Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

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.

MORE ABOUT THIS CONTAMINANT

 

80

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
2015ND300ND
2016ND20ND
2017ND20ND
2018ND300ND
2019ND150ND

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
2014-10-0814100297ND
2015-04-0715040273ND
2015-04-0715040272ND
2015-04-0715040249ND
2015-04-1415040400ND
2015-04-2115040606ND
2015-04-2815040768ND
2015-04-2915040771ND
2015-04-2915040772ND
2015-07-0615070077ND
2015-07-0615070076ND
2015-07-0615070074ND
2015-07-0615070073ND
2015-07-0715070120IOCND
2015-07-0715070119IND
2015-07-0715070117ND
2015-07-1315070247IND
2015-07-1315070249ND
2015-07-1315070251ND
2015-07-1315070250ND
2015-07-1415070255ND
2015-07-1415070254ND
2015-07-1415070253ND
2015-07-1415070252IND
2015-07-2015070391ND
2015-07-2115070448ND
2015-07-2115070447ND
2015-07-2115070449ND
2015-07-2115070450ND
2015-07-2115070451ND
2015-07-2715070541ND
2016-06-0816060165IND
2016-10-0416100039ND
2017-01-31550-76777-1ND
2017-10-1017100401ND
2018-04-0218030942ND
2018-04-0418030948 IOCND
2018-04-0918040100 IOCND
2018-04-0918040098ND
2018-04-1018040101ND
2018-04-1618040222 IOCND
2018-04-1618040220 IOCND
2018-04-1718040224ND
2018-04-1718040223 IOCND
2018-04-2418040504 IOCND
2018-04-2418040503 IOCND
2018-04-2418040502 IOCND
2018-04-3018040540 IOCND
2018-05-1018050425ND
2018-08-0718080202 IOCND
2018-10-1118100452ND
2018-10-1518100506ND
2018-10-1518100484ND
2018-10-1618100519ND
2018-10-1618100517ND
2018-10-1718100557ND
2018-10-1718100555 IOCND
2018-10-1818100597ND
2018-10-2218100638ND
2018-10-2218100640ND
2018-10-2318100673ND
2018-10-2418100683ND
2018-10-2418100681ND
2018-10-2918100752ND
2018-11-2618110662 IOCND
2019-03-2719030655ND
2019-03-2819030580ND
2019-04-0819040180ND
2019-04-0819040182ND
2019-04-1019040260ND
2019-04-1119040287ND
2019-04-1519040331ND
2019-04-1619040354ND
2019-04-1619040352ND
2019-04-2419040522ND
2019-08-0519080019ND
2019-08-0819080129ND
2019-08-1519080280ND
2019-08-2619080657ND
2019-09-1919090600ND