cis-1,2-Dichloroethylene
San Antonio Water System Northeast
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.
13
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 1 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 2 | 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 |
|---|---|---|
| 2014-09-02 | AC65451 | ND |
| 2015-07-08 | AC98749 | ND |
| 2015-07-08 | AC98753 | ND |
| 2015-07-08 | AC98747 | ND |
| 2015-07-09 | AC98996 | ND |
| 2017-12-04 | AE06578 | ND |
| 2017-12-13 | AE07674 | ND |
| 2018-03-15 | AE18626 | ND |
| 2018-03-26 | AE19964 | ND |
| 2018-05-10 | AE25965 | ND |
| 2018-05-10 | AE25967 | ND |
| 2019-04-22 | AE63213 | ND |
| 2019-04-22 | AE63205 | ND |