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EWG's Tap Water Database — 2021 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.

MORE ABOUT THIS CONTAMINANT

 

47

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND10ND
2015ND10ND
2016ND100ND
2017ND10ND
2018ND170ND
2019ND170ND

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
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
2018-01-16201801160489 IND
2018-01-16201801160478 IND
2018-01-16201801160477 IND
2018-01-24201801240891 IND
2018-01-24201801240738 IND
2018-01-24201801240730 IND
2018-01-29201801290249 IND
2018-01-29201801290172 IND
2018-02-26201802260220 IND
2018-02-27201802270449 IND
2018-02-27201802270532 IND
2018-03-20201803200269 IND
2018-03-20201803200261 IND
2018-03-21201803210471 IND
2018-05-17201805170725 IND
2018-05-29201805290454 IND
2018-06-13201806131020 IND
2019-01-092019010903741ND
2019-01-092019010903421ND
2019-01-092019010903471ND
2019-01-092019010903551ND
2019-01-092019010903691ND
2019-01-092019010903791ND
2019-01-09201901090384IND
2019-01-09201901090393IND
2019-01-09201901090396IND
2019-01-152019011502201ND
2019-02-062019020602301ND
2019-02-062019020602271ND
2019-02-062019020602161ND
2019-03-25201903250230IND
2019-03-252019032501821ND
2019-04-162019041604191ND
2019-04-292019042902961ND