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EWG's Tap Water Database — 2021 UPDATE

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Cyanide

Lihue-Kapaa

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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND10ND
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018ND180ND
2019ND10ND

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
2014-10-29201410290310ND
2018-05-29201805310727ND
2018-05-29201805310728ND
2018-06-06201806090374ND
2018-06-06201806090380ND
2018-06-06201806090381ND
2018-06-06201806090373ND
2018-06-12201806140887ND
2018-06-12201806141145ND
2018-06-12201806141144ND
2018-06-12201806140889ND
2018-06-13201806150518ND
2018-06-13201806150730ND
2018-06-13201806150729ND
2018-06-13201806150527ND
2018-06-13201806150685ND
2018-06-13201806150684ND
2018-07-12201807130880ND
2018-07-12201807000000ND
2019-10-01201910020294ND