FLORIDA GEOLOGICAL SURVEY


farms have produced excellent truck crops by using ground water for
sprinkler irrigation.,
 The amount of ground water available far exceeds the quantity
needed for irrigation, especially in the northern half of the counties. In
some places, part of the water used for irrigation percolates downward
to recharge the sand-and-gravel aquifer near where it was pumped.
 Santa Rosa and Escambia counties have about 30,000 cattle, horses,
and mules. Assuming a use of 12 gallons of water per animal per day, the
daily use of water would be 360,000 gpd. The swine population of both
counties is about 20.000. A use of 4 gallons of water per animal per day
gives 80,000 gpd. The estimated daily use of water for the 110,000
poultry flock is 15,000 gpd. The daily use of water in Escambia and
Santa Rosa counties for livestock is about 0.5 mgd.
 Supplies for domestic use.-A sufficient quantity of ground water for
domestic use can he obtained by wells almost any place in Escambia
and Santa Rosa counties. Wells in the area are usually less than 150 feet
deep, and many of them are less than 100 feet deep. The wells are
screened in the permeable sand or gravel. The permeable zones, in
which the screens are set, are located by inspection of the drill cuttings
while the well is being drilled.
 The estimated number of persons using ground water from private
wells for domestic purposes is 60,000 in Escambia County and 20,000 in
Santa Rosa County. Assuming an average use of 150 gallons of water
per person per day for domestic purposes, they would use water at a rate
of 9 mgd in Escambia County and 3 mgd in Santa Rosa County. The
amount used is only a small part of the total amount available. As each
well withdraws only a small amount of water, and because the wells are
widely spaced, the effect of this pumping on the water table is slight.

 FLORIDAN AQUIFER
 The quantity of water withdrawn from the Floridan aquifer by
 wells in Escambia and Santa Rosa counties is very small. Only about 8
 wells obtain water from this aquifer in both counties. The use of water
 from this aquifer is small because sufficient quantities can be obtained,
 generally, from the overlying sand-and-gravel aquifer, because the wa-
 ter is usually higher in mineral content than water from the sand-and-
 gravel aquifer, and because deep wells are expensive.
 The upper limestone of the Floridan aquifer in the southeastern cor-
 ner of Santa Rosa County is important. This aquifer provides the only
 major source of fresh ground water at Navarre Beach on Santa Rosa Is-
 land. Well 022-652-1 was drilled in 1961 to a depth of 950 feet and had