1,1-Dichloroethylene
Galveston County Water Control and Improvement District 8
NOTE: Galveston County Water Control and Improvement District 8 purchases water from Gulf Coast Water Authority Tx City which is required to test for 1,1-dichloroethylene. Sample information shown below was taken by Gulf Coast Water Authority Tx City.
1,1-Dichloroethylene is used for plastics production. It damages DNA and causes cancer in laboratory animal studies.
Samples
Samples exceeding legal limit (MCL)
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 | 1 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 1 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EPA Maximum Contaminant
Level (MCL): 7 ppb
The legal limit for 1,1-dichloroethylene, established in 1987, was based on a toxicity study conducted in laboratory animals in the 1980s.
ppb = parts per billion
All test results
NOTE: Galveston County Water Control and Improvement District 8 purchases water from Gulf Coast Water Authority Tx City which is required to test for 1,1-dichloroethylene. Sample information shown below was taken by Gulf Coast Water Authority Tx City.
| Date | Lab ID | Result |
|---|---|---|
| 2018-07-11 | AE32989 | ND |
| 2019-07-29 | AE76192 | ND |
| 2020-07-15 | AF19499 | ND |
| 2021-07-16 | AF62454 | ND |
| 2022-07-22 | AG06107 | ND |
| 2023-07-13 | AG48515 | ND |