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EWG's Tap Water Database — 2021 UPDATE

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Alachlor (Lasso)

City of Frederick

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

MORE ABOUT THIS CONTAMINANT

 

40

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND80ND
2015ND80ND
2016ND80ND
2017ND80ND
2018ND50ND
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
2014-05-010100015_01_00486ND
2014-05-010100015_02_00486ND
2014-06-030100015_03_20108ND
2014-06-040100015_01_20108ND
2014-06-040100015_02_20108ND
2014-06-230100015_03_00553ND
2014-07-020100015_01_20159ND
2014-07-020100015_02_20159ND
2015-04-08E15003181001ND
2015-04-08E15003181005ND
2015-04-08E15003181003ND
2015-06-152077161002ND
2015-06-152077161003BND
2015-06-152077161001ND
2015-07-082081983002ND
2015-07-082081983001ND
2016-04-25E16003991005ND
2016-04-25E16003984002ND
2016-04-25E16003991002ND
2016-06-152152179003ND
2016-06-152152179002ND
2016-06-152152179001ND
2016-07-052156259001ND
2016-07-052156259002ND
2017-04-04E17003895003ND
2017-04-04E17003895001ND
2017-04-05E17003936001ND
2017-06-082237352002ND
2017-06-082237352001ND
2017-06-082237352003ND
2017-07-06224521001ND
2017-07-06224521002ND
2018-05-09E18004037001ND
2018-05-09E18004056001ND
2018-06-192322231001ND
2018-06-192322231002ND
2018-07-312330310001ND
2019-06-133040043001ND
2019-06-133040043002ND
2019-07-013043129001ND