Know Your Environment. Protect Your Health.

Cyanide

Sharon Water Supply Corporation

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.

 

18

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
2019ND20ND
2020ND80ND
2021N/A00N/A
2022ND20ND
2023ND60ND

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
2019-06-06Q1932969029ND
2019-06-06Q1932969028ND
2020-01-21Q2002254024ND
2020-04-08Q2014338010ND
2020-10-21Q2041036056ND
2020-10-21Q2041036055ND
2020-10-21Q2041036054ND
2020-10-21Q2041036053ND
2020-10-21Q2041036052ND
2020-10-21Q2041036051ND
2022-03-09Q2208229004ND
2022-10-20Q2231930025ND
2023-01-11Q2301806008ND
2023-08-15Q2334031024ND
2023-10-25Q2346021006ND
2023-10-25Q2346021007ND
2023-10-25Q2346021037ND
2023-10-25Q2346021038ND