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EWG's Tap Water Database — 2019 UPDATE

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Cyanide

Sandy City Water System

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.

 

26

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.217 ppb122ND - 1.40 ppb
2013ND40ND
2014ND20ND
2015ND30ND
20160.500 ppb41ND - 2.00 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 Result
2012-06-141.40 ppb
2012-06-14ND
2012-06-151.20 ppb
2012-06-15ND
2012-08-02ND
2012-08-03ND
2012-08-07ND
2012-08-09ND
2012-08-09ND
2012-08-09ND
2012-11-27ND
2012-11-27ND
2013-06-18ND
2013-06-18ND
2013-07-02ND
2013-07-02ND
2014-02-20ND
2014-07-21ND
2015-07-14ND
2015-07-16ND
2015-07-22ND
2016-06-142.00 ppb
2016-06-27ND
2016-07-14ND
2016-07-14ND
2017-09-01ND