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EWG's Tap Water Database — 2021 UPDATE

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Alachlor (Lasso)

Oro Valley Water Utility

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

MORE ABOUT THIS CONTAMINANT

 

61

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
2015N/A00N/A
2016ND320ND
2017N/A00N/A
2018N/A00N/A
2019ND290ND

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
2016-01-043381311ND
2016-01-053382051ND
2016-01-123385114ND
2016-01-133385896ND
2016-01-143386689ND
2016-01-143386649ND
2016-01-193388442ND
2016-01-193388436ND
2016-01-193388178ND
2016-01-203388830ND
2016-01-203388823ND
2016-01-213389523ND
2016-01-213389523ND
2016-01-253390662ND
2016-01-263391054ND
2016-02-013393607ND
2016-07-123491868ND
2016-07-133492982ND
2016-07-133492976ND
2016-07-143493985ND
2016-07-143493976ND
2016-07-143493970ND
2016-07-183496288ND
2016-07-183496282ND
2016-07-203499085ND
2016-07-213500429ND
2016-07-213500423ND
2016-07-213500417ND
2016-07-263504300ND
2016-07-263503664ND
2016-07-273505860ND
2016-08-083516115ND
2019-01-144173149ND
2019-01-144173143ND
2019-01-154174530ND
2019-01-154174524ND
2019-01-154174402ND
2019-01-154174396ND
2019-01-164176212ND
2019-01-164176206ND
2019-01-164176196ND
2019-01-164176190ND
2019-01-174177430ND
2019-01-174177424ND
2019-01-174177477ND
2019-01-174177483ND
2019-01-174177498ND
2019-07-014341805ND
2019-07-014341799ND
2019-07-014341793ND
2019-07-024343552ND
2019-07-024343546ND
2019-07-024343540ND
2019-07-084347963ND
2019-07-094347969ND
2019-07-104350884ND
2019-07-154356789ND
2019-07-164356782ND
2019-07-174358295ND
2019-07-184358302ND
2019-07-184358308ND