Know Your Environment. Protect Your Health.

trans-1,2-Dichloroethylene

City of Gonzales

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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
2020ND50ND
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
2018-05-03AE25102ND
2018-08-16AE37381ND
2019-03-05AE57172ND
2019-07-12AE74427ND
2020-01-21AE94327ND
2020-01-21AE94345ND
2020-04-13AF06481ND
2020-07-07AF18363ND
2020-11-13AF34895ND
2021-01-13AF39138ND
2021-01-13AF39140ND
2022-03-11AF88903ND
2022-09-30AG15716ND
2023-02-27AG30619ND
2023-02-27AG30625ND