cis-1,2-Dichloroethylene
Harris County Municipal Utility District 5
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.
9
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 | ND | 1 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 3 | 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 |
|---|---|---|
| 2018-05-02 | AE24843 | ND |
| 2019-02-06 | AE53204 | ND |
| 2020-02-21 | AE99549 | ND |
| 2021-02-02 | AF42236 | ND |
| 2022-09-16 | AG13632 | ND |
| 2022-11-30 | AG20307 | ND |
| 2023-02-13 | AG28599 | ND |
| 2023-05-09 | AG39751 | ND |
| 2023-08-22 | AG53541 | ND |