1,1,1-Trichloroethane
Lake Oswego Municipal Water
NOTE: Lake Oswego Municipal Water purchases water from Lake Oswego - Tigard Water Supply which is required to test for 1,1,1-trichloroethane. Sample information shown below was taken by Lake Oswego - Tigard Water Supply.
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 1 | 0 | ND |
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
NOTE: Lake Oswego Municipal Water purchases water from Lake Oswego - Tigard Water Supply which is required to test for 1,1,1-trichloroethane. Sample information shown below was taken by Lake Oswego - Tigard Water Supply.
| Date | Lab ID | Result |
|---|---|---|
| 2020-11-18 | 202011190312-V | ND |
| 2021-10-27 | 202110280645-V | ND |
| 2022-01-19 | 202201200821-V | ND |
| 2023-10-04 | 23-60551-V | ND |