Know Your Environment. Protect Your Health.

Cyanide

Appleby 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.

 

14

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
2019N/A00N/A
2020ND60ND
2021ND10ND
2022ND10ND
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
2020-05-06Q2017875042ND
2020-05-06Q2017875043ND
2020-05-06Q2017875044ND
2020-05-06Q2017875045ND
2020-05-06Q2017875046ND
2020-05-06Q2017875047ND
2021-07-26Q2119473006ND
2022-09-06Q2226362019ND
2023-03-22Q2310842018ND
2023-03-22Q2310842019ND
2023-08-14Q2333697011ND
2023-08-14Q2333697012ND
2023-10-23Q2345174009ND
2023-10-23Q2345174010ND