cis-1,2-Dichloroethylene
Bear Valley Joint Authority
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.
17
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 | 4 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 2 | 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 |
|---|---|---|
| 2018-05-29 | (102) | ND |
| 2018-07-17 | (102) | ND |
| 2018-10-16 | (101) TREATM | ND |
| 2018-11-27 | (102) | ND |
| 2019-02-19 | (102) | ND |
| 2019-11-06 | 9K07106-01 | ND |
| 2019-12-17 | 9L18235-01 | ND |
| 2020-01-29 | 21624694.00 | ND |
| 2020-04-15 | 22165869.00 | ND |
| 2020-07-29 | 22750945.00 | ND |
| 2020-09-23 | 23137058.00 | ND |
| 2021-09-28 | 25358594.00 | ND |
| 2021-09-28 | 25358627.00 | ND |
| 2022-09-14 | 27594682.00 | ND |
| 2022-10-13 | 27779633.00 | ND |
| 2023-09-06 | 29840898.00 | ND |
| 2023-09-06 | 29840932.00 | ND |