Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Alachlor (Lasso)

City of Westminster

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

MORE ABOUT THIS CONTAMINANT

 

31

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
2014ND70ND
2015ND50ND
2016ND60ND
2017ND60ND
2018ND50ND
2019ND20ND

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
2014-06-090060015_01_94579ND
2014-07-140060015_01_00014ND
2014-07-140060015_05_00014ND
2014-07-140060015_06_00014ND
2014-07-140060015_07_00014ND
2014-07-140060015_08_00014ND
2014-09-230060015_01_96356ND
2015-06-18101421ND
2015-08-26E16000776001ND
2015-08-260324AU2615ND
2015-09-11103073ND
2015-09-11103073BND
2016-05-23E16004418002ND
2016-06-15107975ND
2016-09-08E17001059013ND
2016-09-08E17001059005ND
2016-09-08E17001059002ND
2016-09-26110304ND
2017-01-31E17002940005ND
2017-01-31E17002940007ND
2017-01-31E17002940009ND
2017-05-31E17004691001ND
2017-06-22115325ND
2017-09-19117175ND
2018-02-27120150ND
2018-05-14E18004109001ND
2018-06-14122570ND
2018-09-11124887ND
2018-09-11E19000887001ND
2019-06-12130684ND
2019-09-17132881ND