cis-1,2-Dichloroethylene
Patterson Water System
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.
14
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 | 2 | 0 | ND |
| 2019 | ND | 6 | 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
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 |
|---|---|---|
| 2018-01-25 | 35370415002 | ND |
| 2018-01-25 | 35370415002 | ND |
| 2019-01-15 | 35442674001 | ND |
| 2019-01-15 | 35442674001 | ND |
| 2019-07-24 | 35484856001 | ND |
| 2019-07-24 | 35484856001 | ND |
| 2019-10-22 | 35507344001 | ND |
| 2019-10-22 | 35507344001 | ND |
| 2020-01-07 | 35522572001 | ND |
| 2020-01-07 | 35522572002 | ND |
| 2020-04-14 | 35544199001 | ND |
| 2021-03-25 | 35621782001 | ND |
| 2022-01-06 | 35688920001 | ND |
| 2023-01-30 | 35776512001 | ND |