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EWG's Tap Water Database — 2021 UPDATE

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Methomyl

City of Napa

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.

 

27

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
2014ND60ND
2015ND30ND
2016ND40ND
2017ND60ND
2018ND40ND
2019ND40ND

ppb = parts per billion

All test results

Date Lab ID Result
2014-07-099590-007-0925ND
2014-07-093334-007-0925ND
2014-07-099590-006-1245ND
2014-07-093334-006-1245ND
2014-07-099590-005-1145ND
2014-07-093334-005-1145ND
2015-07-219590-007-0940ND
2015-07-219590-005-1120ND
2015-07-219590-006-1415ND
2016-07-279590-006-1245ND
2016-07-273334-007-1245ND
2016-07-273334-006-1545ND
2016-07-279590-006-1545ND
2017-07-203334-006-1330ND
2017-07-203334-007-1050ND
2017-07-209590-007-1050ND
2017-07-209590-006-1330ND
2017-09-133334-005-0840ND
2017-09-139590-005-0840ND
2018-07-113334-007-1200ND
2018-07-119590-007-1200ND
2018-07-119590-006-1015ND
2018-07-113334-006-1015ND
2019-07-101644-007-1200ND
2019-07-103334-007-0830ND
2019-07-103334-006-1200ND
2019-09-041644-006-1050ND