FLORIDA GEOLOGICAL SURVEY


pumped at 2,000 gpm each and three wells of less capacity. The wells
are from 234 to 270 feet deep and are equipped with 100 feet of screen.
 The City of Pensacola abandoned six wells near the water plant be-
cause of interference between the closely spaced wells and maintenance
problems caused by the age of the wells. They also abandoned a well
at 12th Avenue and Hayes Street due to obvious industrial waste pol-
lution. The city wells have not experienced salt-water encroachment.
Present plans call for new wells to be located about one mile apart and
one mile from any surface body of salt water.
 The People's Water Service in Warrington furnished 2.5 mgd from six
wells in 1962. This company has not had any trouble from salt-water en-
croachment. One well was abandoned in 1960 due to a high iron con-
tent of the water.
 The other public water supplies in the Pensacola area were estimated
to pump about 2.2 mgd of ground water in 1962. Public water supplies
are also located in Bagdad, Cantonment, Century, East Milton, Gulf
Breeze, Jay, Milton, and Navarre Beach. The total groundwater pumpage
from these supplies outside and the Pensacola area was estimated to be 1
mgd in 1962. Pensacola Beach obtains its fresh water supply through a
pipe line from the City of Pensacola.
 Figure 44 illustrates the increased use of ground water by the City of
Pensacola. In 1933, the average yearly pumpage was 2.09 mgd; the low-
est average monthly pumpage, 1.78 mgd, occurred in March and the
highest average monthly pumpage, 2.42 mgd, occurred in September. In
1962. the average yearly pumpage was 11.4 mgd; the lowest average
monthly pumpage, 8.25 mgd, occurred in February, and the highest
average monthly pumpage, 18.6 mgd, occurred in May. The highest
pumpage in one day was 22.9 mgd on May 23, 1962. Data from the
graph in figure 44 indicate the increased pumping rates that will be
needed in the future.
 The cities of Pensacola and Gulf Breeze, and some other local sup-
 pliers benefit because of the lower mineral content of the ground water.
 The raw ground water requires little treatment and the water can be
 treated at the well site. Therefore, the wells can be drilled in the areas
 of need and the treated water distributed from the well sites. Many pub-
 lic water plants in the other areas must pump the raw water to a central
 point where it is treated and then distributed. Treating the water at the
 well sites enables the cities to use smaller diameter distribution lines.
 This also spaces the wells farther apart. The wider spacing is good prac-
 tice because it reduces the large cone of depression caused by pumping
 closely spaced wells.