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EWG's Tap Water Database — 2021 UPDATE

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Alachlor (Lasso)

Parker WSD

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

MORE ABOUT THIS CONTAMINANT

 

68

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
2015ND320ND
2016ND80ND
2017ND60ND
2018N/A00N/A
2019ND200ND

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 Result
2014-07-21ND
2014-07-24ND
2015-03-19ND
2015-03-26ND
2015-03-30ND
2015-04-15ND
2015-04-15ND
2015-04-27ND
2015-05-21ND
2015-05-21ND
2015-06-10ND
2015-06-10ND
2015-06-16ND
2015-06-17ND
2015-06-17ND
2015-06-24ND
2015-06-24ND
2015-07-29ND
2015-08-13ND
2015-08-13ND
2015-08-20ND
2015-08-20ND
2015-08-20ND
2015-08-26ND
2015-09-01ND
2015-09-01ND
2015-09-01ND
2015-09-03ND
2015-09-10ND
2015-09-15ND
2015-09-15ND
2015-09-15ND
2015-09-16ND
2015-10-21ND
2016-01-28ND
2016-05-03ND
2016-07-14ND
2016-07-18ND
2016-07-28ND
2016-10-04ND
2016-10-18ND
2016-10-18ND
2017-06-08ND
2017-07-18ND
2017-07-24ND
2017-07-26ND
2017-07-31ND
2017-10-23ND
2019-04-16ND
2019-04-16ND
2019-04-17ND
2019-04-23ND
2019-04-24ND
2019-04-25ND
2019-04-25ND
2019-05-22ND
2019-08-14ND
2019-08-26ND
2019-08-27ND
2019-08-29ND
2019-08-29ND
2019-09-05ND
2019-09-11ND
2019-09-23ND
2019-09-25ND
2019-10-02ND
2019-10-17ND
2019-10-17ND