Permethrin
Castle Rock
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.
11
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 | 4 | 0 | ND |
ppb = parts per billion
All test results
Date | Result |
---|---|
2019-10-28 | ND |
2019-10-28 | ND |
2019-11-19 | ND |
2019-12-09 | ND |
2020-01-16 | ND |
2020-03-18 | ND |
2020-03-18 | ND |
2020-03-18 | ND |
2020-04-15 | ND |
2020-05-13 | ND |
2020-06-17 | ND |