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EWG's Tap Water Database — 2019 UPDATE

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Cyanide

Salt Lake 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.

 

111

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.563 ppb164ND - 3.00 ppb
20130.125 ppb161ND - 2.00 ppb
20140.286 ppb142ND - 2.00 ppb
20150.125 ppb161ND - 2.00 ppb
20160.760 ppb258ND - 3.00 ppb
20170.723 ppb242ND - 11.9 ppb

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
2012-01-25ND
2012-01-25ND
2012-01-26ND
2012-05-25ND
2012-06-012.00 ppb
2012-06-01ND
2012-06-01ND
2012-06-05ND
2012-06-05ND
2012-06-29ND
2012-06-29ND
2012-06-292.00 ppb
2012-06-293.00 ppb
2012-07-13ND
2012-07-172.00 ppb
2012-07-17ND
2013-01-18ND
2013-01-25ND
2013-01-25ND
2013-05-10ND
2013-05-15ND
2013-05-15ND
2013-05-16ND
2013-06-18ND
2013-06-18ND
2013-06-182.00 ppb
2013-06-25ND
2013-06-28ND
2013-06-28ND
2013-07-30ND
2013-07-30ND
2013-08-27ND
2014-01-10ND
2014-05-23ND
2014-05-30ND
2014-05-30ND
2014-06-03ND
2014-06-11ND
2014-06-25ND
2014-06-25ND
2014-07-012.00 ppb
2014-07-01ND
2014-07-022.00 ppb
2014-07-09ND
2014-07-09ND
2014-07-09ND
2015-01-23ND
2015-01-23ND
2015-01-30ND
2015-01-30ND
2015-02-272.00 ppb
2015-05-01ND
2015-05-08ND
2015-05-15ND
2015-06-19ND
2015-06-19ND
2015-06-19ND
2015-06-19ND
2015-07-10ND
2015-07-10ND
2015-07-10ND
2015-07-17ND
2016-01-08ND
2016-01-082.00 ppb
2016-01-15ND
2016-02-123.00 ppb
2016-02-26ND
2016-03-252.00 ppb
2016-05-19ND
2016-05-19ND
2016-06-03ND
2016-06-03ND
2016-06-10ND
2016-06-10ND
2016-06-10ND
2016-06-24ND
2016-06-24ND
2016-06-24ND
2016-06-283.00 ppb
2016-06-28ND
2016-07-082.00 ppb
2016-07-082.00 ppb
2016-07-13ND
2016-07-293.00 ppb
2016-07-29ND
2016-07-292.00 ppb
2016-09-08ND
2017-01-13ND
2017-01-13ND
2017-01-20ND
2017-01-20ND
2017-03-03ND
2017-03-24ND
2017-06-09ND
2017-06-09ND
2017-06-1611.9 ppb
2017-06-16ND
2017-06-16ND
2017-06-20ND
2017-06-23ND
2017-06-30ND
2017-06-30ND
2017-07-14ND
2017-07-14ND
2017-07-21ND
2017-07-21ND
2017-08-03ND
2017-08-08ND
2017-08-08ND
2017-08-225.44 ppb
2017-08-23ND