Permethrin
Enumclaw Water Department
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.
8
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 | 6 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2019-01-22 | 19-03078-6556 | ND |
| 2019-01-22 | 19-03078-6555 | ND |
| 2019-07-09 | 19-25925-50399 | ND |
| 2019-07-09 | 19-25925-50398 | ND |
| 2019-11-25 | 19-45205-87390 | ND |
| 2019-11-25 | 19-45205-87391 | ND |
| 2020-07-07 | 20-22959-43673 | ND |
| 2020-07-07 | 20-22959-43674 | ND |