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EWG's Tap Water Database — 2021 UPDATE

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Alachlor (Lasso)

City of Mesa

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

MORE ABOUT THIS CONTAMINANT

 

63

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
2014ND20ND
2015ND290ND
2016ND20ND
2017N/A00N/A
2018ND260ND
2019ND40ND

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
2014-02-12201402120615SND
2014-04-14201404140044SND
2015-02-04201502050428SND
2015-02-04201502050419SND
2015-02-09201502090116SND
2015-02-09201502090114SND
2015-02-09201502090089SND
2015-02-11201502120371SND
2015-04-01201504010555SND
2015-04-07201504080340SND
2015-04-07201504080338SND
2015-04-07201504070448SND
2015-04-14201504150242SND
2015-04-14201504150237SND
2015-04-21201504220401SND
2015-04-21201504220403SND
2015-04-29201504290425SND
2015-07-07201507070354SND
2015-07-07201507070352SND
2015-07-14201507150044SND
2015-07-21201507210315SND
2015-07-21201507210313SND
2015-10-06201510060340SND
2015-10-06201510060339SND
2015-10-062015100060338SND
2015-10-12201510130289SND
2015-10-12201510130288SND
2015-10-14201510150131SND
2015-10-19201510200133SND
2015-10-21201510220130SND
2015-10-21201510220131SND
2016-06-08201606090223SND
2016-10-17201610180304SND
2018-02-08201802080669SND
2018-04-02201804030503SND
2018-04-03201804040820SND
2018-04-03201804040819SND
2018-04-03201804040818SND
2018-04-09201804100269SND
2018-04-10201804111115SND
2018-04-16201804170332SND
2018-04-16201804170331SND
2018-04-17201804180563SND
2018-04-17201804180562SND
2018-04-24201804250768SND
2018-04-24201804250767SND
2018-06-20201806200513SND
2018-08-07201808070334SND
2018-10-11201810110593SND
2018-10-11201810110592SND
2018-10-11201810110591SND
2018-10-16201810170428SND
2018-10-17201810170435SND
2018-10-18201810180392SND
2018-10-18201810180391SND
2018-10-22201810220265SND
2018-10-23201810230482SND
2018-10-24201810240339SND
2018-10-29201810290232SND
2019-02-0519020066ND
2019-03-1419030420ND
2019-03-1819030465ND
2019-08-2019080335ND