cis-1,2-Dichloroethylene
San Juan Vista
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 | ND | 1 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | ND | 3 | 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 |
|---|---|---|
| 2018-05-23 | CA3901215_001_001-201805231202 | ND |
| 2020-02-10 | CA3901215_001_001-202002101422 | ND |
| 2020-05-18 | CA3901215_001_001-202005181050 | ND |
| 2020-08-12 | CA3901215_001_001-202008121113 | ND |
| 2021-08-04 | CA3901215_001_001-202108041053 | ND |
| 2021-11-05 | CA3901215_001_001-202111051535 | ND |
| 2022-02-09 | CA3901215_001_001-202202091149 | ND |
| 2022-08-08 | CA3901215_001_001-202208081215 | ND |
| 2023-08-17 | CA3901215_001_001-202308171040 | ND |
| 2023-11-08 | CA3901215_001_001-202311081325 | ND |