trans-1,2-Dichloroethylene
Memorial Villages Water Authority
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 | N/A | 0 | 0 | N/A |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 3 | 0 | ND |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 3 | 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 |
|---|---|---|
| 2015-01-23 | AC77615 | ND |
| 2015-01-23 | AC77613 | ND |
| 2015-01-23 | AC77617 | ND |
| 2016-03-14 | AD28540 | ND |
| 2016-03-14 | AD28482 | ND |
| 2016-03-14 | AD28544 | ND |
| 2017-01-04 | AD62997 | ND |
| 2017-01-04 | AD62995 | ND |
| 2017-01-04 | AD62999 | ND |
| 2018-01-22 | AE09557 | ND |
| 2018-01-22 | AE09575 | ND |
| 2018-01-22 | AE09565 | ND |
| 2019-01-10 | AE49321 | ND |
| 2019-01-10 | AE49325 | ND |
| 2019-07-12 | AE74419 | ND |