cis-1,2-Dichloroethylene
Harris County Municipal Utility District 109
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 |
|---|---|---|---|---|
| 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 | 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 |
|---|---|---|
| 2015-07-06 | AC98447 | ND |
| 2015-07-06 | AC98429 | ND |
| 2016-03-09 | AD27927 | ND |
| 2016-12-05 | AD60385 | ND |
| 2017-01-06 | AD63631 | ND |
| 2017-04-21 | AD80689 | ND |
| 2018-01-31 | AE11597 | ND |
| 2018-01-31 | AE11595 | ND |
| 2019-02-14 | AE54626 | ND |
| 2019-11-22 | AE90390 | ND |