trans-1,2-Dichloroethylene
East Hempfield 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 | ND | 7 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 13 | 0 | ND |
| 2018 | ND | 5 | 0 | ND |
| 2019 | ND | 4 | 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 |
|---|---|---|
| 2014-09-30 | 14032956-01 | ND |
| 2014-09-30 | 14032956-02 | ND |
| 2014-09-30 | 14032956-03 | ND |
| 2014-09-30 | 14032956-04 | ND |
| 2014-12-29 | 14122146-01 | ND |
| 2014-12-29 | 14122146-02 | ND |
| 2014-12-29 | 14122146-03 | ND |
| 2015-09-15 | 13360710 | ND |
| 2015-09-15 | 13360731 | ND |
| 2015-09-15 | 13360689 | ND |
| 2015-09-15 | 13360752 | ND |
| 2016-12-27 | 15481337 | ND |
| 2016-12-27 | 15481316 | ND |
| 2016-12-27 | 15481358 | ND |
| 2016-12-27 | 15481295 | ND |
| 2017-03-16 | 15901260 | ND |
| 2017-03-16 | 15901281 | ND |
| 2017-03-16 | 15901509 | ND |
| 2017-03-16 | 15901302 | ND |
| 2017-03-16 | 15901239 | ND |
| 2017-05-23 | 16218717 | ND |
| 2017-05-23 | 16218738 | ND |
| 2017-05-23 | 16218468 | ND |
| 2017-05-23 | 16218447 | ND |
| 2017-08-30 | 16844203 | ND |
| 2017-08-30 | 16844224 | ND |
| 2017-11-15 | 17129205 | ND |
| 2017-11-15 | 17129184 | ND |
| 2018-02-28 | 7104860-01 | ND |
| 2018-06-06 | 8044976-01 | ND |
| 2018-06-06 | 8044976-02 | ND |
| 2018-06-06 | 8044976-03 | ND |
| 2018-11-19 | 8015122-01 | ND |
| 2019-05-20 | 9045072-01 | ND |
| 2019-05-20 | 9045072-02 | ND |
| 2019-05-20 | 9045072-03 | ND |
| 2019-08-21 | 9085002-03 | ND |