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EWG's Tap Water Database — 2021 UPDATE

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Alachlor (Lasso)

Three Valleys Municipal Water District

Alachlor is a widely used agricultural herbicide. It causes cancer in laboratory animals and may be carcinogenic to people.

MORE ABOUT THIS CONTAMINANT

 

25

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015ND20ND
2016ND50ND
2017ND60ND
2018ND50ND
2019ND30ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 2 ppb

The legal limit for alachlor, established in 1991, was based on toxicity studies in laboratory animals conducted in the 1980s.

ppb = parts per billion

All test results

Date Lab ID Result
2014-05-133761-004-1000ND
2014-05-133761-002-1034ND
2014-06-103761-004-1030ND
2014-09-163761-004-1101ND
2015-03-103761-002-0930ND
2015-06-093761-004-0940ND
2016-03-153761-002-0900ND
2016-06-213761-002-1030ND
2016-06-213761-004-1006ND
2016-09-133761-002-1000ND
2016-12-133761-002-1020ND
2017-03-213761-004-1040ND
2017-05-163761-004-0900ND
2017-05-163761-002-0800ND
2017-06-213761-002-1000ND
2017-06-213761-004-1100ND
2017-09-123761-002-0900ND
2018-05-153761-004-0930ND
2018-05-153761-002-0950ND
2018-06-123761-004-0000ND
2018-09-113761-002-1045ND
2018-09-173761-002-0830ND
2019-05-213761-004-1050ND
2019-05-213761-002-1020ND
2019-09-173761-002-1005ND