1,1-Dichloroethylene
Guilford Water Authority
1,1-Dichloroethylene is used for plastics production. It damages DNA and causes cancer in laboratory animal studies.
20
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 | 3 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | ND | 5 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 7 | 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 |
|---|---|---|
| 2018-05-29 | (104) | ND |
| 2018-09-04 | (104) | ND |
| 2018-12-11 | (104) | ND |
| 2019-03-05 | (104) | ND |
| 2020-11-02 | 23491226.00 | ND |
| 2020-11-02 | 23491205.00 | ND |
| 2020-11-02 | 23491184.00 | ND |
| 2021-03-09 | 24197197.00 | ND |
| 2021-03-09 | 24197218.00 | ND |
| 2021-03-29 | 24197240.00 | ND |
| 2021-03-29 | 24197261.00 | ND |
| 2021-11-04 | 25719754.00 | ND |
| 2022-04-25 | 26601195.00 | ND |
| 2023-05-17 | 29053145.00 | ND |
| 2023-05-17 | 29053166.00 | ND |
| 2023-05-24 | 29053216.00 | ND |
| 2023-05-24 | 29053195.00 | ND |
| 2023-08-01 | 29447931.00 | ND |
| 2023-08-01 | 29447951.00 | ND |
| 2023-08-01 | 29447911.00 | ND |