cis-1,2-Dichloroethylene
Columbia Water Company
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.
12
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 | ND | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 4 | 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 |
|---|---|---|
| 2018-04-02 | 2306480001 | ND |
| 2019-04-10 | 9042204-01 | ND |
| 2020-04-07 | 22172645.00 | ND |
| 2020-04-07 | 22172666.00 | ND |
| 2020-04-13 | 22172767.00 | ND |
| 2020-04-23 | 22173047.00 | ND |
| 2021-04-12 | 24395228.00 | ND |
| 2022-04-11 | 26608856.00 | ND |
| 2023-03-06 | 28662964.00 | ND |
| 2023-04-03 | 28859657.00 | ND |
| 2023-04-17 | 29061112.00 | ND |
| 2023-04-17 | 28859827.00 | ND |