trans-1,2-Dichloroethylene
Grissom Farm S/d
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 | 4 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 1 | 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 |
|---|---|---|
| 2018-01-24 | CA18287-01 | ND |
| 2018-04-09 | CB03354-01 | ND |
| 2018-07-17 | CB08156-01 | ND |
| 2018-10-16 | CB14344-01 | ND |
| 2019-04-10 | CC04158-01 | ND |
| 2019-07-30 | CC10583-01 | ND |
| 2019-10-15 | CC15834-01 | ND |
| 2020-01-02 | CC21269-01 | ND |
| 2020-10-22 | CD13671-01 | ND |
| 2021-01-18 | CD18603-01 | ND |
| 2022-01-26 | CE17802-01 | ND |
| 2023-01-18 | 752-1491-1 | ND |
| 2023-10-26 | 37729_23-60702 | ND |