Know Your Environment. Protect Your Health.

Permethrin

King County Water District 111

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

 
YearAverage resultSamples takenDetectionsRange of results
2018ND50ND
2019ND60ND
2020N/A00N/A
2021N/A00N/A
2022N/A00N/A
2023N/A00N/A

ppb = parts per billion

All test results

Date Lab ID Result
2018-07-18201807190781ND
2018-07-23201807240329ND
2018-09-10201809110515ND
2018-09-10201809110516ND
2018-10-08201810090300ND
2019-01-14201901150181ND
2019-01-14201901150235ND
2019-01-14201901150238ND
2019-03-07201903080155ND
2019-03-07201903080148ND
2019-04-10201904110271ND