1,1-Dichloroethylene
Quarryville Borough
NOTE: Quarryville Borough purchases water from Pennsylvania American Coatesville which is required to test for 1,1-dichloroethylene. Sample information shown below was taken by Pennsylvania American Coatesville.
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 |
|---|---|---|---|---|
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | ND | 4 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
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: Quarryville Borough purchases water from Pennsylvania American Coatesville which is required to test for 1,1-dichloroethylene. Sample information shown below was taken by Pennsylvania American Coatesville.
| Date | Lab ID | Result |
|---|---|---|
| 2018-01-09 | 38173701 | ND |
| 2019-02-06 | 43221201 | ND |
| 2020-01-21 | 21495926.00 | ND |
| 2021-01-07 | 23705349.00 | ND |
| 2022-01-06 | 25935030.00 | ND |
| 2023-01-03 | 28165652.00 | ND |