FLORIDA GEOLOGICAL SURVEY


iron are found in the west-central part of the area. Iron greater
than 0.20 ppm generally should be removed for most uses.
 Other dissolved mineral constituents, including silica, potassium,
sulfate, and chloride, occur in concentrations generally less thail
10 ppm. Fluoride and nitrate are usually present in concentrations
less than 1.0 ppm. The water is clear (color less than 5 units), the
temperature ranges from 74 to 780F., and the pH ranges from 6.8
to 8.6 units.
 Water from a well (830-210-2) near the northwestern boundary
had a sulfate concentration of 101 ppm. The high sulfate
concentration is due to contact of water with gypsum. Samples of


Figure 41. Hardness of water in the Floridan aquifer in the Green Swaml
 area.