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EWG's Tap Water Database — 2019 UPDATE

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Cyanide

Town of Gilbert

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.

 

53

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND280ND
2013ND120ND
2014ND10ND
2015ND10ND
2016ND100ND
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
2012-01-09PVA0476-01ND
2012-01-09PVA0475-01IND
2012-01-12PVA0815-01ND
2012-01-12PVA0814-01ND
2012-01-17PVA1028-01ND
2012-01-18PVA1137-01ND
2012-01-19PVA1240-01ND
2012-01-25PVA1556-01ND
2012-02-13PVB0899-01ND
2012-02-13PVB0898-01ND
2012-02-13PVB0897-01ND
2012-02-28PVB1867-01BND
2012-03-01PVC0073-01BND
2012-03-15PVC1257-01IND
2012-03-27PVC1957-01ND
2012-04-02PVD0073-01ND
2012-04-02PVD0064-01ND
2012-04-09PVD0611-01IND
2012-04-23PVD1652-01ND
2012-05-02PVE0219-01IND
2012-07-02PVG0068-01BND
2012-07-02PVG0062-01BND
2012-07-26PVG1876-01ND
2012-08-01PVH0103-01ND
2012-08-28PVH2122-01ND
2012-10-01PVJ0070-01IND
2012-10-01PVJ0072-01IND
2012-12-20PVL1426-01IND
2013-07-29550-7636-1ND
2013-07-29550-7634-1IND
2013-07-30550-7716-1IND
2013-07-30550-7713-1ND
2013-07-31550-7815-1IND
2013-07-31550-7810-1IND
2013-08-07550-8302-1ND
2013-08-12550-8579-1ND
2013-08-13550-8672-1ND
2013-08-26550-9435-1IND
2013-10-15201310150527IND
2013-10-22201310220364IND
2014-01-27201401270086IND
2015-01-28201501280356IND
2016-01-12201601120223IND
2016-01-19201601190321IND
2016-01-26201601260298IND
2016-02-08201602080053IND
2016-02-08201602080042IND
2016-03-02201603020441IND
2016-03-23201603230453IND
2016-04-07201604070686IND
2016-04-19201604190185IND
2016-05-31201605310460IND
2017-01-042017010408151ND