Know Your Environment. Protect Your Health.

trans-1,2-Dichloroethylene

Bayview Water System

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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019N/A00N/A
2020N/A00N/A
2021ND30ND
2022ND40ND
2023ND50ND

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
2018-07-16L7037550-1ND
2018-08-23L7052375-1ND
2021-08-12630-20635-1ND
2021-08-24630-21100-1ND
2021-11-19630-24489-1ND
2022-03-28630-29935-1ND
2022-05-10630-33114-1ND
2022-07-27630-40913-1ND
2022-11-08630-49307-1ND
2023-02-15630-55638-1ND
2023-05-15630-61145-1ND
2023-07-31630-68133-1ND
2023-08-09630-69049-1ND
2023-11-08630-75543-1ND