cis-1,2-Dichloroethylene
City of Orange
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.
11
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 |
|---|---|---|---|---|
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
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 |
|---|---|---|
| 2015-01-21 | AC77079 | ND |
| 2015-01-21 | AC77073 | ND |
| 2016-05-18 | AD37514 | ND |
| 2016-05-18 | AD37522 | ND |
| 2017-02-22 | AD71757 | ND |
| 2017-02-22 | AD71743 | ND |
| 2018-01-10 | AE08637 | ND |
| 2018-01-10 | AE08641 | ND |
| 2019-02-12 | AE54144 | ND |
| 2019-02-12 | AE54140 | ND |
| 2019-10-30 | AE87998 | ND |