1,1-Dichloroethylene
Lake Marian Resort
1,1-Dichloroethylene is used for plastics production. It damages DNA and causes cancer in laboratory animal studies.
11
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 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 4 | 0 | ND |
| 2022 | 0.250 ppb | 2 | 1 | ND - 0.500 ppb |
| 2023 | ND | 5 | 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
| Date | Result |
|---|---|
| 2021-02-22 | ND |
| 2021-08-09 | ND |
| 2021-09-01 | ND |
| 2021-11-03 | ND |
| 2022-01-26 | 0.500 ppb |
| 2022-08-17 | ND |
| 2023-02-08 | ND |
| 2023-06-20 | ND |
| 2023-07-18 | ND |
| 2023-07-18 | ND |
| 2023-10-16 | ND |