1,1-Dichloroethylene
City of Concord
1,1-Dichloroethylene is used for plastics production. It damages DNA and causes cancer in laboratory animal studies.
12
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 | 2 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 2 | 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 |
|---|---|---|
| 2014-01-15 | 8221-011514-EP1V | ND |
| 2014-01-15 | 8221-011514-EP2V | ND |
| 2015-01-14 | ND | |
| 2015-01-14 | ND | |
| 2016-01-26 | 3391022 | ND |
| 2016-01-26 | 3391002 | ND |
| 2017-01-23 | 3625435 | ND |
| 2017-01-23 | 3625440 | ND |
| 2018-01-30 | 3861468 | ND |
| 2018-01-30 | 3861484 | ND |
| 2019-02-04 | 4187564 | ND |
| 2019-02-04 | 4187620 | ND |