trans-1,2-Dichloroethylene
Lockesburg Waterworks
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 | 2 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 3 | 0 | ND |
| 2023 | ND | 2 | 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 |
|---|---|---|
| 2018-07-24 | 18207001201 | ND |
| 2019-02-04 | 19038002601 | ND |
| 2019-08-19 | 19233000908 | ND |
| 2020-02-03 | 20037001701 | ND |
| 2020-08-17 | 20233006101 | ND |
| 2021-01-27 | 21028010701 | ND |
| 2022-01-11 | 22013001901 | ND |
| 2022-04-06 | O196357-VOC-1 | ND |
| 2022-07-19 | O199847-VOC-1 | ND |
| 2023-02-07 | O206091-VOC-1 | ND |
| 2023-07-31 | O211163-VOC-1 | ND |