Know Your Environment. Protect Your Health.

trans-1,2-Dichloroethylene

Bear Valley Joint Authority

1,2-Dichloroethylene, a neurotoxic solvent, exists in two different forms: trans-1,2-dichloroethylene and cis-1,2-dichloroethylene. A mixture of the two forms is used to manufacture other solvents and chemical products.

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND30ND
2020ND40ND
2021ND20ND
2022ND20ND
2023ND20ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 60 ppb

The EWG Health Guideline of 60 ppb for trans-1,2-dichloroethylene 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 internal organs.

EPA Maximum Contaminant
Level (MCL): 100 ppb

The legal limit for trans-1,2-dichloroethylene, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1980s.

ppb = parts per billion

All test results

Date Lab ID Result
2018-05-29(102)ND
2018-07-17(102)ND
2018-10-16(101) TREATMND
2018-11-27(102)ND
2019-02-19(102)ND
2019-11-069K07106-01ND
2019-12-179L18235-01ND
2020-01-2921624703.00ND
2020-04-1522165876.00ND
2020-07-2922750952.00ND
2020-09-2323137065.00ND
2021-09-2825358601.00ND
2021-09-2825358634.00ND
2022-09-1427594689.00ND
2022-10-1327779640.00ND
2023-09-0629840905.00ND
2023-09-0629840939.00ND