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EWG's Tap Water Database — 2021 UPDATE

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Alachlor (Lasso)

Natchitoches Water System

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

MORE ABOUT THIS CONTAMINANT

 

22

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
2014ND40ND
2015ND40ND
2016ND40ND
2017ND20ND
2018ND40ND
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
2014-04-14AD90602ND
2014-04-14AD90602ND
2014-09-15AD97162ND
2014-09-15AD97162ND
2015-03-0935178883003ND
2015-03-0935178883003ND
2015-10-1235211703003ND
2015-10-1235211703003ND
2016-04-1235239164010ND
2016-04-1235239164010ND
2016-11-2135279123004ND
2016-11-2135279123004ND
2017-04-1035306447004ND
2017-04-1035306447004ND
2018-01-2235370029001ND
2018-01-2235370029001ND
2018-07-3135408508001ND
2018-07-3135408508001ND
2019-02-2535450970001ND
2019-02-2535450970001ND
2019-08-0735490086001ND
2019-08-0735490086001ND