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EWG's Tap Water Database — 2021 UPDATE

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Permethrin

Nob Hill Water Association

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.

 

9

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019ND90ND

ppb = parts per billion

All test results

Date Lab ID Result
2019-04-2919-14919-30087ND
2019-04-2919-14919-30088ND
2019-04-2919-14919-30089ND
2019-04-2919-14919-30090ND
2019-05-2819-19340-38060ND
2019-10-0119-37906-73630ND
2019-10-0119-37906-73631ND
2019-10-0119-37906-73632ND
2019-11-2519-45201-87382ND