trans-1,2-Dichloroethylene
Penn State Univ.
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 | 14 | 0 | ND |
| 2015 | ND | 7 | 0 | ND |
| 2016 | ND | 24 | 0 | ND |
| 2017 | ND | 13 | 0 | ND |
| 2018 | ND | 9 | 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 |
|---|---|---|
| 2014-01-23 | 4A23025-06 | ND |
| 2014-01-23 | 4A23025-07 | ND |
| 2014-01-23 | 4A23033-06 | ND |
| 2014-02-20 | 4B20042-07 | ND |
| 2014-02-20 | 4B20042-06 | ND |
| 2014-02-20 | 4B20041-07 | ND |
| 2014-03-11 | 4C11016-07 | ND |
| 2014-03-11 | 4C11027-07 | ND |
| 2014-03-11 | 4C11016-06 | ND |
| 2014-04-09 | 4D09031-01 | ND |
| 2014-04-09 | 4D09037-01 | ND |
| 2014-04-09 | 4D09036-01 | ND |
| 2014-06-11 | 4F11107-04 | ND |
| 2014-06-11 | 4F11107-05 | ND |
| 2015-01-21 | 13561268 | ND |
| 2015-11-11 | 13561205 | ND |
| 2015-11-11 | 13561157 | ND |
| 2015-11-11 | 13561181 | ND |
| 2015-12-10 | 13681473 | ND |
| 2015-12-10 | 13681510 | ND |
| 2015-12-10 | 13681472 | ND |
| 2016-02-23 | 13917098 | ND |
| 2016-02-23 | 13917063 | ND |
| 2016-02-23 | 13917097 | ND |
| 2016-03-16 | 14032199 | ND |
| 2016-03-16 | 14032222 | ND |
| 2016-03-16 | 14032176 | ND |
| 2016-04-20 | 14163583 | ND |
| 2016-04-20 | 14163584 | ND |
| 2016-04-20 | 14163549 | ND |
| 2016-05-18 | 14312891 | ND |
| 2016-05-18 | 14312892 | ND |
| 2016-05-18 | 14312929 | ND |
| 2016-06-21 | 14471216 | ND |
| 2016-06-21 | 14471217 | ND |
| 2016-06-21 | 14471255 | ND |
| 2016-07-19 | 14636459 | ND |
| 2016-07-19 | 14636458 | ND |
| 2016-07-19 | 14636422 | ND |
| 2016-08-23 | 14804504 | ND |
| 2016-08-23 | 14804479 | ND |
| 2016-08-23 | 14804529 | ND |
| 2016-09-28 | 14975875 | ND |
| 2016-09-28 | 14975874 | ND |
| 2016-09-28 | 14975913 | ND |
| 2017-01-17 | 15573231 | ND |
| 2017-01-17 | 15573230 | ND |
| 2017-01-18 | 15573194 | ND |
| 2017-02-23 | 15709644 | ND |
| 2017-02-23 | 15709643 | ND |
| 2017-03-23 | 15850699 | ND |
| 2017-03-28 | 15850827 | ND |
| 2017-04-18 | 16001574 | ND |
| 2017-04-18 | 16001573 | ND |
| 2017-07-12 | 16473286 | ND |
| 2017-08-03 | 16629361 | ND |
| 2017-10-31 | 16937424 | ND |
| 2017-11-30 | 17077363 | ND |
| 2018-01-31 | 8A31018-01 | ND |
| 2018-02-20 | 8B21092-08 | ND |
| 2018-02-22 | 8B23070-07 | ND |
| 2018-04-11 | 8D12138-07 | ND |
| 2018-04-26 | 8D27100-10 | ND |
| 2018-06-01 | 8F01151-05 | ND |
| 2018-07-11 | 8G12180-04 | ND |
| 2018-08-01 | 8H02080-01 | ND |
| 2018-10-04 | 8J05241-01 | ND |
| 2019-02-21 | 9B22087-01 | ND |
| 2019-05-09 | 9E13165-01 | ND |
| 2019-08-14 | 9H15241-01 | ND |
| 2019-10-24 | 9J28033-01 | ND |