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EWG's Tap Water Database — 2021 UPDATE

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Alachlor (Lasso)

Liberty Water Rio Rico

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
2014N/A00N/A
2015ND10ND
2016ND120ND
2017N/A00N/A
2018ND30ND
2019ND120ND

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
2015-11-193362833ND
2016-05-183453953ND
2016-05-183453947ND
2016-05-183453941ND
2016-05-183453935ND
2016-06-273479517ND
2016-06-273479511ND
2016-08-233530542ND
2016-08-233530536ND
2016-08-233530530ND
2016-08-233530524ND
2016-08-233530518ND
2016-08-233530512ND
2018-05-153939427ND
2018-05-153939426ND
2018-05-153939425ND
2019-04-094257188ND
2019-04-094257182ND
2019-04-094257176ND
2019-04-094257170ND
2019-04-094257158ND
2019-05-014281333ND
2019-08-124386017ND
2019-08-124386061ND
2019-08-124386055ND
2019-08-124386049ND
2019-08-124386029ND
2019-08-124386023ND