Know Your Environment. Protect Your Health.

Cyanide

City of Brady Water System

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.

 

29

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND50ND
2019ND60ND
2020ND50ND
2021ND50ND
2022ND50ND
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
2018-02-20AE14615ND
2018-02-20AE14616ND
2018-02-20AE14617ND
2018-02-20AE14614ND
2018-08-01AE35461ND
2019-04-15AE62452ND
2019-04-15AE62453ND
2019-04-15AE62454ND
2019-07-15AE74550ND
2019-07-15AE74551ND
2019-07-15AE74552ND
2020-02-26AF00221ND
2020-02-26AF00222ND
2020-02-26AF00220ND
2020-02-26AF00219ND
2020-02-26AF00218ND
2021-01-13AF39348ND
2021-01-13AF39349ND
2021-01-13AF39350ND
2021-01-13AF39351ND
2021-01-13AF39353ND
2022-06-14AG00781ND
2022-06-14AG00782ND
2022-06-14AG00784ND
2022-08-04AG07764ND
2022-08-04AG07765ND
2023-01-19AG25170ND
2023-01-19AG25183ND
2023-01-19AG25184ND