Permethrin
City of San Juan Capistrano
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.
12
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 | ND | 6 | 0 | ND |
| 2019 | ND | 6 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-07-05 | 201807050225 | ND |
| 2018-07-05 | 201807050227 | ND |
| 2018-07-05 | 201807050233 | ND |
| 2018-07-05 | 201807050234 | ND |
| 2018-10-17 | 201810170437 | ND |
| 2018-10-17 | 201810170438 | ND |
| 2019-01-08 | A9A0006-01 | ND |
| 2019-01-08 | A9A0006-02 | ND |
| 2019-01-08 | A9A1349-01 | ND |
| 2019-01-08 | A9A1349-02 | ND |
| 2019-04-30 | A9C1332-01 | ND |
| 2019-04-30 | A9C1332-02 | ND |