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EWG's Tap Water Database — 2019 UPDATE

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Cyanide

Rockford

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.

 

57

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND50ND
2013ND20ND
2014ND220ND
2015ND30ND
2016ND20ND
2017ND230ND

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
2012-01-242012864-04ND
2012-03-222032563-02ND
2012-03-222032563-01ND
2012-03-222032567-01ND
2012-04-252043207-04ND
2013-06-253063688-01ND
2013-11-133111834-01ND
2014-01-214012700-06ND
2014-01-214012700-04ND
2014-01-214012700-05ND
2014-01-214012700-03ND
2014-01-224012700-01ND
2014-01-224012700-02ND
2014-01-274013503-02ND
2014-01-284013503-01ND
2014-01-314020631-04ND
2014-01-314020631-05ND
2014-01-314020631-01ND
2014-01-314020631-03ND
2014-01-314020631-02ND
2014-02-184022291-01ND
2014-02-184022289-01ND
2014-02-254023202-01ND
2014-07-234073622-05ND
2014-07-234073622-04ND
2014-07-234073622-01ND
2014-10-284104357-01ND
2014-12-054121752-01ND
2014-12-124122805-01ND
2015-01-285013651-04ND
2015-04-155042507-02ND
2015-06-175062896-01ND
2016-10-126102040-01ND
2016-12-146122205-01ND
2017-01-067011622-02ND
2017-01-067011622-01ND
2017-01-137012603-01ND
2017-01-137012600-02ND
2017-01-137012603-02ND
2017-01-137012603-03ND
2017-01-137012600-01ND
2017-01-137012600-04ND
2017-01-207013468-04ND
2017-01-207013468-02ND
2017-01-207013468-01ND
2017-02-037021369-01ND
2017-02-037021369-02ND
2017-02-107022427-01ND
2017-03-087031384-01ND
2017-05-267055219-01ND
2017-07-247075084-05ND
2017-07-247075084-07ND
2017-07-247075084-06ND
2017-07-247075084-02ND
2017-07-247075084-03ND
2017-10-137103385-03ND
2017-12-067121184-03ND