Local residents report that the vent is near the center of the pool. The north run has an average width of 50 ft with depths from 2 to 10 ft. It flows north about 300 ft, bifurcates around a delta-shaped wooded area, and empties to the east into the clear water of Spring Lake. Black Spring and the other springs of Jackson County are in the drain- age basin of the Apalachicola River. Analyses by U.S. Geological Survey.
Units are in milligrams per liter unless otherwise indicated.