Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

trans-1,2-Dichloroethylene

Coalby Domestic Water Company

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
2014ND30ND
2015ND10ND
2016ND20ND
2017ND40ND
2018ND40ND
2019ND30ND

ppb = parts per billion

State and national drinking water standards and health guidelines

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 Result
2014-03-20ND
2014-04-14ND
2014-07-29ND
2015-08-27ND
2016-08-25ND
2016-12-13ND
2017-02-28ND
2017-04-17ND
2017-08-17ND
2017-10-16ND
2018-03-26ND
2018-06-13ND
2018-08-22ND
2018-12-17ND
2019-03-27ND
2019-06-30ND
2019-12-30ND