trans-1,2-Dichloroethylene
Scott City, City of
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 | 2 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 3 | 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 |
|---|---|---|
| 2018-03-26 | 937883 | ND |
| 2018-05-21 | 973581 | ND |
| 2018-08-20 | 1028571 | ND |
| 2018-11-28 | 1082091 | ND |
| 2019-02-25 | 1125833 | ND |
| 2019-05-20 | 1157472 | ND |
| 2020-04-07 | 1351465 | ND |
| 2020-08-05 | 1474913 | ND |
| 2020-08-05 | 1474914 | ND |
| 2021-04-14 | 1818245 | ND |
| 2023-08-07 | 2551936 | ND |
| 2023-08-07 | 2551938 | ND |
| 2023-10-16 | 2596106 | ND |