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EWG's Tap Water Database — 2019 UPDATE

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Cyanide

City of Gulfport

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.

 

31

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013N/A00N/A
2014ND240ND
2015N/A00N/A
2016N/A00N/A
2017ND50ND

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
2012-03-19120320-007CNND
2012-03-19120320-006CNND
2014-02-24140225-050CNND
2014-02-24140225-028CNND
2014-02-24140225-027CNND
2014-02-24140225-026CNND
2014-02-24140225-024CNND
2014-03-03140304-035CNND
2014-08-06140807-028CNND
2014-08-06140807-027CNND
2014-08-06140807-026CNND
2014-08-06140807-025CNND
2014-08-06140807-024CNND
2014-08-06140807-023CNND
2014-08-06140807-022CNND
2014-08-06140807-021CNND
2014-08-06140807-020CNND
2014-08-06140807-012CNND
2014-08-06140807-013CNND
2014-08-06140807-014CNND
2014-08-06140807-015CNND
2014-08-06140807-016CNND
2014-08-06140807-017CNND
2014-08-06140807-018CNND
2014-08-06140807-019CNND
2014-08-11140812-025CNND
2017-05-10170511-004CNND
2017-09-12170913-015CNND
2017-09-12170913-013CNND
2017-09-12170913-012CNND
2017-09-12170913-010CNND