Permethrin

Yarmouth Water Department

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.

MORE ABOUT THIS CONTAMINANT

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2014	N/A	0	N/A
2015	N/A	0	N/A
2016	N/A	0	N/A
2017	N/A	0	N/A
2018	N/A	0	N/A
2019	ND	16	ND

ppb = parts per billion

All test results

Date	Result
2019-07-25	ND
2019-07-25	ND
2019-07-29	ND
2019-07-29	ND
2019-07-29	ND
2019-07-29	ND
2019-07-29	ND
2019-07-29	ND
2019-07-29	ND
2019-07-31	ND
2019-07-31	ND
2019-07-31	ND
2019-07-31	ND
2019-07-31	ND
2019-07-31	ND
2019-08-21	ND
2020-01-15	ND
2020-01-15	ND
2020-01-15	ND
2020-01-15	ND
2020-01-15	ND
2020-01-16	ND
2020-01-16	ND
2020-01-16	ND
2020-01-16	ND
2020-01-16	ND
2020-01-16	ND
2020-01-22	ND
2020-01-22	ND
2020-01-22	ND