trans-1,2-Dichloroethylene
Pennsylvania American Water Company Butler
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 |
|---|---|---|---|---|
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 6 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
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 |
|---|---|---|
| 2018-03-12 | 38836501 | ND |
| 2019-03-05 | 43248101 | ND |
| 2020-03-09 | 21939743.00 | ND |
| 2021-03-01 | 24158499.00 | ND |
| 2022-03-07 | 26380914.00 | ND |
| 2023-03-07 | 28618859.00 | ND |
| 2023-03-14 | 28618963.00 | ND |
| 2023-03-27 | 28618984.00 | ND |
| 2023-04-10 | 28809083.00 | ND |
| 2023-04-25 | 28809104.00 | ND |
| 2023-05-09 | 29010743.00 | ND |