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EWG's Tap Water Database — 2021 UPDATE

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Alachlor (Lasso)

Southwest Ouachita Waterworks Inc.

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

MORE ABOUT THIS CONTAMINANT

 

28

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND120ND
2015ND20ND
2016N/A00N/A
2017ND140ND
2018N/A00N/A
2019N/A00N/A

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
2014-06-16AD92414ND
2014-06-16AD92413ND
2014-06-16AD92414ND
2014-06-16AD92413ND
2014-10-20AD98782ND
2014-10-20AD98780ND
2014-10-20AD98781ND
2014-10-20AD98782ND
2014-10-20AD98783ND
2014-10-20AD98781ND
2014-10-20AD98780ND
2014-10-20AD98783ND
2015-01-05AE00867ND
2015-01-05AE00867ND
2017-06-1235318592003ND
2017-06-1235318592001ND
2017-06-1235318592001ND
2017-06-1235318592003ND
2017-07-2735326771008ND
2017-07-2735326771008ND
2017-10-1635343270001ND
2017-10-1635343270004ND
2017-10-1635343270003ND
2017-10-1635343270002ND
2017-10-1635343270001ND
2017-10-1635343270004ND
2017-10-1635343270003ND
2017-10-1635343270002ND