trans-1,2-Dichloroethylene
Mountain View Trailer Park
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 | 2 | 0 | ND |
| 2022 | ND | 5 | 0 | ND |
| 2023 | ND | 4 | 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 |
|---|---|---|
| 2018-04-04 | 18040775-02A | ND |
| 2018-04-04 | 18040775-03A | ND |
| 2019-04-09 | 19D0536-04 | ND |
| 2019-04-09 | 19D0536-02 | ND |
| 2020-04-07 | 20D0342-08 | ND |
| 2020-04-07 | 20D0342-04 | ND |
| 2021-05-20 | 21E1098-01 | ND |
| 2021-06-22 | 21F1301-01 | ND |
| 2022-04-27 | 22D1552-01 | ND |
| 2022-06-02 | 22F0177-01 | ND |
| 2022-09-21 | 22I1232-02 | ND |
| 2022-09-29 | 22I1465-01 | ND |
| 2022-12-07 | 22L0571-01 | ND |
| 2023-03-14 | 23C0976-01 | ND |
| 2023-06-13 | 23F0798-02 | ND |
| 2023-09-18 | 23I1038-01 | ND |
| 2023-12-12 | 23L0810-01-1 | ND |