. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. WATER SUPPLY AND USE 420. 320 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 YEAR Figure 7. Total ground-water use from facilities pumping 1 mgd or more in 1991 250 200 O) E lu 150 (3 ? Pennsylvanian/Mississippian » - ? ? ? ? ? —? ? ?— — ? 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 YEAR Figure 8. Total ground-water use from major aquifer units by facilities pumping 1 mg
. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. WATER SUPPLY AND USE 420. 320 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 YEAR Figure 7. Total ground-water use from facilities pumping 1 mgd or more in 1991 250 200 O) E lu 150 (3 ? Pennsylvanian/Mississippian » - ? ? ? ? ? —? ? ?— — ? 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 YEAR Figure 8. Total ground-water use from major aquifer units by facilities pumping 1 mgd or more in 1991 110. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Illinois. Dept. of Energy and Natural Resources; Critical Trends Assessment Project. Springfield, Ill. : Ill. Dept. of Energy and Natural Resources
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