cis-1,2-Dichloroethylene
Quincy Water Department 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.
13
Samples
0
Samples exceeding legal limit (MCL)
0
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 | N/A | 0 | 0 | N/A |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 7 | 0 | ND |
| 2023 | ND | 3 | 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
| Date | Lab ID | Result |
|---|---|---|
| 2019-10-02 | ND | |
| 2021-06-16 | 4132530 | ND |
| 2021-06-16 | 4131878 | ND |
| 2022-03-04 | 4258466 | ND |
| 2022-03-22 | 4258506 | ND |
| 2022-08-16 | 4338187 | ND |
| 2022-08-16 | 4338185 | ND |
| 2022-09-13 | 4344891 | ND |
| 2022-10-06 | 4356344 | ND |
| 2022-10-06 | 4356345 | ND |
| 2023-03-09 | 4427806 | ND |
| 2023-09-26 | 4526082 | ND |
| 2023-10-03 | 4526155 | ND |