Permethrin
Harris County Water System
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 |
|---|---|---|---|---|
| 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 | N/A | 0 | 0 | N/A |
| 2019 | ND | 8 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2019-06-10 | 4320604 | ND |
| 2019-06-10 | 4320600 | ND |
| 2019-06-10 | 4320572 | ND |
| 2019-09-03 | 4407373 | ND |
| 2019-09-03 | 4407369 | ND |
| 2019-12-02 | 4501004 | ND |
| 2019-12-02 | 4501047 | ND |
| 2019-12-02 | 4501013 | ND |
| 2020-03-09 | 4582951 | ND |
| 2020-03-09 | 4582773 | ND |