trans-1,2-Dichloroethylene
Blaine
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 | 6 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | ND | 11 | 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 |
|---|---|---|
| 2018-02-28 | 18B1345-02 | ND |
| 2018-02-28 | 18B1345-01 | ND |
| 2018-06-22 | 18F1667-01 | ND |
| 2018-07-16 | 18G0768-01 | ND |
| 2018-07-16 | 18G0770-01 | ND |
| 2018-10-29 | 18J1451-01 | ND |
| 2019-08-01 | 19H0056-01 | ND |
| 2019-10-30 | 19J1701-01 | ND |
| 2020-08-31 | 20H2386-01 | ND |
| 2021-02-03 | 21B0180-01 | ND |
| 2021-02-03 | 21B0180-02 | ND |
| 2021-10-26 | 21J1368-01 | ND |
| 2021-12-17 | 21L0753-01 | ND |
| 2022-02-17 | 22B1198-01 | ND |
| 2022-06-21 | 22F1270-01 | ND |
| 2022-09-21 | 22I1864-01 | ND |
| 2022-09-21 | 22I1868-01 | ND |
| 2023-03-17 | 23C0874-01 | ND |
| 2023-05-23 | 23E2466-01 | ND |
| 2023-08-18 | 23H2091-01 | ND |
| 2023-08-18 | 23H2092-02 | ND |
| 2023-08-18 | 23H2092-03 | ND |
| 2023-08-18 | 23H2092-04 | ND |
| 2023-08-18 | 23H2092-05 | ND |
| 2023-08-18 | 23H2092-06 | ND |
| 2023-09-15 | 23I0865-01 | ND |
| 2023-10-13 | 23J0648-01 | ND |
| 2023-10-13 | 23J0648-02 | ND |