About Us

The Southwest Ohio Air Quality Agency (Agency) monitors air quality and regulates industrial air emissions for Butler, Clermont, Clinton, Hamilton, and Warren counties. The Agency is a division of the Hamilton County Department of Environmental Services (Department) whose mission is to protect, preserve and enhance the environmental quality of our community.


A look at the origins and development of the Southwest Ohio Air Quality Agency.


Southwest Ohio Air Quality Agency email contact form.


Search our staff directory to find your contact.