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EWG's Tap Water Database — 2019 UPDATE

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Cyanide

Charlotte Water

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.

 

104

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND100ND
2013ND140ND
2014ND200ND
2015ND200ND
2016ND200ND
2017ND200ND

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
2012-02-09AE17669-IOCND
2012-02-09AE17670-IOCND
2012-02-09AE17671-IOCND
2012-02-09AE17672-IOCND
2012-02-09AE17673-IOCND
2012-08-07AE36181-IOCND
2012-08-07AE36182-IOCND
2012-08-07AE36183-IOCND
2012-08-07AE36184-IOCND
2012-08-07AE36185-IOCND
2013-02-14AE55318-IOCND
2013-02-14AE55319-IOCND
2013-02-14AE55322-IOCND
2013-05-14AE64330-IOCND
2013-05-14AE64331-IOCND
2013-05-14AE64334-IOCND
2013-08-19AE73824-IOCND
2013-08-19AE73825-IOCND
2013-08-19AE73826-IOCND
2013-11-13AE82850-IOCND
2013-11-13AE82851-IOCND
2013-11-13AE82854-IOCND
2013-11-13AE82852-IOCND
2013-11-13AE82853ND
2014-02-19AE92460-IOCND
2014-02-19AE92461-IOCND
2014-02-19AE92462-IOCND
2014-02-19AE92463-IOCND
2014-02-19AE92464-IOCND
2014-05-13AF01539-IOCND
2014-05-13AF01535-IOCND
2014-05-13AF01536-IOCND
2014-05-13AF01538-IOCND
2014-05-13AF01537-IOCND
2014-08-07AF10203-IOCND
2014-08-07AF10204-IOCND
2014-08-07AF10207-IOCND
2014-08-07AF10205-IOCND
2014-08-07AF10206-IOCND
2014-12-03AF22248-IOCND
2014-12-03AF22249-IOCND
2014-12-03AF22245-IOCND
2014-12-03AF22250-IOCND
2014-12-03A22251-IOCND
2015-03-04ND
2015-03-04ND
2015-03-04ND
2015-03-04ND
2015-03-04ND
2015-06-11ND
2015-06-11ND
2015-06-11ND
2015-06-24ND
2015-06-24ND
2015-08-10ND
2015-08-10ND
2015-08-10ND
2015-08-10ND
2015-08-10ND
2015-11-04ND
2015-11-04ND
2015-11-04ND
2015-11-04ND
2015-11-04ND
2016-02-03AF65972_IOCND
2016-02-03AF65968_IOCND
2016-02-03AF65971_IOCND
2016-02-03AF65969_IOCND
2016-02-03AF65970_IOCND
2016-05-04AF76708_IOCND
2016-05-04AF76704_IOCND
2016-05-04AF76709_IOCND
2016-05-04AF76703_IOCND
2016-05-04AF76707_IOCND
2016-08-03AF87876_IOCND
2016-08-03AF87872_IOCND
2016-08-03AF87874_IOCND
2016-08-03AF87877_IOCND
2016-08-03AF87888_IOCND
2016-11-02AF98939_IOCND
2016-11-02AF98937_IOCND
2016-11-02AF98938_IOCND
2016-11-02AF98936_IOCND
2016-11-02AF98935_IOCND
2017-02-01AG08742_IOCND
2017-02-01AG08738_IOCND
2017-02-01AG08739_IOCND
2017-02-01AG08740_IOCND
2017-02-01AG08741_IOCND
2017-05-04AG19796_IOCND
2017-05-04AG19792_IOCND
2017-05-04AG19793_IOCND
2017-05-08AG20107_IOCND
2017-05-08AG20108_IOCND
2017-08-01AG30318_IOCND
2017-08-01AG30321_IOCND
2017-08-01AG30317_IOCND
2017-08-01AG30319_IOCND
2017-08-01AG30320_IOCND
2017-11-01AG41977_IOCND
2017-11-01AG41980_IOCND
2017-11-01AG41978_IOCND
2017-11-01AG41979_IOCND
2017-11-01AG41981_IOCND