Alachlor (Lasso)

Rapid City

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

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Year	Average result	Samples taken	Range of results
2013	N/A	0	N/A
2014	N/A	0	N/A
2015	N/A	0	N/A
2016	ND	1	ND
2017	N/A	0	N/A
2018	ND	18	ND
2019	N/A	0	N/A

ppb = parts per billion

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