Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Alachlor (Lasso)

San Diego County Water Authority

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

MORE ABOUT THIS CONTAMINANT

 

48

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND100ND
2015ND80ND
2016ND80ND
2017ND80ND
2018ND80ND
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
2014-02-059590-003-1055ND
2014-02-059590-003-1048ND
2014-04-099590-003-1345ND
2014-04-099590-003-1329ND
2014-07-249590-003-1220ND
2014-07-249590-003-1210ND
2014-12-169590-003-1136ND
2014-12-169590-003-1120ND
2014-12-299590-001-0955ND
2014-12-299590-001-0945ND
2015-01-059590-003-1020ND
2015-01-059590-003-0937ND
2015-04-089590-003-1410ND
2015-04-089590-003-1422ND
2015-08-259590-003-1306ND
2015-08-259590-003-1325ND
2015-10-209590-003-1143ND
2015-10-209590-003-1154ND
2016-02-109590-003-1309ND
2016-02-109590-003-1331ND
2016-06-169590-003-1430ND
2016-06-169590-003-1358ND
2016-08-029590-003-1058ND
2016-08-029590-003-1125ND
2016-11-299590-003-1242ND
2016-11-299590-003-1253ND
2017-03-149590-003-1412ND
2017-03-149590-003-1426ND
2017-06-149590-003-0906ND
2017-06-149590-003-0931ND
2017-07-059590-003-1106ND
2017-07-059590-003-1115ND
2017-10-169590-003-1257ND
2017-10-169590-003-1247ND
2018-01-039590-003-1157ND
2018-01-039590-003-1210ND
2018-04-109590-003-1221ND
2018-04-109590-003-1200ND
2018-09-179590-003-1155ND
2018-09-179590-003-1140ND
2018-10-019590-003-1317ND
2018-10-019590-003-1255ND
2019-06-139590-003-1029ND
2019-06-139590-003-0946ND
2019-09-179590-003-1155ND
2019-09-179590-003-1144ND
2019-12-119590-003-0745ND
2019-12-119590-003-0803ND