. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. AIR QUALITY TRENDS IN ILLINOIS -1â1âIâIâIâ1âIâIâIâr n :i. c _o fo â¢4â' c 0) o c o o - Whole state 0A5/ ): - Analysis of individual filters for metals began in 1985. O O O O Pb ii N:0 0 0 0 0 0 0 18 23 23 23 17 19 I I I I I I I I I I I I I T 1 1 1 1 1 1 T Chicago area ^1,^ _ N:0 0 0 0 0 0 0 6 12 12 12 8 8 I I I ' I ' I I I I I I L. I I I I I I I I I
. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. AIR QUALITY TRENDS IN ILLINOIS -1â1âIâIâIâ1âIâIâIâr n :i. c _o fo â¢4â' c 0) o c o o - Whole state 0A5/ ): - Analysis of individual filters for metals began in 1985. O O O O Pb ii N:0 0 0 0 0 0 0 18 23 23 23 17 19 I I I I I I I I I I I I I T 1 1 1 1 1 1 T Chicago area ^1,^ _ N:0 0 0 0 0 0 0 6 12 12 12 8 8 I I I ' I ' I I I I I I L. I I I I I I I I I r Metro-East area nâr~ O \- I X I N: 00000 0065SS46 III I I I r I â1â1â1â1â1â1â1âr I I I I Tâ Remainder of state o 9 iliiii. N:000 000 066665 5 1 1 1 1 1 1 1 1 1 1 1 1 1 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 Note: There are no national or state standards for As. N = number of samples. Figure 19. Trends in 24-hr maximum As concentrations in Illinois. CO D) c g To is c o c o O â1âIâIâIâIâIâIâIâIâIâIâIâr- Whole state o o T T Q Q O O N:104 86 73 66 12 15 15 17 21 22 20 14 17 I I I I I I I I I I I I l_ I â1â "X" âr- âIâ 1 1 1 1 Chicago 1 1 area o . o â ;i S jQ -& ^ ^ -S0c= ^â¢m- . N;60 1 39 _1_ 28 _l_ 25 2 4 _1_ 4 5 11 12 11 _J 1 1 L. 6 8 _l 1 â1âIâIâIâIâIâIâIâIâIâIâIâIâ Metro-East area o o. ?^?bD N:15 17 17 15 4 5S6S6S44 I I I I I I I I I I I I l_ -1 1 1 1 1 1 1 1âr- Remalnder of state N:29 30 28 26 666656448 1 I I I I I I I I I I I l_ 78 79 80 81 82 83 84 85 86 87 88 89 90 78 79 80 81 82 83 84 65 86 87 88 89 90 Year Note: There are no national or state standards for As. N = number of samples. Figure 20. Trends in annual mean As concentrations in Illinois. Ill. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - colorati
Size: 2197px × 1137px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksubjecte, booksubjectecology, booksubjectman
