trans-1,2-Dichloroethylene
Western Greene
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | ND | 1 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
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 | Lab ID | Result |
|---|---|---|
| 2014-08-06 | 14219000501 | ND |
| 2015-01-14 | 15015009201 | ND |
| 2015-09-08 | 15252004101 | ND |
| 2016-07-27 | 16210000801 | ND |
| 2016-11-21 | 16328000704 | ND |
| 2017-01-11 | 17012006809 | ND |
| 2017-05-09 | 17130006308 | ND |
| 2017-07-18 | 17200000808 | ND |
| 2017-07-18 | 17200000701 | ND |
| 2018-01-09 | 18012000701 | ND |
| 2018-04-10 | 18101010101 | ND |
| 2018-08-28 | 18242002701 | ND |
| 2019-08-07 | 19220013501 | ND |