1,1-Dichloroethylene
Montgomery County Municipal Utility District 99
1,1-Dichloroethylene is used for plastics production. It damages DNA and causes cancer in laboratory animal studies.
9
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 | N/A | 0 | 0 | N/A |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 1 | 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 |
|---|---|---|
| 2015-07-20 | AD00169 | ND |
| 2016-12-07 | AD60914 | ND |
| 2017-09-06 | AD94921 | ND |
| 2018-07-25 | AE34532 | ND |
| 2018-07-25 | AE34538 | ND |
| 2018-10-17 | AE43796 | ND |
| 2019-02-13 | AE54373 | ND |
| 2019-02-13 | AE54361 | ND |
| 2019-05-21 | AE67396 | ND |