Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Alachlor (Lasso)

Rancho California Water District

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

MORE ABOUT THIS CONTAMINANT

 

69

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND100ND
2015ND110ND
2016ND100ND
2017ND130ND
2018ND160ND
2019ND90ND

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
2014-02-074790-143-0924ND
2014-05-084790-143-1015ND
2014-08-064790-143-0905ND
2014-08-074790-048-1130ND
2014-09-034790-038-1235ND
2014-09-034790-012-0852ND
2014-09-044790-059-0935ND
2014-09-044790-024-0855ND
2014-10-024790-034-1015ND
2014-12-114790-024-0820ND
2015-01-294790-142-1030ND
2015-02-104790-143-0905ND
2015-04-224790-142-1015ND
2015-04-224790-053-1200ND
2015-05-144790-143-1505ND
2015-05-144790-095-1505ND
2015-07-144790-142-1020ND
2015-08-054790-143-1455ND
2015-10-144790-142-1045ND
2015-10-224790-044-0830ND
2015-11-304790-143-1325ND
2016-01-204790-142-1030ND
2016-02-294790-150-1830ND
2016-03-024790-071-1035ND
2016-04-144790-142-1100ND
2016-06-094790-018-1020ND
2016-07-204790-017-0900ND
2016-08-094790-142-1245ND
2016-10-114790-015-0935ND
2016-10-114790-051-1030ND
2016-11-295810-153-1055ND
2017-01-175810-037-0920ND
2017-02-039588-153-1050ND
2017-03-234790-142-1020ND
2017-04-124790-142-1030ND
2017-05-044790-153-1010ND
2017-07-064790-034-1012ND
2017-07-134790-142-1035ND
2017-08-104790-153-1215ND
2017-09-014790-150-0925ND
2017-09-284790-059-0943ND
2017-11-084790-150-1445ND
2017-11-224790-151-1100ND
2017-11-294790-012-0935ND
2018-02-079588-151-1127ND
2018-02-079588-150-1251ND
2018-04-274790-053-1156ND
2018-05-034790-151-1235ND
2018-05-034790-150-1130ND
2018-05-084790-015-1006ND
2018-05-224790-152-1051ND
2018-07-174790-152-1045ND
2018-08-094790-151-1000ND
2018-08-144790-150-0914ND
2018-08-224790-151-1007ND
2018-10-034790-152-1030ND
2018-10-174790-155-1240ND
2018-11-274790-151-1222ND
2018-11-274790-143-1005ND
2018-11-274790-150-1113ND
2019-01-094790-155-0930ND
2019-01-094790-152-1100ND
2019-02-194790-150-1022ND
2019-02-194790-151-0900ND
2019-03-124790-071-1030ND
2019-04-024790-155-1115ND
2019-06-044790-018-1030ND
2019-07-254790-155-0945ND
2019-10-089588-051-1045ND