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EWG's Tap Water Database — 2021 UPDATE

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Alachlor (Lasso)

City of San Luis

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
2014ND40ND
2015ND120ND
2016N/A00N/A
2017N/A00N/A
2018ND60ND
2019ND60ND

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
2014-02-13479281-005DND
2014-02-13479281-005CND
2014-02-13479281-005BND
2014-02-13479281-005AND
2015-05-20201505210175SND
2015-05-20201505210174SND
2015-05-20201505210173SND
2015-05-20201505210172SND
2015-05-20201505210171SND
2015-05-20201505210155SND
2015-11-18201511190113SND
2015-11-18201511190116SND
2015-11-18201511190115SND
2015-11-18201511190114SND
2015-11-18201511190112SND
2015-11-18201511190110SND
2018-03-27201803280599SND
2018-03-27201803280598SND
2018-03-27201803280597SND
2018-03-27201803280596SND
2018-03-27201803280589SND
2018-03-27201803280588SND
2019-03-12201903130086SND
2019-03-12201903130092SND
2019-03-12201903130091SND
2019-03-12201903130090SND
2019-03-12201903130089SND
2019-03-12201903130088SND