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EWG's Tap Water Database — 2019 UPDATE

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Cyanide

City of Mesa

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.

 

67

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND300ND
2013ND20ND
2014ND10ND
2015ND300ND
2016ND20ND
2017ND20ND

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
2012-04-09201204090008IND
2012-04-16201204160112IND
2012-05-07201205070059IND
2012-05-08201205080126IND
2012-08-0612070782ND
2012-08-0612070776ND
2012-08-0612070773ND
2012-08-0712070775ND
2012-08-0812070787ND
2012-08-0812070784ND
2012-08-0812070774ND
2012-08-1312070735ND
2012-08-1312070733ND
2012-08-1312070714ND
2012-08-1412070715ND
2012-08-1412070732IND
2012-08-1412070736ND
2012-08-1512070771ND
2012-08-1512070734ND
2012-08-1512070716ND
2012-08-2212070786ND
2012-08-2212070783ND
2012-08-2212070778ND
2012-08-26201208280376IND
2012-08-27201208280375IND
2012-08-27201208280374IND
2012-08-27201208280373IND
2012-08-28201208280377IND
2012-09-2412070780ND
2012-11-2012110619ND
2013-07-1613070278ND
2013-10-1413100495ND
2014-10-0814100297ND
2015-04-0715040273ND
2015-04-0715040272ND
2015-04-0715040249ND
2015-04-1415040400ND
2015-04-2115040606ND
2015-04-2815040768ND
2015-04-2915040772ND
2015-04-2915040771ND
2015-07-0615070077ND
2015-07-0615070073ND
2015-07-0615070074ND
2015-07-0615070076ND
2015-07-0715070120IOCND
2015-07-0715070119IND
2015-07-0715070117ND
2015-07-1315070250ND
2015-07-1315070247IND
2015-07-1315070249ND
2015-07-1315070251ND
2015-07-1415070255ND
2015-07-1415070254ND
2015-07-1415070253ND
2015-07-1415070252IND
2015-07-2015070391ND
2015-07-2115070451ND
2015-07-2115070450ND
2015-07-2115070449ND
2015-07-2115070448ND
2015-07-2115070447ND
2015-07-2715070541ND
2016-06-0816060165IND
2016-10-0416100039ND
2017-01-31550-76777-1ND
2017-10-1017100401ND