1,1-Dichloroethylene
East Hampton WPCA - Village Center
1,1-Dichloroethylene is used for plastics production. It damages DNA and causes cancer in laboratory animal studies.
29
Samples
2
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 | 4 | 0 | ND |
| 2019 | 0.840 ppb | 5 | 1 | ND - 4.20 ppb |
| 2020 | 0.440 ppb | 5 | 1 | ND - 2.20 ppb |
| 2021 | 1.16 ppb | 5 | 1 | ND - 5.80 ppb |
| 2022 | 1.78 ppb | 5 | 1 | ND - 8.90 ppb |
| 2023 | 1.78 ppb | 5 | 1 | ND - 8.90 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 |
|---|---|---|
| 2018-01-30 | 115734GE | ND |
| 2018-05-07 | 117532GE | ND |
| 2018-07-10 | 118761GE | ND |
| 2018-10-23 | 120892 | ND |
| 2019-01-15 | 122347 | ND |
| 2019-04-16 | 124067 | ND |
| 2019-07-15 | 126044 | 4.20 ppb |
| 2019-09-17 | 127562 | ND |
| 2019-11-19 | 128973 | ND |
| 2020-02-04 | 130248 | ND |
| 2020-04-07 | 131452 | ND |
| 2020-07-20 | 133618 | 2.20 ppb |
| 2020-09-01 | 134519 | ND |
| 2020-11-03 | 135933 | ND |
| 2021-01-25 | 137562 | ND |
| 2021-05-11 | 139690 | ND |
| 2021-07-27 | 141331 | 5.80 ppb |
| 2021-09-21 | 142543 | ND |
| 2021-12-28 | 144446 | ND |
| 2022-03-29 | 146620 | ND |
| 2022-06-21 | 148919 | ND |
| 2022-07-25 | 149797 | 8.90 ppb |
| 2022-09-20 | 151363 | ND |
| 2022-12-21 | 154119 | ND |
| 2023-03-15 | 156497 | ND |
| 2023-06-06 | 159159 | ND |
| 2023-07-28 | 161409 | 8.90 ppb |
| 2023-09-28 | 163602 | ND |
| 2023-12-28 | 166835 | ND |