land under cultivation; others may average only one well for as much as 5 acres. These wells range from about 2 to 8 inches in diameter and from about 50 to more than 300 feet in depth. However, most of them are between 2 and 5 inches in diameter and between 75 and 250 feet in depth. They are cased to depths of about 20 to 80 feet. Most of the wells will flow under artesian pressure with yields ranging from only a few gallons to more than 100 gallones- a: minute. The wells on higher ground do not flow, but the water rises in them to a level within a few feet of the surface. Two wells of this type at Oviedo and a few in the southwestern part of the county are used for drainage. Nonflowing wells yield water from the Ocala limestone for the public water supply of Sanford.
Palm and Sanlando Springs, in the southwestern part of the county, have been developed for swimming and recreation. These springs are the largest in the county. It appears that their water is derived from the Hawthorn formation, but some of it may be coming from the Ocala limestone. There are a few small springs on the south side of Lake Jessup and in the valley of the St. Johns River. Water from Elder Spring, a few miles south of Sanford is soft and is bottled and sold for drinking. It comes from the surficial sands.
Artesian conditions
The Ocala limestone contains water under artesian pressure
throughout Seminole County and supplies many flowing wells in the low
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