. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. N:124 127 93 86 30 46 47 49 36 39 27 15 17 I I I I I I I I I I I I 1_ I I I I I 1 I I I I I I P Metro-East area 6 ^°^ N;13 17 17 15 455655544 I I I I I I I I I I I I 1_ I I I I 1 I I I I I I I I" Chicago area. N:eO 80 48 45 20 35 36 37 26 29 18 7 8 I I I I I I I I I I I I I —1 1 1—I 1 1 1 1 1 1 1 1 T Remainder of state ^QB^S N:29 30 28 26 666655445 I I I I I I I i_ 78 79 80 81 82 83 84 85 86 87
. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. N:124 127 93 86 30 46 47 49 36 39 27 15 17 I I I I I I I I I I I I 1_ I I I I I 1 I I I I I I P Metro-East area 6 ^°^ N;13 17 17 15 455655544 I I I I I I I I I I I I 1_ I I I I 1 I I I I I I I I" Chicago area. N:eO 80 48 45 20 35 36 37 26 29 18 7 8 I I I I I I I I I I I I I —1 1 1—I 1 1 1 1 1 1 1 1 T Remainder of state ^QB^S N:29 30 28 26 666655445 I I I I I I I i_ 78 79 80 81 82 83 84 85 86 87 88 89 90 78 79 80 81 82 83 84 85 86 87 88 89 90 Year 2- Note: There are no national or state standards for SO^ . N = number of samples. Figure 18. Trends in annual mean SO J' concentrations in Illinois. 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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