Know Your Environment. Protect Your Health.

Cyanide

Columbus Public 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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
2020ND30ND
2021ND20ND
2022ND20ND
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
2018-02-0118-11908-01BND
2018-02-0118-11908-02BND
2019-02-0519-12453-01BND
2019-02-0519-12453-02BND
2020-02-1120-13191-02AND
2020-02-1120-13191-03AND
2020-06-0220-21667-03AND
2021-02-0221-12408-01AND
2021-02-0221-12408-02AND
2022-02-0822-13013-01BND
2022-02-0822-13013-02BND
2023-02-212306106-02ND
2023-02-212306106-03ND
2023-06-202321840-01AND