Know Your Environment. Protect Your Health.

Cyanide

North Cherokee Water Supply Corporation

NOTE: North Cherokee Water Supply Corporation purchases water from City of Jacksonville which is required to test for cyanide. Sample information shown below was taken by City of Jacksonville.

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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020ND60ND
2021ND10ND
2022ND10ND
2023ND50ND

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

NOTE: North Cherokee Water Supply Corporation purchases water from City of Jacksonville which is required to test for cyanide. Sample information shown below was taken by City of Jacksonville.

Date Lab ID Result
2018-09-13Q1836630006ND
2019-01-30Q1904613003ND
2020-01-27Q2002874032ND
2020-01-27Q2002874033ND
2020-01-27Q2002874034ND
2020-01-27Q2002874035ND
2020-01-27Q2002874036ND
2020-05-07Q2018089008ND
2021-07-12Q2118022021ND
2022-01-10Q2200509007ND
2023-01-30Q2304172006ND
2023-09-28Q2341783028ND
2023-09-28Q2341783029ND
2023-09-28Q2341783030ND
2023-09-28Q2341783031ND