Know Your Environment. Protect Your Health.

trans-1,2-Dichloroethylene

City of The Dalles

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
2018ND30ND
2019ND10ND
2020ND10ND
2021ND40ND
2022ND40ND
2023ND40ND

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
2018-08-16V8H038102-VND
2018-08-16V8H038101-VND
2018-08-16V8H038103-VND
2019-08-14B9H225803-VND
2020-08-11VDH027501-VND
2021-08-18202108190352-VND
2021-08-18202108190360-VND
2021-08-18202108190359-VND
2021-08-18202108190351-VND
2022-09-07810-36663-3-VND
2022-09-07810-36663-1-VND
2022-09-07810-36663-4-VND
2022-09-07810-36663-2-VND
2023-08-02VGH0111-04-VND
2023-08-02VGH0111-03-VND
2023-08-02VGH0111-02-VND
2023-08-02VGH0111-01-VND