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Groups At Risk
10,554,874
2,708,039
1,189,261
251,306
650,892
332,718
139,140
2,577,012
591,798
| Adams |
67,221
|
15,308
|
11,649
|
1,421
|
4,284
|
2,312
|
1,116
|
19,608
|
4,467
|
| Champaign |
185,682
|
37,220
|
18,525
|
3,454
|
12,180
|
5,837
|
2,155
|
41,969
|
9,617
|
| Clark |
16,987
|
3,826
|
2,911
|
355
|
1,087
|
587
|
282
|
4,967
|
1,132
|
| Cook |
5,288,655
|
1,357,756
|
617,749
|
126,000
|
325,805
|
167,028
|
70,605
|
1,302,314
|
298,808
|
| Du Page |
932,670
|
237,491
|
96,569
|
22,039
|
58,043
|
29,928
|
12,438
|
230,877
|
53,228
|
| Effingham |
34,429
|
8,830
|
5,008
|
819
|
2,119
|
1,123
|
516
|
9,227
|
2,109
|
| Hamilton |
8,335
|
1,762
|
1,636
|
164
|
543
|
300
|
152
|
2,620
|
596
|
| Jersey |
22,628
|
4,898
|
3,325
|
455
|
1,467
|
771
|
348
|
6,259
|
1,431
|
| Kane |
493,735
|
143,420
|
40,205
|
13,309
|
29,071
|
14,343
|
5,439
|
104,730
|
24,151
|
| La Salle |
113,065
|
26,286
|
17,791
|
2,439
|
7,178
|
3,829
|
1,789
|
31,797
|
7,260
|
| Lake |
713,076
|
198,058
|
64,539
|
18,380
|
42,896
|
21,654
|
8,603
|
162,546
|
37,495
|
| Macon |
109,309
|
25,420
|
17,210
|
2,359
|
6,965
|
3,760
|
1,776
|
31,441
|
7,190
|
| Macoupin |
48,841
|
10,828
|
8,104
|
1,005
|
3,145
|
1,691
|
804
|
14,200
|
3,240
|
| Madison |
265,303
|
61,579
|
36,877
|
5,715
|
16,877
|
8,840
|
3,944
|
71,281
|
16,316
|
| Mchenry |
312,373
|
84,109
|
28,608
|
7,805
|
18,980
|
9,527
|
3,757
|
71,204
|
16,413
|
| Mclean |
161,202
|
36,331
|
15,663
|
3,372
|
10,297
|
5,026
|
1,908
|
36,724
|
8,435
|
| Peoria |
182,495
|
45,065
|
25,255
|
4,182
|
11,389
|
5,989
|
2,691
|
48,509
|
11,103
|
| Randolph |
33,028
|
6,862
|
4,925
|
637
|
2,161
|
1,130
|
507
|
9,148
|
2,090
|
| Rock Island |
147,545
|
33,547
|
22,730
|
3,113
|
9,442
|
5,030
|
2,332
|
41,567
|
9,500
|
| Sangamon |
193,524
|
45,524
|
26,320
|
4,225
|
12,304
|
6,497
|
2,911
|
52,526
|
12,044
|
| St Clair |
260,919
|
66,855
|
32,724
|
6,204
|
16,077
|
8,321
|
3,609
|
65,923
|
15,106
|
| Will |
668,217
|
183,202
|
53,194
|
17,001
|
40,197
|
19,641
|
7,288
|
141,595
|
32,654
|
| Winnebago |
295,635
|
73,862
|
37,744
|
6,854
|
18,386
|
9,554
|
4,169
|
75,980
|
17,414
|
| TOTAL: |
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1. Total Population is based on 2006 US Census and represents the at-risk populations in counties with ozone or PM 2.5 pollution monitors; it does not represent the entire state's sensitive populations.
2. Those 18 years of age & under and 65 years of age & over are vulnerable to ozone and PM 2.5. They should not be used as population denominators for disease estimates.
3. Pediatric asthma estimates are for those under 18 years of age and represent the estimated number of people who had asthma in 2006 based on national rates (NHIS) applied to county population estimates (US Census).
4. Adult asthma estimates are for those 18 years and older and represent the estimated number of people who had asthma during 2006 based on state rates (BRFSS) applied to county population estimates (US Census).
5. Chronic bronchitis estimates are for adults 18 years of age and over who had been diagnosed within 2006 based on national rates (NHIS) applied to county population estimates (US Census).
6. Emphysema estimates are for adults 18 years of age and over who have been diagnosed within their lifetime based on national rates (NHIS) applied to county population estimates (US Census).
7. CV disease estimates are for adults 18 years of age and over who had been diagnosed within 2006 based on national rates (NHIS) applied to county population estimates (US Census). CV disease includes coronary heart disease, hypertension, stroke, angina pectoris and heart attack.
8. Diabetes estimates are for adults 18 years of age and over who have been diagnosed within their lifetime based on national rates (NHIS) applied to county population estimates (US Census).
9. Adding across rows does not produce valid estimates. For example, because of differences in the surveys used to gather the information, adding pediatric and adult asthma does not produce an accurate estimate of total population with asthma. Adding emphysema and chronic bronchitis will double count people with both diseases.
10. Changes to the county grades and monitoring from those found in the 2007 report are noted on the last page of each state's section in the full report, available from the menu on the left.
More about Methodology.
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State of the Air: 2008 
