In certain locations of Florida, leaking underground storage tanks, industrial operations and spills, and over-use of pesticides (such as ethylene dibromide, [EDB]) have caused organic chemical compounds and toxic metals such as cadmium and chromium to leach into groundwater.

These areas are identified by the Florida Department of Environmental Protection (DEP).

The contaminants in these areas present a variety of health risks. DEP is responsible for mandating cleanup actions and advising residents in contaminated areas when additional testing of their water is needed and if other precautions or remediations are required.