certain localities in the eastern and northeastern parts of the county. Water from the Ocala limestone and Hawthorn formation is hard, and some of it in the eastern and northeastern parts of the county is highly mineralized and harmful to crops irrigated with it.
Field tests of the chloride content of samples of water from ndmerous wells were made in order to indicate the relative saltiness. Water has a distinct salty taste if it contains as much as 1,000 parts per million of chloride, and in order to be acceptable to most people for drinking it should contain lees than 250 parts per million. The field tests indicate that the chloride content of ground water in Seminole County ranges from less than 50 parts per million in the southwestern part of the county to more than 5,000 parts in some wells in the northeastern part. The area in which the water is relatively high in chloride includes a large part of the Sanford and Oviedo celery districts. A few measurements of the artesian head in different parts of the county indicate that the highly mineralized water is found in a general way in areas 'of relatively low head.
Conclusions
The preliminary work shows that a detailed investigation is
needed to determine the proper course to follow in the protection, conservation and further development of the artesian water supply, which is very valuable for irrigation and for public and domestic use. In
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