1,1-Dichloroethylene
Hca Roan Filter Plant
1,1-Dichloroethylene is used for plastics production. It damages DNA and causes cancer in laboratory animal studies.
14
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 | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 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 | Lab ID | Result |
|---|---|---|
| 2018-10-30 | 8111439-01 | ND |
| 2019-10-24 | 9105284-01 | ND |
| 2020-06-17 | 22436155.00 | ND |
| 2020-10-19 | 23201736.00 | ND |
| 2021-01-07 | 23731036.00 | ND |
| 2021-04-08 | 24266641.00 | ND |
| 2021-07-01 | 24848284.00 | ND |
| 2021-10-20 | 25424854.00 | ND |
| 2022-05-26 | 26669374.00 | ND |
| 2023-02-28 | 28541389.00 | ND |
| 2023-05-02 | 28921499.00 | ND |
| 2023-05-24 | 28921755.00 | ND |
| 2023-08-22 | 29719416.00 | ND |
| 2023-11-14 | 30089982.00 | ND |