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EWG's Tap Water Database — 2021 UPDATE

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Alachlor (Lasso)

Guymon

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
2014N/A00N/A
2015ND10ND
2016N/A00N/A
2017N/A00N/A
2018ND240ND
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
2015-09-15546421ND
2018-02-20AB22005-06ND
2018-02-20AB22005-05ND
2018-02-20AB22005-04ND
2018-02-20AB22005-03ND
2018-02-20AB22005-02ND
2018-02-20AB22005-01ND
2018-04-24AD25021-06RE1ND
2018-04-24AD25021-05RE1ND
2018-04-24AD25021-04RE1ND
2018-04-24AD25021-03RE1ND
2018-04-24AD25021-02RE1ND
2018-04-24AD25021-01ND
2018-09-18AI19044-04ND
2018-09-18AI19044-06ND
2018-09-18AI19044-05ND
2018-09-18AI19044-03ND
2018-09-18AI19044-02ND
2018-09-18AI19044-01ND
2018-10-16AJ17017-06ND
2018-10-16AJ17017-05ND
2018-10-16AJ17017-04ND
2018-10-16AJ17017-03ND
2018-10-16AJ17017-02ND
2018-10-16AJ17017-01ND
2019-08-19BH21004-01ND
2019-08-19BH21004-06ND
2019-08-19BH21004-05ND
2019-08-19BH21004-04ND
2019-08-19BH21004-03ND
2019-08-19BH21004-02ND