U.S. GEOLOGICAL SURVEY GROUND-WATER STUDIES IN NEW YORK GROUND-WATER ISSUES

rely on ground water for drinking supplies. Of those who depend on ground water, more than one-half live on Long Island where ground-water withdrawals total 486 million gallons per day (Mgal/d). A total of 487 Mgal/d is withdrawn in other parts of the State. Ground water in New York generally is suitable for most uses. Of the total ground water used, 51 percent is used for public supply, 22 percent for rural supply (domestic and livestock), 25 percent for industrial self-supplied, and 2 per-cent for irrigation. The major issues related to ground-water resource management in New York are: Ground-water quantity, including water-supply planning, saltwater intrusion, and artificial recharge, and Ground-water quality, including the effects of landfills, hazardous-waste sites, and land use