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EWG's Tap Water Database — 2021 UPDATE

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Alachlor (Lasso)

Aqua Pennsylvania Main System

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
2013N/A00N/A
2014ND140ND
2015N/A00N/A
2016ND10ND
2017ND130ND
2018N/A00N/A
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
2014-04-232003542001ND
2014-04-232003541001ND
2014-04-232003543001ND
2014-04-282004650001ND
2014-04-292004651001ND
2014-04-292004652001ND
2014-07-212019295001ND
2014-07-212019297001ND
2014-07-222019998001ND
2014-07-232019999001ND
2014-07-232020000001ND
2014-07-242020242001ND
2014-07-242020244001ND
2014-11-262042265001ND
2016-08-1114739484ND
2017-05-1716098355ND
2017-05-1716098327ND
2017-05-1716098383ND
2017-05-2516099716ND
2017-06-1416261726ND
2017-06-1416261708ND
2017-06-1416261717ND
2017-08-1416569932ND
2017-08-1416569876ND
2017-08-1516569904ND
2017-08-1616571229ND
2017-08-1616571200ND
2017-08-1616571258ND