Know Your Environment. Protect Your Health.

Cyanide

Smackover Waterworks

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.

 

11

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND20ND
2020ND30ND
2021ND10ND
2022ND10ND
202316.7 ppb31ND - 50.0 ppb

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
2018-01-30Y180320010ND
2019-02-11Y190450003ND
2019-05-13Y191360033ND
2020-01-27Y200300007ND
2020-01-27Y200300006ND
2020-02-11Y200430003ND
2021-01-26Y210280032ND
2022-02-07Y220410012ND
2023-01-31Y23033000950.0 ppb
2023-01-31Y230330010ND
2023-01-31Y230330004ND