trans-1,2-Dichloroethylene
Philadelphia Water Department
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 | 15 | 0 | ND |
| 2015 | ND | 12 | 0 | ND |
| 2016 | ND | 12 | 0 | ND |
| 2017 | ND | 15 | 0 | ND |
| 2018 | ND | 15 | 0 | ND |
| 2019 | ND | 12 | 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 |
|---|---|---|
| 2014-02-12 | DW140212-000 | ND |
| 2014-02-12 | DW140212-001 | ND |
| 2014-02-12 | DW140212-003 | ND |
| 2014-05-14 | 7463348 | ND |
| 2014-05-14 | 7468948 | ND |
| 2014-05-14 | 7463350 | ND |
| 2014-05-14 | 7468950 | ND |
| 2014-05-14 | 7468949 | ND |
| 2014-05-14 | 7463349 | ND |
| 2014-08-13 | 7570046 | ND |
| 2014-08-13 | 7570047 | ND |
| 2014-08-13 | 7570048 | ND |
| 2014-11-19 | DW141119-002 | ND |
| 2014-11-19 | DW141119-038 | ND |
| 2014-11-19 | DW141119-019 | ND |
| 2015-02-11 | 12406535 | ND |
| 2015-02-11 | 12406495 | ND |
| 2015-02-11 | 12406515 | ND |
| 2015-05-13 | 12754287 | ND |
| 2015-05-13 | 12754307 | ND |
| 2015-05-13 | 12754267 | ND |
| 2015-08-12 | 13140294 | ND |
| 2015-08-12 | 13140314 | ND |
| 2015-08-12 | 13140274 | ND |
| 2015-11-18 | 13518615 | ND |
| 2015-11-18 | 13518635 | ND |
| 2015-11-18 | 13518595 | ND |
| 2016-02-10 | 13874729 | ND |
| 2016-02-10 | 13874709 | ND |
| 2016-02-10 | 13874689 | ND |
| 2016-05-11 | 14257190 | ND |
| 2016-05-11 | 14257230 | ND |
| 2016-05-11 | 14257210 | ND |
| 2016-08-10 | 14741971 | ND |
| 2016-08-10 | 14742011 | ND |
| 2016-08-10 | 14741991 | ND |
| 2016-11-09 | 15231747 | ND |
| 2016-11-09 | 15231707 | ND |
| 2016-11-09 | 15231727 | ND |
| 2017-02-08 | 15662024 | ND |
| 2017-02-08 | 15662004 | ND |
| 2017-02-08 | 15661984 | ND |
| 2017-05-10 | 16101787 | ND |
| 2017-05-10 | 16101807 | ND |
| 2017-05-10 | 16100847 | ND |
| 2017-05-10 | 16100807 | ND |
| 2017-05-10 | 16101767 | ND |
| 2017-05-10 | 16100827 | ND |
| 2017-08-09 | 16572500 | ND |
| 2017-08-09 | 16572520 | ND |
| 2017-08-09 | 16572480 | ND |
| 2017-11-08 | 17029194 | ND |
| 2017-11-08 | 17029214 | ND |
| 2017-11-08 | 17029174 | ND |
| 2018-02-07 | DW180207-019 | ND |
| 2018-02-07 | DW180207-037 | ND |
| 2018-02-07 | DW180207-002 | ND |
| 2018-05-09 | DW180509-019 | ND |
| 2018-05-09 | DW180509-002 | ND |
| 2018-05-09 | DW180509-035 | ND |
| 2018-08-08 | DW180808-002 | ND |
| 2018-08-08 | 8083919-01 | ND |
| 2018-08-08 | 8083919-02 | ND |
| 2018-08-08 | DW180808-019 | ND |
| 2018-08-08 | 8083919-03 | ND |
| 2018-08-08 | DW180808-035 | ND |
| 2018-11-07 | DW181107-002 | ND |
| 2018-11-07 | DW181107-018 | ND |
| 2018-11-08 | DW181108-038 | ND |
| 2019-02-13 | DW190213-034 | ND |
| 2019-02-13 | DW190213-018 | ND |
| 2019-02-13 | DW190213-002 | ND |
| 2019-05-15 | DW190515-035 | ND |
| 2019-05-15 | DW190515-019 | ND |
| 2019-05-15 | DW190515-002 | ND |
| 2019-08-14 | 9084421-06 | ND |
| 2019-08-14 | 9084421-07 | ND |
| 2019-08-14 | 9084421-08 | ND |
| 2019-11-13 | DW191113-019 | ND |
| 2019-11-13 | DW191113-035 | ND |
| 2019-11-13 | DW191113-002 | ND |