Know Your Environment. Protect Your Health.

Alachlor (Lasso)

City of Tigard

NOTE: City of Tigard purchases water from Lake Oswego - Tigard Water Supply which is required to test for alachlor (lasso). Sample information shown below was taken by Lake Oswego - Tigard Water Supply.

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

 

3

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019N/A00N/A
2020ND50ND
2021ND20ND
2022ND10ND
2023ND10ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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

NOTE: City of Tigard purchases water from Lake Oswego - Tigard Water Supply which is required to test for alachlor (lasso). Sample information shown below was taken by Lake Oswego - Tigard Water Supply.

Date Lab ID Result
2021-10-27202110280645-SND
2022-01-19202201200820-SND
2023-10-0423-60552-SND