1,1-Dichloroethylene
East Hampton WPCA - Royal Oaks System
1,1-Dichloroethylene is used for plastics production. It damages DNA and causes cancer in laboratory animal studies.
17
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 |
|---|---|---|---|---|
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | 0.200 ppb | 3 | 1 | ND - 0.600 ppb |
| 2022 | ND | 3 | 0 | ND |
| 2023 | 0.767 ppb | 3 | 1 | ND - 2.30 ppb |
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
| Date | Lab ID | Result |
|---|---|---|
| 2018-03-13 | 116550GE | ND |
| 2018-03-13 | 116549GE | ND |
| 2019-07-12 | 126042 | ND |
| 2019-09-24 | 127776 | ND |
| 2019-09-24 | 127777 | ND |
| 2020-02-25 | 130648 | ND |
| 2020-02-25 | 130649 | ND |
| 2020-07-20 | 133620 | ND |
| 2021-07-27 | 141333 | 0.600 ppb |
| 2021-12-28 | 144447 | ND |
| 2021-12-28 | 144448 | ND |
| 2022-07-25 | 149799 | ND |
| 2022-10-12 | 152056 | ND |
| 2022-10-12 | 152057 | ND |
| 2023-07-28 | 161411 | 2.30 ppb |
| 2023-09-28 | 163605 | ND |
| 2023-12-28 | 166829 | ND |