1,1-Dichloroethylene
City of Hallettsville
1,1-Dichloroethylene is used for plastics production. It damages DNA and causes cancer in laboratory animal studies.
20
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 | ND | 3 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 3 | 0 | ND |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 3 | 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
| Date | Lab ID | Result |
|---|---|---|
| 2014-01-14 | AC38768 | ND |
| 2014-01-14 | AC38762 | ND |
| 2014-10-27 | AC70534 | ND |
| 2015-03-26 | AC86249 | ND |
| 2015-03-26 | AC86303 | ND |
| 2015-03-26 | AC86299 | ND |
| 2015-06-09 | AC95146 | ND |
| 2016-03-08 | AD27589 | ND |
| 2016-03-08 | AD27591 | ND |
| 2016-03-08 | AD27571 | ND |
| 2016-03-18 | AD29919 | ND |
| 2017-12-06 | AE06982 | ND |
| 2017-12-06 | AE06984 | ND |
| 2017-12-06 | AE06986 | ND |
| 2018-09-19 | AE40775 | ND |
| 2018-09-19 | AE40773 | ND |
| 2018-09-19 | AE40759 | ND |
| 2019-08-22 | AE80240 | ND |
| 2019-08-22 | AE80246 | ND |
| 2019-08-22 | AE80242 | ND |