trans-1,2-Dichloroethylene
Solano Irrigation District - Pleasant Hills Ranch
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 | 5 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 1 | 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 |
|---|---|---|
| 2018-03-13 | CA4810025_001_001-201803130825 | ND |
| 2018-03-13 | CA4810025_003_003-201803130855 | ND |
| 2018-05-10 | CA4810025_004_004-201805101015 | ND |
| 2018-08-23 | CA4810025_004_004-201808230920 | ND |
| 2018-11-15 | CA4810025_004_004-201811151120 | ND |
| 2019-03-11 | CA4810025_001_001-201903111000 | ND |
| 2019-03-11 | CA4810025_003_003-201903110810 | ND |
| 2020-03-10 | CA4810025_001_001-202003101005 | ND |
| 2020-03-10 | CA4810025_003_003-202003101130 | ND |
| 2021-03-25 | CA4810025_003_003-202103251020 | ND |
| 2021-03-25 | CA4810025_003_003-202103251152 | ND |
| 2022-03-15 | CA4810025_001_001-202203150844 | ND |
| 2022-03-15 | CA4810025_003_003-202203150932 | ND |
| 2023-03-16 | CA4810025_001_001-202303160950 | ND |