1,1-Dichloroethylene
Galveston County Water Control and Improvement District 12
NOTE: Galveston County Water Control and Improvement District 12 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 |
|---|---|---|---|---|
| 2014 | ND | 2 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
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 12 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 |
|---|---|---|
| 2014-07-18 | AC60287 | ND |
| 2015-07-06 | AC98433 | ND |
| 2016-09-29 | AD52080 | ND |
| 2017-07-21 | AD90384 | ND |
| 2018-07-11 | AE32989 | ND |
| 2019-07-29 | AE76192 | ND |