1,1-Dichloroethylene
Coraopolis Water & Sewer Authority
1,1-Dichloroethylene is used for plastics production. It damages DNA and causes cancer in laboratory animal studies.
12
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 | 0.500 ppb | 1 | 1 | 0.500 ppb |
| 2019 | 0.600 ppb | 1 | 1 | 0.600 ppb |
| 2020 | 0.500 ppb | 3 | 2 | ND - 0.800 ppb |
| 2021 | 0.200 ppb | 3 | 1 | ND - 0.600 ppb |
| 2022 | 0.617 ppb | 3 | 3 | 0.530 ppb - 0.720 ppb |
| 2023 | ND | 1 | 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 |
|---|---|---|
| 2018-05-14 | 8054022-01 | 0.500 ppb |
| 2019-05-30 | 9055519-01 | 0.600 ppb |
| 2020-04-07 | 22115703.00 | 0.800 ppb |
| 2020-05-19 | 22308736.00 | 0.700 ppb |
| 2020-10-19 | 23269389.00 | ND |
| 2021-06-28 | 24921595.00 | 0.600 ppb |
| 2021-10-01 | 25308355.00 | ND |
| 2021-10-01 | 25308374.00 | ND |
| 2022-03-01 | 28679726.00 | 0.530 ppb |
| 2022-05-24 | 28429825.00 | 0.720 ppb |
| 2022-09-16 | 27539238.00 | 0.600 ppb |
| 2023-06-05 | 29204046.00 | ND |