1,1-Dichloroethylene
Hoschton Water System
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 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | 3.58 ppb | 4 | 4 | 2.80 ppb - 4.40 ppb |
| 2021 | 1.48 ppb | 6 | 4 | ND - 2.90 ppb |
| 2022 | 1.25 ppb | 2 | 1 | ND - 2.50 ppb |
| 2023 | 0.550 ppb | 2 | 1 | ND - 1.10 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 |
|---|---|---|
| 2020-01-27 | AK40287 | 3.30 ppb |
| 2020-04-27 | AK45053 | 4.40 ppb |
| 2020-07-23 | AK52378 | 2.80 ppb |
| 2020-10-21 | AK63047 | 3.80 ppb |
| 2021-01-28 | AK68443 | 2.40 ppb |
| 2021-05-11 | AK74949 | 2.10 ppb |
| 2021-07-27 | AK81369 | 2.90 ppb |
| 2021-07-27 | AK81370 | ND |
| 2021-10-19 | AK89324 | 1.50 ppb |
| 2021-10-19 | AK89325 | ND |
| 2022-01-31 | AK94378 | 2.50 ppb |
| 2022-01-31 | AK94379 | ND |
| 2023-03-28 | AL27992 | 1.10 ppb |
| 2023-03-28 | AL27993 | ND |