trans-1,2-Dichloroethylene
Pennsylvania American Water Company Yardley
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 | 3 | 0 | ND |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 3 | 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 |
|---|---|---|
| 2014-04-02 | 25324901 | ND |
| 2014-08-05 | 26501001 | ND |
| 2014-08-05 | 26500201 | ND |
| 2015-04-01 | 12620828 | ND |
| 2015-08-12 | 13123102 | ND |
| 2015-08-12 | 13123068 | ND |
| 2016-04-05 | 14089335 | ND |
| 2016-08-04 | 14719952 | ND |
| 2016-08-04 | 14719931 | ND |
| 2017-04-06 | 15922057 | ND |
| 2017-08-02 | 16550794 | ND |
| 2017-09-29 | 16712945 | ND |
| 2017-10-31 | 16866930 | ND |
| 2018-04-11 | 39062701 | ND |
| 2018-08-14 | 40630801 | ND |
| 2018-08-14 | 40630201 | ND |
| 2019-04-04 | 43649801 | ND |
| 2019-08-22 | 45815901 | ND |
| 2019-08-22 | 45816001 | ND |