1,1-Dichloroethylene
Montmorenci Water District
1,1-Dichloroethylene is used for plastics production. It damages DNA and causes cancer in laboratory animal studies.
24
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 | 1.26 ppb | 4 | 4 | 0.900 ppb - 1.64 ppb |
| 2019 | 1.05 ppb | 4 | 4 | 0.700 ppb - 1.32 ppb |
| 2020 | 0.905 ppb | 4 | 4 | 0.700 ppb - 1.11 ppb |
| 2021 | 0.829 ppb | 4 | 4 | 0.750 ppb - 0.975 ppb |
| 2022 | 0.698 ppb | 5 | 4 | ND - 1.07 ppb |
| 2023 | 0.845 ppb | 3 | 3 | 0.700 ppb - 0.930 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 |
|---|---|---|
| 2018-02-27 | AE08322 | 1.24 ppb |
| 2018-05-23 | AE12655 | 1.25 ppb |
| 2018-08-22 | AE17063 | 0.900 ppb |
| 2018-11-13 | AE21220 | 1.64 ppb |
| 2019-02-20 | AE26033 | 1.06 ppb |
| 2019-04-30 | AE29543 | 1.13 ppb |
| 2019-08-27 | AE36167 | 0.700 ppb |
| 2019-11-05 | AE39706 | 1.32 ppb |
| 2020-01-14 | AE42850 | 0.800 ppb |
| 2020-04-08 | AE47044 | 0.700 ppb |
| 2020-08-25 | AE53392 | 1.11 ppb |
| 2020-10-07 | AE55472 | 1.01 ppb |
| 2021-02-03 | AE60574 | 0.830 ppb |
| 2021-04-07 | AE63774 | 0.750 ppb |
| 2021-08-25 | AE71041 | 0.760 ppb |
| 2021-11-09 | AE74852 | 0.975 ppb |
| 2022-02-23 | AE79524 | 1.07 ppb |
| 2022-04-07 | AE81832 | 0.660 ppb |
| 2022-04-07 | AE81833 | ND |
| 2022-08-24 | AE88862 | 0.960 ppb |
| 2022-11-02 | AE92454 | 0.800 ppb |
| 2023-02-01 | AE96329 | 0.905 ppb |
| 2023-04-05 | AE99712 | 0.700 ppb |
| 2023-10-04 | AF09676 | 0.930 ppb |