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An average of 21,206 million gallons per day of water were withdrawn for use in Florida in 1980 a 6 percent increase since 1975 and a 38 percent increase of 5,893 million gallons per day since 1970. The 1980 daily total consisted of 7,309 million gallons of freshwater and 13,897 million gallons of saline water. The freshwater supply was almost equally divided between ground water (51 percent) and surface water (49 percent). Almost all the saline water was pumped from estuaries. Of the saline water, only 121 million gallons per day less than 1 percent was obtained from wells. The largest use of freshwater in Florida was for irrigation an average of 2,997 million gallons per day, about 5 percent more than in 1975. Other freshwater uses in 1980 were: 1,859 million gallons per day for thermoelectric power generation, (an increase of 9 percent since 1975); 1,361 million gallons per day for public supply, (an increase of 19 percent since 1975); 781 million gallons per day for industrial use other than thermoelectric power generation (a decrease of 17 percent since 1975); and 310 million gallons per day for rural self-supplied use (an increase of 17 percent since 1975). The peak month of freshwater use was May with 9,300 million gallons per day; September was the minimum month with 5,930 million gallons per day of freshwater use. Of the 13,897 million gallons per day of saline water used in 1980, nearly all was for thermoelectric power generation (an increase of 21 percent since 1975). Only 57.5 million gallons per day of saline water were used for all other industrial purposes. Industry was the only category that had a decline in water use, a decrease of 157 million gallons per day from 1975, or 17 percent, primarily because of recycling of water. The average per capita use of freshwater for all uses has shown a steady decline from 1,180 gallons per day in 1965 to 750 gallons per day in 1980. This is because population has increased at a greater rate than the demand for freshwater. Population increased about 68 percent in the past 15 years but the use of freshwater increased only about 7 percent. A decline in use of freshwater by industry has resulted because of recycling and the emphasis on the use of saline water for thermoelectric power generation. However, the per capita use of freshwater for public supplies and rural domestic use has shown a steady increase over the years since 1950, leveling off at about 170 gallons per day since 1975. Irrigation, the largest use of freshwater, is also responsible for the greatest consumptive use, 1,530 million gallons per day, which includes an estimated 18 million gallons per day from conveyance loss, or about 39 percent of the water pumped. The next largest use of freshwater, thermoelectric power production, had the smallest consumptive use, about 1.7 percent of use, or 32.8 million gallons per day.

Source, use, and disposition of water in Florida, 1980