cis-1,2-Dichloroethylene
Northwest Harris County Municipal Utility District 19
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.
12
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 | 2 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 2 | 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 |
|---|---|---|
| 2018-05-17 | AE26819 | ND |
| 2018-05-17 | AE26823 | ND |
| 2019-11-07 | AE88931 | ND |
| 2019-11-07 | AE88937 | ND |
| 2020-10-01 | AF29290 | ND |
| 2020-10-01 | AF29300 | ND |
| 2021-06-10 | AF57515 | ND |
| 2021-06-10 | AF57537 | ND |
| 2022-05-17 | AF97248 | ND |
| 2022-05-17 | AF97250 | ND |
| 2023-07-20 | AG49615 | ND |
| 2023-07-20 | AG49637 | ND |