Permethrin
City of Tumwater
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.
10
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 | 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 | 10 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2019-04-24 | 19-14527-29380 | ND |
| 2019-04-24 | 19-14638-29592 | ND |
| 2019-04-24 | 19-14527-29368 | ND |
| 2019-04-24 | 19-14527-29371 | ND |
| 2019-04-24 | 19-14527-29382 | ND |
| 2019-09-26 | 19-37134-72117 | ND |
| 2019-09-26 | 19-37134-72118 | ND |
| 2019-09-26 | 19-37134-72119 | ND |
| 2019-11-05 | 19-37134-72116A | ND |
| 2019-12-05 | 19-46395-89796 | ND |