Know Your Environment. Protect Your Health.

trans-1,2-Dichloroethylene

Crowley Water System (LAWCO)

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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND80ND
2019N/A00N/A
2020ND50ND
2021N/A00N/A
2022N/A00N/A
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
2018-07-3035407885002ND
2018-07-3035407885003ND
2018-07-3035407885004ND
2018-07-3035407885001ND
2018-07-3035407885002ND
2018-07-3035407885003ND
2018-07-3035407885004ND
2018-07-3035407885001ND
2020-12-1435599407002ND
2020-12-1435599407005ND
2020-12-1435599407004ND
2020-12-1435599407003ND
2020-12-1435599407001ND
2023-10-0335832383001ND
2023-10-0335832383002ND
2023-10-0335832383003ND
2023-10-0335832383004ND
2023-10-0335832383005ND