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EWG's Tap Water Database — 2019 UPDATE

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Cyanide

City of Phoenix

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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013ND10ND
2014ND70ND
2015ND10ND
2016ND10ND
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
2012-01-042010248-02ND
2013-01-023010074-01ND
2014-01-064010287-01IND
2014-01-152014001119ND
2014-01-162014001133ND
2014-01-162014001405ND
2014-01-212014003179ND
2014-01-212014003194ND
2014-02-262014009690ND
2015-01-07201501070258IND
2016-01-06201601060265IND
2017-01-04201701040662IND
2017-01-112017001854ND
2017-01-182017002421ND
2017-01-182017002434ND
2017-01-252017004349ND