According to the National Library of Medicine, there is evidence some pesticides pose possible risks to humans and other life forms. Pesticides can potentially contaminate water, soil, turf, vegetation and harm organisms such as birds, fish, beneficial insects and non-targeted plants. The Oregon Department of Agriculture enforces rules and regulations regarding pesticide use in the state and encourages eco-conscious efforts to exercise pest control. When chatting with your pest control service, speak about their usage of pesticides. You may even want to make a list of what they use and research on your own.