trans-1,2-Dichloroethylene
Aqua Pa Uwchlan
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 | 6 | 0 | ND |
| 2015 | ND | 6 | 0 | ND |
| 2016 | ND | 6 | 0 | ND |
| 2017 | ND | 6 | 0 | ND |
| 2018 | ND | 6 | 0 | ND |
| 2019 | ND | 7 | 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 |
|---|---|---|
| 2014-02-06 | AE22430 | ND |
| 2014-02-14 | AE22387 | ND |
| 2014-02-14 | AE22385 | ND |
| 2014-02-21 | AE23943 | ND |
| 2014-02-21 | AE23946 | ND |
| 2014-04-23 | AE29861 | ND |
| 2015-02-03 | 12395457 | ND |
| 2015-02-03 | 12395499 | ND |
| 2015-02-03 | 12395520 | ND |
| 2015-02-03 | 12395541 | ND |
| 2015-02-04 | 12395436 | ND |
| 2015-02-04 | 12395478 | ND |
| 2016-01-22 | 13746281 | ND |
| 2016-01-22 | 13746260 | ND |
| 2016-01-22 | 13746218 | ND |
| 2016-01-22 | 13746239 | ND |
| 2016-02-10 | 13864185 | ND |
| 2016-02-10 | 13864206 | ND |
| 2017-03-28 | 15787979 | ND |
| 2017-03-28 | 15787958 | ND |
| 2017-04-19 | 15928765 | ND |
| 2017-04-19 | 15928786 | ND |
| 2017-04-21 | 15928744 | ND |
| 2017-06-21 | 16249809 | ND |
| 2018-01-29 | AF74449 | ND |
| 2018-01-31 | AF73819 | ND |
| 2018-02-26 | AF76934 | ND |
| 2018-02-26 | AF76935 | ND |
| 2018-03-13 | AF77984 | ND |
| 2018-03-13 | AF77985 | ND |
| 2019-03-06 | AG10267 | ND |
| 2019-03-06 | AG10268 | ND |
| 2019-03-06 | AG10266 | ND |
| 2019-03-12 | AG10439 | ND |
| 2019-03-12 | AG10441 | ND |
| 2019-03-27 | AG11746 | ND |
| 2019-11-07 | AG37520 | ND |