trans-1,2-Dichloroethylene
Perkasie Regional 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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 11 | 0 | ND |
| 2015 | ND | 11 | 0 | ND |
| 2016 | ND | 11 | 0 | ND |
| 2017 | ND | 10 | 0 | ND |
| 2018 | ND | 7 | 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 |
|---|---|---|
| 2014-03-11 | L2515685-1 | ND |
| 2014-03-11 | L2515685-2 | ND |
| 2014-06-10 | L5101092-11 | ND |
| 2014-06-10 | L5101092-12 | ND |
| 2014-09-09 | L5170431-1 | ND |
| 2014-09-09 | L5170431-3 | ND |
| 2014-09-09 | L5170431-5 | ND |
| 2014-09-09 | L5170431-2 | ND |
| 2014-09-09 | L5170431-4 | ND |
| 2014-12-09 | L5292845-1 | ND |
| 2014-12-09 | L5292845-2 | ND |
| 2015-03-10 | 12501690 | ND |
| 2015-03-10 | 12501744 | ND |
| 2015-06-09 | 12867679 | ND |
| 2015-06-09 | 12867733 | ND |
| 2015-09-08 | 13250111 | ND |
| 2015-09-08 | 13250219 | ND |
| 2015-09-08 | 13250165 | ND |
| 2015-09-08 | 13250273 | ND |
| 2015-09-08 | 13250327 | ND |
| 2015-12-08 | 13619648 | ND |
| 2015-12-08 | 13619702 | ND |
| 2016-03-08 | 13972798 | ND |
| 2016-03-08 | 13972746 | ND |
| 2016-06-07 | 14389115 | ND |
| 2016-06-07 | 14389063 | ND |
| 2016-09-13 | 14889461 | ND |
| 2016-09-13 | 14889617 | ND |
| 2016-09-13 | 14889565 | ND |
| 2016-09-13 | 14889669 | ND |
| 2016-09-13 | 14889513 | ND |
| 2016-12-06 | 15356023 | ND |
| 2016-12-06 | 15356075 | ND |
| 2017-03-07 | 15780129 | ND |
| 2017-03-07 | 15780181 | ND |
| 2017-06-06 | 16240754 | ND |
| 2017-06-06 | 16240806 | ND |
| 2017-09-05 | 16711071 | ND |
| 2017-09-05 | 16710967 | ND |
| 2017-09-05 | 16711019 | ND |
| 2017-09-05 | 16710915 | ND |
| 2017-12-05 | 17146810 | ND |
| 2017-12-05 | 17146862 | ND |
| 2018-03-06 | 8024485-02 | ND |
| 2018-06-04 | 8052857-02 | ND |
| 2018-09-04 | 8084662-02 | ND |
| 2018-09-17 | 8093548-03 | ND |
| 2018-09-17 | 8093548-02 | ND |
| 2018-09-17 | 8093548-01 | ND |
| 2018-12-03 | 8110453-02RE | ND |
| 2019-03-05 | 9023322-02 | ND |
| 2019-06-04 | 9053891-02 | ND |
| 2019-09-03 | 9084135-02 | ND |
| 2019-11-11 | 9111441-02 | ND |
| 2019-11-11 | 9111441-03 | ND |
| 2019-11-11 | 9111441-01 | ND |
| 2019-12-03 | 9113323-02 | ND |