1,1,1-Trichloroethane
Nikishka Bay
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.
7
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 | 1.50 ppb | 1 | 1 | 1.50 ppb |
| 2019 | 1.30 ppb | 1 | 1 | 1.30 ppb |
| 2020 | 1.30 ppb | 1 | 1 | 1.30 ppb |
| 2021 | 1.15 ppb | 2 | 2 | 1.10 ppb - 1.20 ppb |
| 2022 | 1.10 ppb | 1 | 1 | 1.10 ppb |
| 2023 | 0.980 ppb | 1 | 1 | 0.980 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 |
|---|---|---|
| 2018-10-10 | VO*4089843 | 1.50 ppb |
| 2019-04-03 | 440-238643-1 | 1.30 ppb |
| 2020-03-17 | 4592453 | 1.30 ppb |
| 2021-07-13 | 4960616 | 1.10 ppb |
| 2021-12-20 | 810-10877-2 | 1.20 ppb |
| 2022-05-11 | 810-24848-2 | 1.10 ppb |
| 2023-04-26 | 810-61640-1 | 0.980 ppb |