cis-1,2-Dichloroethylene
City of Hollister
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.
10
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 | N/A | 0 | 0 | N/A |
| 2020 | ND | 5 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 5 | 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 |
|---|---|---|
| 2020-05-14 | CA3510001_002_002-202005140930 | ND |
| 2020-05-14 | CA3510001_001_001-202005140935 | ND |
| 2020-05-14 | CA3510001_005_005-202005140840 | ND |
| 2020-05-14 | CA3510001_007_007-202005140830 | ND |
| 2020-06-03 | CA3510001_006_006-202006031154 | ND |
| 2023-02-15 | CA3510001_001_001-202302150855 | ND |
| 2023-02-15 | CA3510001_007_007-202302151100 | ND |
| 2023-02-15 | CA3510001_006_006-202302151045 | ND |
| 2023-02-15 | CA3510001_002_002-202302150925 | ND |
| 2023-02-15 | CA3510001_005_005-202302151010 | ND |