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EWG's Tap Water Database — 2019 UPDATE

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Cyanide

City of Edmond - Arcadia Lake

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.

 

27

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013ND130ND
2014ND10ND
2015ND10ND
20160.773 ppb116ND - 2.08 ppb
2017ND10ND

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
2013-10-043J04022-03ND
2013-10-043J04022-02ND
2013-10-313J31028-08ND
2013-10-313J31028-07ND
2013-10-313J31028-06ND
2013-10-313J31028-02ND
2013-10-313J31028-01ND
2013-11-013K01014-10ND
2013-11-013K01014-08ND
2013-11-013K01014-06ND
2013-11-153K15015-03ND
2013-11-153K15015-02ND
2013-11-153K15015-01ND
2014-12-174L17093-01ND
2015-11-095K09022-01ND
2016-04-2814867562.08 ppb
2016-04-281486755ND
2016-04-281486754ND
2016-04-281486753ND
2016-05-0314891951.18 ppb
2016-05-051489198ND
2016-05-0514891971.37 ppb
2016-05-0514891961.48 ppb
2016-05-1114911501.27 ppb
2016-05-1214911541.12 ppb
2016-07-281511292ND
2017-03-217C21038-04ND