Know Your Environment. Protect Your Health.

Cyanide

Heritage Ranch Community Services District

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.

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND40ND
2020ND30ND
2021ND30ND
2022ND40ND
2023ND40ND

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
2018-05-10CA4010012_001_001-201805101300ND
2018-05-10CA4010012_002_002-201805101306ND
2018-11-01CA4010012_002_002-201811011318ND
2018-11-01CA4010012_001_001-201811011307ND
2019-05-09CA4010012_002_002-201905091240ND
2019-05-09CA4010012_001_001-201905091217ND
2019-11-04CA4010012_001_001-201911041310ND
2019-11-04CA4010012_002_002-201911041315ND
2020-05-07CA4010012_002_002-202005071053ND
2020-05-07CA4010012_001_001-202005071035ND
2020-11-19CA4010012_001_001-202011191330ND
2021-06-10CA4010012_001_001-202106101322ND
2021-11-18CA4010012_002_002-202111181030ND
2021-11-18CA4010012_001_001-202111181020ND
2022-05-12CA4010012_001_001-202205120944ND
2022-05-12CA4010012_002_002-202205120953ND
2022-11-03CA4010012_001_001-202211031053ND
2022-11-03CA4010012_002_002-202211031059ND
2023-05-18CA4010012_001_001-202305180931ND
2023-05-18CA4010012_002_002-202305180948ND
2023-11-09CA4010012_001_001-202311091019ND
2023-11-09CA4010012_002_002-202311091028ND