Residential misting systems that automatically release sprays of toxic insecticide, typically permethrin, pyrethrins, and piperonyl butoxide, are not regulated or approved by the EPA. State and local regulation of these systems vary. As with other sprayed pesticide treatments for mosquitoes, including DIY and professional application, the pesticides are non-selective and can harm pollinators and other beneficial species of plants and animals. Effectiveness of these systems is difficult to verify (and easy for manufacturers to exaggerate).