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EWG's Tap Water Database — 2021 UPDATE

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Alachlor (Lasso)

Norwalk City

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

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND30ND
2015ND30ND
2016ND20ND
2017ND30ND
2018ND30ND
2019ND30ND

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
2014-04-14041514016ND
2014-05-14051514021ND
2014-06-23062414017ND
2015-04-08040915023ND
2015-05-13051415011ND
2015-06-10061115031ND
2016-04-06040716027ND
2016-06-01060216025ND
2017-04-10041117032ND
2017-05-15051617031ND
2017-06-20062117037ND
2018-04-2418-17652-02ND
2018-05-0118-17863-01ND
2018-06-0518-20675-01ND
2019-04-0219-16343-01ND
2019-05-0619-19010-01ND
2019-06-0419-21158-01ND