cis-1,2-Dichloroethylene
City of San Juan Capistrano
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | ND | 1 | 0 | ND |
2015 | ND | 3 | 0 | ND |
2016 | ND | 1 | 0 | ND |
2017 | ND | 1 | 0 | ND |
2018 | ND | 1 | 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 |
---|---|---|
2014-12-23 | 9590-010-1508 | ND |
2015-02-10 | 9590-010-1111 | ND |
2015-05-19 | 9590-010-0808 | ND |
2015-08-24 | 9590-010-0911 | ND |
2016-02-29 | 9590-010-0809 | ND |
2017-02-08 | 9590-010-0815 | ND |
2018-06-13 | 9590-010-1322 | ND |
2019-03-27 | 4792-010-0715 | ND |
2019-07-08 | 4792-010-1215 | ND |
2019-10-15 | 4792-010-1230 | ND |