trans-1,2-Dichloroethylene
Perkasie Regional Authority
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 | 7 | 0 | ND |
| 2019 | ND | 7 | 0 | ND |
| 2020 | ND | 6 | 0 | ND |
| 2021 | ND | 7 | 0 | ND |
| 2022 | ND | 7 | 0 | ND |
| 2023 | ND | 7 | 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 |
|---|---|---|
| 2018-03-06 | 8024485-02 | ND |
| 2018-06-04 | 8052857-02 | ND |
| 2018-09-04 | 8084662-02 | ND |
| 2018-09-17 | 8093548-01 | ND |
| 2018-09-17 | 8093548-03 | ND |
| 2018-09-17 | 8093548-02 | ND |
| 2018-12-03 | 8110453-02RE | ND |
| 2019-03-05 | 9023322-02 | ND |
| 2019-06-04 | 9053891-02 | ND |
| 2019-09-03 | 9084135-02 | ND |
| 2019-11-11 | 9111441-02 | ND |
| 2019-11-11 | 9111441-03 | ND |
| 2019-11-11 | 9111441-01 | ND |
| 2019-12-03 | 9113323-02 | ND |
| 2020-03-03 | 21828163.00 | ND |
| 2020-06-23 | 22393766.00 | ND |
| 2020-09-01 | 22778500.00 | ND |
| 2020-09-01 | 22778458.00 | ND |
| 2020-09-01 | 22778479.00 | ND |
| 2020-12-01 | 23344558.00 | ND |
| 2021-03-02 | 24041340.00 | ND |
| 2021-06-01 | 24619520.00 | ND |
| 2021-09-20 | 25201404.00 | ND |
| 2021-09-20 | 25201446.00 | ND |
| 2021-09-20 | 25201425.00 | ND |
| 2021-09-20 | 25201467.00 | ND |
| 2021-12-07 | 25746109.00 | ND |
| 2022-03-01 | 26270338.00 | ND |
| 2022-06-21 | 26824210.00 | ND |
| 2022-08-16 | 27213702.00 | ND |
| 2022-08-16 | 27213750.00 | ND |
| 2022-08-16 | 27213727.00 | ND |
| 2022-09-19 | 27420630.00 | ND |
| 2022-12-06 | 27980842.00 | ND |
| 2023-03-07 | 28503191.00 | ND |
| 2023-06-06 | 29088302.00 | ND |
| 2023-09-05 | 29681640.00 | ND |
| 2023-09-19 | 29681643.00 | ND |
| 2023-09-19 | 29681642.00 | ND |
| 2023-09-19 | 29681641.00 | ND |
| 2023-12-05 | 30228260.00 | ND |