The compound is slightly toxic to practically non-toxic to wildfowl. Alachlor should not pose a problem for bees when used as directed. Less than one percent of all of the wells had detectable levels of alachlor. Concentrations of the pesticide in the one percent of the wells where the compound was detected ranged from 0.1 ppb to 1.0 ppb. No parent compound was found after three weeks when alachlor was applied to plants.
Higher concentrations appear in the vegetative parts than in the reproductive parts of the plant.
The Royal Society of Chemistry, Cambridge, England. Handbook of Acute Toxicity of Chemicals to Fish and Aquatic Invertebrates. U. S. Dept of the Interior, Fish and Wildlife Service, Resource Publication 137. Handbook of Toxicity of Pesticides to Wildlife. U. S. Dept of the Interior, Fish and Wildlife Service, Resource Publication 153.