Know Your Environment. Protect Your Health.

Cyanide

Hickory Grove Water System

NOTE: Hickory Grove Water System purchases water from Fairview Union Water System which is required to test for cyanide. Sample information shown below was taken by Fairview Union 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.

 

8

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND80ND
2020ND10ND
2021ND40ND
2022ND10ND
2023ND10ND

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: Hickory Grove Water System purchases water from Fairview Union Water System which is required to test for cyanide. Sample information shown below was taken by Fairview Union Water System.

Date Lab ID Result
2018-01-2235370033001ND
2018-01-2235370033001ND
2019-02-2535450972001ND
2019-02-2535450972001ND
2020-02-17B2000778-001ND
2021-01-14B2100146-001ND
2022-02-01B2200514-001ND
2023-03-06B2300969-001ND