Permethrin
City of Tacoma
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 |
|---|---|---|---|---|
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 6 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | N/A | 0 | 0 | N/A |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2019-06-17 | 201906180320 | ND |
| 2019-06-18 | 201906200113 | ND |
| 2019-07-08 | 201907090493 | ND |
| 2019-10-14 | 201910150295 | ND |
| 2019-11-18 | 201911190327 | ND |
| 2019-11-19 | 201911200332 | ND |
| 2020-01-06 | 202001070137 | ND |
| 2020-04-06 | 202004070215 | ND |
| 2020-07-07 | 202007080257 | ND |
| 2020-12-07 | 202012080075 | ND |