Permethrin
Harford County Department of Public Works
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.
10
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 | 1 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-03-12 | 2301973003 | ND |
| 2018-03-12 | 2301973002 | ND |
| 2018-03-12 | 2301973001 | ND |
| 2018-06-11 | 8060400-02A | ND |
| 2018-06-11 | 8060400-01A | ND |
| 2018-11-19 | 8111177-01B | ND |
| 2018-11-19 | 8111178-02B | ND |
| 2018-11-19 | 8111178-01B | ND |
| 2018-12-10 | 8120005-01B | ND |
| 2019-01-07 | 9011195-01B | ND |