Discharge of industrial wastewater was inventoried for 68 systems in 1990 and totaled 285 million gallons per day. In 1990, there were 1.56 million septic tanks in Florida. The remaining 34 percent of the popu- lation (4.36 million) are served by the 2,700 smaller domestic wastewater systems or have individual septic tanks. Discharge of treated domestic wastewater from the 994 systems inventoried in Florida during 1990 totaled 1,353 million gallons per day and served an estimated 8.58 million people (66 percent of the population of Florida in 1990). An estimated 322 million gallons per day of the treated domestic and industrial wastewater was reused during 1990. Discharge to ground-water includes treated effluent outfalls to land application systems (reuse systems and spray fields), drain fields, percolation ponds (51 percent), and to injection wells (49 percent). Discharge to surface water includes effluent outfalls into the Atlantic Ocean (32 percent), while the re- maining (68 percent) is discharged into the Gulf of Mexico, bays, rivers, wetlands, and other surface water bodies throughout Florida. Approxi- mately 65 percent of this water was discharged to surface water during 1990 and the remaining 35 percent was discharged to ground water. Based on this inventory, the estimated discharge of treated wastewater in Florida during 1990 totaled 1,638 million gallons per day. The number of wastewater systems inventoried for 1990 was 1,062 (systems that treated and discharged more than 0.01 Mgal/d or had a plant capacity of greater than 0.04 Mgal/d. Of this total, 72 percent were domestic wastewater facilities and 28 percent were industrial waste- water facilities. Estimated discharge of treated wastewater in Florida, 1990Īccording to the Florida Department of Environ- mental Protection, 5,100 wastewater treatment systems were in operation during 1990.
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