Permethrin
City of Patterson
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.
14
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 | 7 | 0 | ND |
| 2019 | ND | 7 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-10-10 | 1810566-001B | ND |
| 2018-10-10 | 1810566-002B | ND |
| 2018-10-10 | 1810566-003B | ND |
| 2018-10-10 | 1810566-004B | ND |
| 2018-10-10 | 1810566-005B | ND |
| 2018-10-10 | 1810566-006B | ND |
| 2018-10-10 | 1810566-007B | ND |
| 2019-04-03 | 1904234-001B | ND |
| 2019-04-03 | 1904234-002B | ND |
| 2019-04-03 | 1904234-003B | ND |
| 2019-04-03 | 1904234-004B | ND |
| 2019-04-03 | 1904234-005B | ND |
| 2019-04-03 | 1904234-006B | ND |
| 2019-04-03 | 1904234-007B | ND |