trans-1,2-Dichloroethylene
Duncannon Municipal Water
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 | 2 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 6 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 4 | 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 |
|---|---|---|
| 2018-08-22 | 8H23016-02 | ND |
| 2018-11-13 | 8K15056-01 | ND |
| 2019-08-19 | 9080661-01 | ND |
| 2020-03-30 | 21991374.00 | ND |
| 2020-03-30 | 21991375.00 | ND |
| 2020-03-30 | 21991376.00 | ND |
| 2020-08-04 | 22967121.00 | ND |
| 2021-02-15 | 24027742.00 | ND |
| 2021-03-08 | 24214575.00 | ND |
| 2021-03-22 | 24214642.00 | ND |
| 2021-06-01 | 24798984.00 | ND |
| 2021-08-03 | 25189163.00 | ND |
| 2021-12-28 | 25914150.00 | ND |
| 2022-10-26 | 27795520.00 | ND |
| 2023-07-31 | 29465060.00 | ND |
| 2023-07-31 | 29465029.00 | ND |
| 2023-07-31 | 29465080.00 | ND |
| 2023-07-31 | 29465009.00 | ND |