1,1-Dichloroethylene
City of Friendswood
1,1-Dichloroethylene is used for plastics production. It damages DNA and causes cancer in laboratory animal studies.
26
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 2 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 6 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 6 | 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 |
|---|---|---|
| 2014-02-20 | AC43875 | ND |
| 2014-02-20 | AC43867 | ND |
| 2015-02-05 | AC79512 | ND |
| 2015-02-05 | AC79510 | ND |
| 2015-02-05 | AC79506 | ND |
| 2015-02-05 | AC79514 | ND |
| 2016-02-04 | AD22119 | ND |
| 2016-02-04 | AD22173 | ND |
| 2016-02-04 | AD22161 | ND |
| 2016-02-04 | AD22177 | ND |
| 2016-09-28 | AD51724 | ND |
| 2016-10-26 | AD54839 | ND |
| 2017-01-19 | AD65743 | ND |
| 2017-01-19 | AD65723 | ND |
| 2017-01-19 | AD65721 | ND |
| 2017-05-03 | AD82490 | ND |
| 2018-01-29 | AE11006 | ND |
| 2018-05-21 | AE27042 | ND |
| 2018-05-21 | AE27044 | ND |
| 2018-09-17 | AE40251 | ND |
| 2019-02-04 | AE52712 | ND |
| 2019-02-04 | AE52710 | ND |
| 2019-02-04 | AE52716 | ND |
| 2019-02-04 | AE52718 | ND |
| 2019-04-22 | AE63211 | ND |
| 2019-07-15 | AE74435 | ND |