Permethrin
City of Westminster
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 |
|---|---|---|---|---|
| 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 | 9 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-04-24 | 3919886 | ND |
| 2018-04-24 | 3919785 | ND |
| 2018-04-24 | 3919969 | ND |
| 2018-07-11 | 3986271 | ND |
| 2018-07-11 | 3986278 | ND |
| 2018-07-11 | 3986381 | ND |
| 2018-10-09 | 4083402 | ND |
| 2018-10-09 | 4083986 | ND |
| 2018-10-09 | 4083408 | ND |
| 2019-01-23 | 4181929 | ND |
| 2019-01-23 | 4181904 | ND |
| 2019-01-23 | 4181536 | ND |