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EWG's Tap Water Database — 2019 UPDATE

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Cyanide

City of Lake Charles Water System

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.

 

72

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND340ND
2013N/A00N/A
2014N/A00N/A
2015ND320ND
2016N/A00N/A
2017ND60ND

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
2012-04-30AD65260ND
2012-04-30AD65260ND
2012-04-30AD65265ND
2012-04-30AD65270ND
2012-04-30AD65275ND
2012-04-30AD65280ND
2012-04-30AD65280ND
2012-04-30AD65275ND
2012-04-30AD65265ND
2012-04-30AD65270ND
2012-05-29AD65720ND
2012-05-29AD65725ND
2012-05-29AD65735ND
2012-05-29AD65730ND
2012-05-29AD65740ND
2012-05-29AD65735ND
2012-05-29AD65725ND
2012-05-29AD65740ND
2012-05-29AD65720ND
2012-05-29AD65730ND
2012-07-23AD67939ND
2012-07-23AD67934ND
2012-07-23AD67944ND
2012-07-23AD67954ND
2012-07-23AD67949ND
2012-07-23AD67944ND
2012-07-23AD67954ND
2012-07-23AD67949ND
2012-07-23AD67939ND
2012-07-23AD67934ND
2012-10-08AD71679ND
2012-10-08AD71669ND
2012-10-08AD71679ND
2012-10-08AD71669ND
2015-03-2335180731004ND
2015-03-2335180731003ND
2015-03-2335180731002ND
2015-03-2335180731005ND
2015-03-2335180731005ND
2015-03-2335180731001ND
2015-03-2335180731001ND
2015-03-2335180731002ND
2015-03-2335180731003ND
2015-03-2335180731004ND
2015-07-2735199384005ND
2015-07-2735199384001ND
2015-07-2735199384004ND
2015-07-2735199384003ND
2015-07-2735199384002ND
2015-07-2735199384002ND
2015-07-2735199384003ND
2015-07-2735199384004ND
2015-07-2735199384005ND
2015-07-2735199384001ND
2015-08-1035201689001ND
2015-08-1035201689004ND
2015-08-1035201689005ND
2015-08-1035201689002ND
2015-08-1035201689005ND
2015-08-1035201689004ND
2015-08-1035201689003ND
2015-08-1035201689001ND
2015-08-1035201689002ND
2015-08-1035201689003ND
2015-09-2135208328005ND
2015-09-2135208328005ND
2017-12-18AE20288ND
2017-12-18AE20280ND
2017-12-18AE20280ND
2017-12-18AE20284ND
2017-12-18AE20288ND
2017-12-18AE20284ND