EPA is releasing assessment for public comment on the potential for human health risk of the pesticide chlorpyrifos. Assessment shows some risks to workers who mix, load, and apply chlorpyrifos pesticide products. When used in large amounts, chlorpyrifos has potential to pose risks in limited geographic areas when drinking water from small watersheds. There were no additional risks from pesticide exposures in food or exposures to bystanders and workers from airborne chlorpyrifos.