After much public debate and education regarding the health and cost aspects of a dual water system, such a system is now operating in Cape Coral, Florida. The authors conceived a plan for a dual water reclamation system for the city in 1981 during a drought in south Florida. They studied the city's 300-mi (480-km) freshwater canal system to determine how much water would be available for a citywide irrigation system that would be supplemented by reuse of wastewater. Test wells were drilled over the 114-sq mi (295-km2) area of Cape Coral to assess the limited supply of treatable potable water for use in all aquifers. In 1992, the first home was connected to the new irrigation supply. About 25 percent of the city is now connected. Cape Coral is the only Florida city that has a detailed utility master plan that includes a citywide nonpotable irrigation system. Includes 5 references, table, figures.