Ground-water withdrawal for the Houston district decreased from 451 to 419 million gallons per day between 1985 and 1989. Public supply, industrial, and irrigation withdrawals decreased by 11, 5, and 16 million gallons per day, respectively. Some data collected before 1985 and in early 1990 are included in the report to present long-term trends and relations. During 1977-90, water levels in some wells completed in the Chicot aquifer in the Houston district rose as much as 160 feet and declined as much as 80 feet. During 1958-90, water levels in wells completed in the Chicot aquifer in the Houston district rose as much as 140 feet and declined as much as 40 feet. Water levels in wells completed in the Evangeline aquifer in the Houston district rose as much as 160 feet and declined as much as 200 feet during 1977-90. From 1985 through 1989, water levels in wells completed in the Evangeline aquifer rose as much as 40 feet and declined as much as 140 feet in the Houston district. Chloride concen- trations in water from wells in the Houston district have not changed by more than 100 milligrams per liter from 1985 to 1989 except for one well in the eastern part of Galveston County. Well KH-65-48-316 showed a decrease in chloride concentration from 720 milligrams per liter in 1986 to 590 milligrams per liter in 1989.
Additional Publication Details
USGS Numbered Series
Ground-water withdrawals, water levels, and ground-water quality in the Houston district, Texas, with emphasis on 1985-89