trans-1,2-Dichloroethylene
Schwenksville Borough 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 | 6 | 0 | ND |
| 2015 | ND | 5 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | ND | 8 | 0 | ND |
| 2019 | ND | 5 | 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 |
|---|---|---|
| 2014-03-13 | 140010537 | ND |
| 2014-03-13 | 140010536 | ND |
| 2014-03-13 | 140010540 | ND |
| 2014-03-13 | 140010539 | ND |
| 2014-03-13 | 140010538 | ND |
| 2014-10-07 | 140045435 | ND |
| 2015-02-05 | 12402658 | ND |
| 2015-02-05 | 12402680 | ND |
| 2015-02-05 | 12402703 | ND |
| 2015-02-05 | 12402728 | ND |
| 2015-06-04 | 12883415 | ND |
| 2016-03-03 | 13987044 | ND |
| 2016-03-03 | 13987019 | ND |
| 2016-03-03 | 13986995 | ND |
| 2016-06-02 | 14406546 | ND |
| 2017-01-26 | 15656672 | ND |
| 2017-01-26 | 15656671 | ND |
| 2017-06-01 | 16095933 | ND |
| 2017-12-18 | 17163156 | ND |
| 2017-12-18 | 17163134 | ND |
| 2018-01-31 | 8002367-04 | ND |
| 2018-01-31 | 8002367-01 | ND |
| 2018-01-31 | 8002367-02 | ND |
| 2018-01-31 | 8002367-03 | ND |
| 2018-04-16 | 8010173-01 | ND |
| 2018-05-04 | 8012268-01 | ND |
| 2018-07-16 | 8019952-01 | ND |
| 2018-10-15 | 8029253-01 | ND |
| 2019-02-01 | 9003521-04 | ND |
| 2019-02-01 | 9003521-01 | ND |
| 2019-02-01 | 9003521-02 | ND |
| 2019-02-01 | 9003521-03 | ND |
| 2019-05-01 | 9013602-01 | ND |