trans-1,2-Dichloroethylene
Quakertown Boro
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 | 11 | 0 | ND |
| 2015 | ND | 12 | 0 | ND |
| 2016 | ND | 10 | 0 | ND |
| 2017 | ND | 8 | 0 | ND |
| 2018 | ND | 10 | 0 | ND |
| 2019 | ND | 10 | 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 |
|---|---|---|
| 2014-02-11 | 14021155-001 | ND |
| 2014-02-12 | 14021373-001 | ND |
| 2014-02-18 | 14022024-001 | ND |
| 2014-04-10 | 14041892-001 | ND |
| 2014-07-16 | 14071804-001 | ND |
| 2014-08-14 | 14081504-001 | ND |
| 2014-08-14 | 14081511-001 | ND |
| 2014-08-14 | 14081513-001 | ND |
| 2014-08-28 | 14082989-001 | ND |
| 2014-08-28 | 14082988-001 | ND |
| 2014-12-09 | 14120590-001 | ND |
| 2015-03-23 | 12503643 | ND |
| 2015-03-23 | 12503663 | ND |
| 2015-09-28 | 13252481 | ND |
| 2015-09-28 | 13252367 | ND |
| 2015-09-28 | 13252387 | ND |
| 2015-09-28 | 13252407 | ND |
| 2015-09-28 | 13252427 | ND |
| 2015-09-28 | 13252447 | ND |
| 2015-11-11 | 13503008 | ND |
| 2015-12-17 | 13621872 | ND |
| 2015-12-29 | 13621896 | ND |
| 2015-12-30 | 13621848 | ND |
| 2016-02-11 | 13858921 | ND |
| 2016-02-19 | 13859206 | ND |
| 2016-08-17 | 14721033 | ND |
| 2016-08-25 | 14721126 | ND |
| 2016-08-25 | 14721084 | ND |
| 2016-08-25 | 14721105 | ND |
| 2016-08-31 | 14892156 | ND |
| 2016-08-31 | 14892135 | ND |
| 2016-11-10 | 15214168 | ND |
| 2016-12-15 | 15358518 | ND |
| 2017-07-20 | 16400194 | ND |
| 2017-07-20 | 16400279 | ND |
| 2017-07-20 | 16400258 | ND |
| 2017-07-20 | 16400237 | ND |
| 2017-07-20 | 16400173 | ND |
| 2017-07-20 | 16400222 | ND |
| 2017-08-17 | 16551637 | ND |
| 2017-08-17 | 16551616 | ND |
| 2018-02-01 | T8B0475 | ND |
| 2018-06-08 | T8F0689 | ND |
| 2018-06-08 | T8F0689 | ND |
| 2018-06-08 | T8F0689 | ND |
| 2018-06-13 | T8F0689 | ND |
| 2018-06-13 | T8F0689 | ND |
| 2018-06-13 | T8F0689 | ND |
| 2018-06-13 | T8F0689 | ND |
| 2018-06-13 | T8F0689 | ND |
| 2018-09-27 | T8I1279 | ND |
| 2019-04-29 | T9D0798-02 | ND |
| 2019-04-29 | T9D0799-01 | ND |
| 2019-06-20 | T9F1320-01 | ND |
| 2019-08-29 | T9H1706-01 | ND |
| 2019-11-19 | T9K0960-02 | ND |
| 2019-11-19 | T9K0960-03 | ND |
| 2019-11-19 | T9K0960-04 | ND |
| 2019-11-19 | T9K0960-05 | ND |
| 2019-11-19 | T9K0960-06 | ND |
| 2019-11-19 | T9K0960-01 | ND |