508491-004-PRIND
2015-08-061508491-001-PRIND
2015-08-071508632-001-PRIND
2015-08-071508632-002-PRIND
2015-10-281510L96-003-PRIND
2016-07-061607432-001-PRIND
2016-08-171608H35-002-PRIND
2016-08-171608H35-001-PRIND
2016-09-091609665-001-PRIND
2016-09-091609665-002-PRIND
2016-09-121609776-002-PRIND
2016-09-141609B78-003-PRIND
2016-09-141609B78-002-PRIND
2016-09-211609I88-001-PRIND
2016-09-211609I88-003-PRIND
2016-09-231609L06-001-PRIND
2016-09-231609L06-003-PRIND
2017-10-047031903005ND
2017-10-047031903003ND
2017-10-047031902006ND
2017-10-047031903004ND
2017-10-137032857003-PRIND
2017-10-137032857002-PRIND
2017-10-137032857001-PRIND
2017-10-267034156002-PRIND
2017-10-267034156001-PRIND
2017-12-227038915001-PRIND
2018-06-057053755003-PRIND
2018-09-127064528001-PRIND
2018-09-127064528002ND
2018-09-147064896001ND
2018-09-147064896003-PRIND
2018-10-117067661001-PRIND
2018-10-117067661002-PRIND
2018-10-157067953001-PRIND
2018-10-157067953002ND
2018-10-247068920001-PRIND
2018-11-217071820006ND
2019-05-097088902001-PRIND
2019-05-097088902003-PRIND
2019-08-0770100284001-PRIND
2019-08-0770100284003-PRIND
2019-08-0870100531004-PRIND
2019-08-0870100531002-PRIND
2019-08-0870100531001-PRIND
2019-08-0870100531003-PRIND
2019-08-0970100701002-PRIND
2019-08-0970100701001-PRIND
2019-08-0970100701003-PRIND
2019-08-1970101923002-PRIND
2019-08-1970101923001-PRIND
2019-08-2170102243002-PRIND
2019-08-2170102243001-PRIND