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EWG's Tap Water Database — 2021 UPDATE

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Alachlor (Lasso)

Public Wholesale WSD 5

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

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND20ND
20150.0580 ppb51ND - 0.290 ppb
2016ND40ND
2017ND10ND
2018ND10ND
2019ND10ND

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
2014-06-02123229ND
2014-10-06210120ND
2015-01-05258119ND
2015-04-063093670.290 ppb
2015-05-25337636ND
2015-07-06362023ND
2015-10-05417399ND
2016-01-04469359ND
2016-04-11526515ND
2016-05-16547604ND
2016-07-11580907ND
2017-06-05771394ND
2018-05-15970833ND
2019-05-131157825ND