cis-1,2-Dichloroethylene
St. Clair Township
NOTE: St. Clair Township purchases water from St. Clair, City of which is required to test for cis-1,2-dichloroethylene. Sample information shown below was taken by St. Clair, 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 | N/A | 0 | 0 | N/A |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 1 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EPA Maximum Contaminant
Level (MCL): 70 ppb
The legal limit for cis-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
NOTE: St. Clair Township purchases water from St. Clair, City of which is required to test for cis-1,2-dichloroethylene. Sample information shown below was taken by St. Clair, City of.
| Date | Lab ID | Result |
|---|---|---|
| 2020-08-10 | ND | |
| 2021-08-17 | ND | |
| 2022-05-03 | ND | |
| 2022-08-04 | ND | |
| 2023-05-02 | ND |