1,1,1-Trichloroethane
Coraopolis Water & Sewer Authority
1,1,1-Trichloroethane is a solvent and a degreasing agent used for manufacturing metal products and as ingredient in cleaners and aerosols. Exposure to 1,1,1-trichloroethane can harm the nervous system, liver and circulatory system.
13
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 | 2.60 ppb | 1 | 1 | 2.60 ppb |
| 2019 | 3.00 ppb | 1 | 1 | 3.00 ppb |
| 2020 | 2.77 ppb | 3 | 3 | 2.40 ppb - 3.20 ppb |
| 2021 | 1.75 ppb | 4 | 4 | 1.40 ppb - 2.60 ppb |
| 2022 | 1.93 ppb | 3 | 3 | 1.60 ppb - 2.10 ppb |
| 2023 | 2.10 ppb | 1 | 1 | 2.10 ppb |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EPA Maximum Contaminant
Level (MCL): 200 ppb
The legal limit for 1,1,1-trichloroethane, established in 1987, was based on toxicity studies conducted in laboratory animals in the 1970s and 1980s.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-05-14 | 8054022-01 | 2.60 ppb |
| 2019-05-30 | 9055519-01 | 3.00 ppb |
| 2020-04-07 | 22115706.00 | 3.20 ppb |
| 2020-05-19 | 22308739.00 | 2.40 ppb |
| 2020-10-19 | 23269392.00 | 2.70 ppb |
| 2021-06-28 | 24921598.00 | 2.60 ppb |
| 2021-10-01 | 25308358.00 | 1.40 ppb |
| 2021-10-01 | 25308377.00 | 1.40 ppb |
| 2021-12-22 | 25850476.00 | 1.60 ppb |
| 2022-03-01 | 26197367.00 | 1.60 ppb |
| 2022-05-24 | 26742046.00 | 2.10 ppb |
| 2022-09-16 | 27539241.00 | 2.10 ppb |
| 2023-06-05 | 29204049.00 | 2.10 ppb |