Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Methomyl

California Water Service - South San Francisco

Methomyl is an extremely toxic carbamate insecticide that targets the nervous system. In 2015 the EPA restricted some uses of methomyl on some food crops to reduce risks to human health.

 

13

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
2014ND80ND
2015ND20ND
2016ND10ND
2017ND20ND
2018N/A00N/A
2019N/A00N/A

ppb = parts per billion

All test results

Date Lab ID Result
2014-05-215810-013-1050ND
2014-06-175810-007-1407ND
2014-06-175810-008-1341ND
2014-08-215810-013-1030ND
2014-11-205810-003-1038ND
2014-12-045810-007-1040ND
2014-12-085810-003-1028ND
2014-12-085810-008-0911ND
2015-02-115810-014-1100ND
2015-05-275810-014-1353ND
2016-02-089590-006-1030ND
2017-11-289590-008-1500ND
2017-11-289590-013-1500ND