trans-1,2-Dichloroethylene
Sfpuc-pleasanton Wells
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 | 2 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 2 | 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 |
|---|---|---|
| 2018-06-18 | CA0110018_004_004-201806181217 | ND |
| 2018-06-18 | CA0110018_005_005-201806181151 | ND |
| 2019-06-17 | CA0110018_005_005-201906170900 | ND |
| 2019-06-26 | CA0110018_004_004-201906261235 | ND |
| 2020-06-16 | CA0110018_004_004-202006160834 | ND |
| 2020-06-16 | CA0110018_005_005-202006160922 | ND |
| 2021-06-23 | CA0110018_005_005-202106231035 | ND |
| 2022-06-14 | CA0110018_005_005-202206140840 | ND |
| 2022-06-14 | CA0110018_004_004-202206140920 | ND |
| 2023-06-22 | CA0110018_004_004-202306220911 | ND |
| 2023-09-14 | CA0110018_005_005-202309140950 | ND |