Permethrin
Lake Oswego Municipal Water
NOTE: Lake Oswego Municipal Water purchases water from Lake Oswego - Tigard Water Supply which is required to test for permethrin. Sample information shown below was taken by Lake Oswego - Tigard Water Supply.
Permethrin is an insecticide used on agricultural crops, but most uses are non-agricultural. It can be applied to residential areas to control mosquitoes and ticks and also used as a bug repellent on clothing, as well as medical applications to treat head lice. Long-term exposure to permethrin may harm the liver.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 3 | 0 | ND |
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 permethrin. Sample information shown below was taken by Lake Oswego - Tigard Water Supply.
| Date | Lab ID | Result |
|---|