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EWG's Tap Water Database — 2021 UPDATE

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Alachlor (Lasso)

Widefield WSD

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

 

35

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
2014ND30ND
2015ND40ND
2016ND110ND
2017ND20ND
2018ND50ND
2019ND100ND

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 Result
2014-02-12ND
2014-03-12ND
2014-03-19ND
2015-06-08ND
2015-06-09ND
2015-09-23ND
2015-09-29ND
2016-05-02ND
2016-05-02ND
2016-05-02ND
2016-05-02ND
2016-05-02ND
2016-06-15ND
2016-08-08ND
2016-08-08ND
2016-08-23ND
2016-08-23ND
2016-09-06ND
2017-01-18ND
2017-05-24ND
2018-08-21ND
2018-08-21ND
2018-08-21ND
2018-11-26ND
2018-11-27ND
2019-05-06ND
2019-05-28ND
2019-05-28ND
2019-07-17ND
2019-07-29ND
2019-07-29ND
2019-09-09ND
2019-09-11ND
2019-11-13ND
2019-12-03ND