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EWG's Tap Water Database — 2021 UPDATE

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Permethrin

San Jose Water Company

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.

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44

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019ND440ND

ppb = parts per billion

All test results

Date Lab ID Result
2019-01-14201901170108ND
2019-01-15201901170109ND
2019-01-15201901170106ND
2019-01-15201901170110ND
2019-01-15201901170111ND
2019-01-22201901260218ND
2019-01-28201902020130ND
2019-01-28201902020132ND
2019-02-20201902260118ND
2019-02-21201902260117ND
2019-02-25201902270379ND
2019-03-05201903080087ND
2019-03-05201903080084ND
2019-03-05201903080091ND
2019-03-05201903080076ND
2019-03-05201903080093ND
2019-03-13201903190101ND
2019-04-02201904050062ND
2019-04-02201904050063ND
2019-04-03201904050066ND
2019-04-03201904050065ND
2019-04-03201904050064ND
2019-07-08201907120344ND
2019-07-09201907120345ND
2019-07-10201907120386ND
2019-07-10201907120387ND
2019-07-10201907120385ND
2019-07-10201907120388ND
2019-07-10201907120384ND
2019-07-22201907260193ND
2019-07-22201907260191ND
2019-07-23201907230425ND
2019-07-23201907230431ND
2019-07-23201907230427ND
2019-07-23201907230430ND
2019-07-23201907230428ND
2019-07-23201907230429ND
2019-07-23201907230426ND
2019-07-24201907260190ND
2019-07-24201907260192ND
2019-10-23201910250300ND
2019-10-23201910250298ND
2019-10-23201910250294ND
2019-10-23201910250299ND