Know Your Environment. Protect Your Health.

Cyanide

Clark Public Utilities

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
2018N/A00N/A
2019N/A00N/A
2020N/A00N/A
2021ND30ND
2022ND140ND
2023ND30ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2021-06-294136308ND
2021-06-294136309ND
2021-08-024171193ND
2022-03-314266325ND
2022-07-074329454ND
2022-07-074329452ND
2022-07-074329453ND
2022-07-284328491ND
2022-07-284329448ND
2022-08-034329440ND
2022-08-034328492ND
2022-08-034329441ND
2022-08-044329468ND
2022-08-044329471ND
2022-08-044329461ND
2022-08-044328488ND
2022-08-164364181ND
2023-04-064439682ND
2023-06-014474461ND
2023-09-194531983ND