trans-1,2-Dichloroethylene
Hartford
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 | 4 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 1 | 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 |
|---|---|---|
| 2018-01-15 | 8012323-01 | ND |
| 2018-05-15 | 8052957-01 | ND |
| 2018-07-23 | 8074417-01 | ND |
| 2018-10-16 | 8103480-01 | ND |
| 2019-01-14 | 9012448-01 | ND |
| 2019-05-20 | 9054161-01 | ND |
| 2019-07-16 | 9073599-01 | ND |
| 2019-11-18 | 9113327-01 | ND |
| 2020-01-27 | 0014692-01 | ND |
| 2020-05-20 | 0053840-01 | ND |
| 2020-08-11 | 0082578-01 | ND |
| 2021-09-21 | EI04364-01 | ND |
| 2022-08-31 | FI00240-01 | ND |
| 2023-07-24 | GG04303-01 | ND |