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EWG's Tap Water Database — 2021 UPDATE

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Alachlor (Lasso)

Clwsc Canyon Lake Shores

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

MORE ABOUT THIS CONTAMINANT

 

44

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND70ND
2015ND70ND
2016ND80ND
2017ND40ND
2018ND100ND
2019ND80ND

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
2014-02-18AC43387ND
2014-02-18AC43391ND
2014-04-30AC52469ND
2014-04-30AC52465ND
2014-04-30AC52468ND
2014-10-08AC69252ND
2014-10-08AC69251ND
2015-02-03AC79093ND
2015-02-03AC79094ND
2015-03-26AC86424ND
2015-05-13AC91908ND
2015-08-12AD03948ND
2015-08-12AD03946ND
2015-09-25AD08859ND
2016-02-03AD21958ND
2016-02-03AD21959ND
2016-02-03AD21961ND
2016-03-09AD28050ND
2016-03-09AD28038ND
2016-04-27AD34523ND
2016-04-27AD34521ND
2016-07-26AD45807ND
2017-01-25AD66937ND
2017-01-25AD66936ND
2017-01-25AD66938ND
2017-10-05AD99652ND
2018-02-07AE12864ND
2018-05-16AE26641ND
2018-05-16AE26642ND
2018-05-17AE26865ND
2018-05-17AE26866ND
2018-05-17AE26864ND
2018-05-17AE26868ND
2018-05-17AE26867ND
2018-07-26AE34740ND
2018-11-06AE45478ND
2019-02-06AE53299ND
2019-02-06AE53298ND
2019-02-06AE53297ND
2019-04-23AE63418ND
2019-10-29AE87872ND
2019-10-30AE88037ND
2019-10-30AE88039ND
2019-10-30AE88038ND