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EWG's Tap Water Database — 2021 UPDATE

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Alachlor (Lasso)

Montgomery Water Works

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

MORE ABOUT THIS CONTAMINANT

 

32

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
2015ND160ND
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019ND140ND

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
2014-03-191403-00380-1SND
2014-06-171406-00205-1SND
2015-03-30AL11728ND
2015-03-30AL11727ND
2015-03-30AL11734ND
2015-03-30AL11732ND
2015-03-30AL11730ND
2015-03-30AL11731ND
2015-03-30AL11733ND
2015-03-30AL11729ND
2015-09-01AL32944ND
2015-09-01AL32945ND
2015-09-01AL32943ND
2015-09-01AL32942ND
2015-09-01AL32940ND
2015-09-01AL32939ND
2015-09-01AL32938ND
2015-09-01AL32941ND
2019-03-19188801-01SOCND
2019-03-19188802-01SOCND
2019-03-19188800-01SOCND
2019-03-19188807-01SOCND
2019-03-19188805-01SOCND
2019-03-19188803-01SOCND
2019-03-19188806-01SOCND
2019-09-18195724-01SOCND
2019-09-18195723-01SOCND
2019-09-18195722-01SOCND
2019-09-18195728-01SOCND
2019-09-18195726-01SOCND
2019-09-18195725-01SOCND
2019-09-18195727-01SOCND