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.
8
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 |
|---|---|---|---|---|
| 2014 | 3.66 ppb | 1 | 1 | 3.66 ppb |
| 2015 | 1.19 ppb | 2 | 1 | ND - 2.38 ppb |
| 2016 | 2.75 ppb | 2 | 2 | 2.50 ppb - 3.00 ppb |
| 2017 | 2.80 ppb | 1 | 1 | 2.80 ppb |
| 2018 | 2.60 ppb | 1 | 1 | 2.60 ppb |
| 2019 | 3.00 ppb | 1 | 1 | 3.00 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
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 |
|---|---|---|
| 2014-05-27 | 14060076-001 | 3.66 ppb |
| 2015-04-08 | 12691373 | 2.38 ppb |
| 2015-08-24 | 13197135 | ND |
| 2016-06-13 | 14486021 | 3.00 ppb |
| 2016-12-19 | 15441877 | 2.50 ppb |
| 2017-05-08 | 16173495 | 2.80 ppb |
| 2018-05-14 | 8054022-01 | 2.60 ppb |
| 2019-05-30 | 9055519-01 | 3.00 ppb |