The Waste Management Division communicates with the United States Environmental Protection Agency (US EPA) Region IV in regard to the twelve US EPA-administered National Priorities List (i.e., Superfund) sites that are located in Hillsborough County. The agency maintains general information files about these Superfund sites. More detailed information about the assessment and remediation of these sites can be obtained from the US EPA’s Administrative Records which are located at local public information repositories and at the US EPA Region IV in Atlanta, Georgia.

The Waste Management Division has been involved in the initial investigation of some of the uncontrolled and/or abandoned waste sites that are listed by the US EPA on the CERCLIS or by the Florida Department of Environmental Protection (FDEP) on the Waste Cleanup Sites List. The agency maintains general and preliminary information files on some of the CERCLIS and Waste Cleanup sites that are located in Hillsborough County.

The Waste Management Division also maintains several hundred files on petroleum contaminated sites.