Know Your Environment. Protect Your Health.

Cyanide

Hillview Water Company-oakhurst/sierra Lakes

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.

 

39

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
2020ND120ND
2021ND120ND
2022N/A00N/A
2023ND150ND

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
2020-08-20CA2010007_003_003-202008201354ND
2020-08-20CA2010007_031_031-202008201141ND
2020-08-20CA2010007_030_030-202008201127ND
2020-08-20CA2010007_028_028-202008201132ND
2020-08-20CA2010007_041_041-202008201215ND
2020-08-20CA2010007_039_039-202008201230ND
2020-08-20CA2010007_032_032-202008201148ND
2020-08-20CA2010007_034_034-202008201112ND
2020-08-20CA2010007_033_033-202008201155ND
2020-08-20CA2010007_017_017-202008200820ND
2020-08-20CA2010007_002_002-202008201343ND
2020-08-20CA2010007_007_007-202008201102ND
2021-02-17CA2010007_040_040-202102171105ND
2021-08-11CA2010007_048_048-202108110908ND
2021-08-16CA2010007_046_046-202108160908ND
2021-08-16CA2010007_009_009-202108160908ND
2021-08-16CA2010007_010_010-202108160908ND
2021-08-16CA2010007_024_024-202108160908ND
2021-08-16CA2010007_047_047-202108160908ND
2021-08-16CA2010007_001_001-202108160808ND
2021-09-28CA2010007_051_051-202109280757ND
2021-09-28CA2010007_048_048-202109280902ND
2021-09-28CA2010007_047_047-202109280858ND
2021-09-28CA2010007_014_014-202109280800ND
2023-06-05CA2010007_039_039-202306051117ND
2023-06-05CA2010007_034_034-202306051015ND
2023-06-05CA2010007_032_032-202306050951ND
2023-06-05CA2010007_007_007-202306050915ND
2023-06-05CA2010007_041_041-202306051012ND
2023-06-05CA2010007_040_040-202306051031ND
2023-06-05CA2010007_033_033-202306050958ND
2023-06-05CA2010007_030_030-202306050935ND
2023-06-05CA2010007_031_031-202306050945ND
2023-06-06CA2010007_051_051-202306060820ND
2023-06-06CA2010007_002_002-202306060822ND
2023-06-06CA2010007_003_003-202306060851ND
2023-06-06CA2010007_013_013-202306061000ND
2023-06-06CA2010007_028_028-202306061014ND
2023-06-06CA2010007_017_017-202306060958ND