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EWG's Tap Water Database — 2021 UPDATE

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Alachlor (Lasso)

Cottonwood Municipal Water Cw1

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

MORE ABOUT THIS CONTAMINANT

 

24

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
2014ND20ND
2015ND80ND
2016ND20ND
2017ND40ND
2018ND80ND
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
2014-12-08201412090195SND
2014-12-08201412090194SND
2015-02-24201502240224SND
2015-02-24201502240223SND
2015-06-03201506040075SND
2015-06-03201506040074SND
2015-06-03201506040073SND
2015-08-26201508270021SND
2015-08-26201508270020SND
2015-08-26201508270019SND
2016-04-06201604070132SND
2016-09-21201609220072SND
2017-03-14201703150222SND
2017-05-23201705240226SND
2017-08-08201708090339SND
2017-11-20201711210054SND
2018-05-16201805170468SND
2018-05-16201805170467SND
2018-05-16201805170466SND
2018-05-16201805170465SND
2018-10-25201810260033SND
2018-10-25201810260036SND
2018-10-25201810260035SND
2018-10-25201810260034SND