Permethrin
City of Napa
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 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 | ND | 6 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-05-02 | 201805080916 | ND |
| 2018-05-16 | 201805180364 | ND |
| 2018-08-22 | 201808230533 | ND |
| 2018-08-22 | 201808230531 | ND |
| 2018-11-07 | 201811080887 | ND |
| 2018-11-07 | 201811080888 | ND |
| 2019-02-06 | 201804240501 | ND |
| 2019-02-06 | 201804240502 | ND |