1-Hr/8-Hr High Concentrations
(Values in Parts Per Billion)
First number in each column is 1-hour concentration - Standard of 125 parts per billion
Second number in each column is 8-hour concentration. - Standard of 70 parts per billion;
Region |
County |
Site |
3/17/24 |
3/16/24 |
3/15/24 |
3/14/24 |
3/13/24 |
3/12/24 |
3/11/24 |
3/10/24 |
3/9/24 |
3/8/24 |
3/7/24 |
3/6/24 |
3/5/24 |
3/4/24 |
3/3/24 |
3/2/24 |
3/1/24 |
Chicago Metropolitan |
Cook |
Alsip |
--/-- |
--/-- |
31/29 |
46/36 |
40/35 |
53/49 |
48/45 |
45/42 |
22/24 |
37/24 |
37/24 |
41/35 |
42/39 |
33/37 |
51/48 |
47/43 |
36/30 |
Cook |
Chicago - ComEd |
39/36 |
37/35 |
32/29 |
44/35 |
44/40 |
50/46 |
49/45 |
41/38 |
22/20 |
43/43 |
--/-- |
--/-- |
37/34 |
30/33 |
47/44 |
42/39 |
34/26 |
Cook |
Chicago - SWFP |
41/38 |
40/38 |
42/40 |
50/41 |
52/50 |
55/51 |
52/47 |
45/43 |
34/30 |
42/33 |
42/33 |
44/41 |
46/44 |
41/43 |
53/48 |
52/43 |
34/31 |
Cook |
Chicago - Taft |
39/37 |
38/35 |
36/33 |
47/36 |
53/48 |
53/47 |
48/45 |
43/41 |
27/26 |
35/23 |
35/23 |
37/35 |
42/40 |
37/40 |
49/45 |
46/41 |
33/29 |
Cook |
Cicero |
39/37 |
38/35 |
35/31 |
44/36 |
49/41 |
52/46 |
49/44 |
42/40 |
25/25 |
26/20 |
26/20 |
34/32 |
39/37 |
35/37 |
47/42 |
42/37 |
29/24 |
Cook |
Des Plaines |
39/36 |
37/35 |
36/32 |
47/39 |
51/47 |
51/46 |
46/42 |
41/40 |
27/26 |
35/28 |
35/28 |
36/35 |
41/39 |
35/38 |
46/42 |
41/37 |
34/28 |
Cook |
Evanston |
37/35 |
36/34 |
39/36 |
46/40 |
48/46 |
51/46 |
46/43 |
41/39 |
31/27 |
36/31 |
36/31 |
38/37 |
43/41 |
39/40 |
47/43 |
40/37 |
29/27 |
Cook |
Lemont |
42/38 |
40/37 |
39/32 |
50/40 |
50/42 |
54/51 |
52/48 |
44/42 |
25/26 |
32/22 |
32/22 |
38/35 |
41/37 |
33/35 |
47/44 |
47/41 |
36/31 |
Cook |
Northbrook |
36/34 |
35/33 |
36/34 |
45/40 |
47/46 |
52/48 |
46/43 |
41/39 |
27/26 |
35/29 |
35/29 |
37/36 |
41/40 |
38/40 |
46/43 |
42/37 |
33/29 |
Cook |
Schiller Park |
37/34 |
36/32 |
37/31 |
44/34 |
45/42 |
49/43 |
45/42 |
41/39 |
27/26 |
31/18 |
31/18 |
36/34 |
40/38 |
35/37 |
46/43 |
41/37 |
30/24 |
DuPage |
Lisle |
38/34 |
36/33 |
41/31 |
42/34 |
43/39 |
48/44 |
45/42 |
40/38 |
24/23 |
30/21 |
30/21 |
34/31 |
36/33 |
25/30 |
42/39 |
41/37 |
28/25 |
Kane |
Elgin |
38/35 |
36/34 |
42/37 |
44/37 |
50/46 |
50/46 |
44/41 |
41/40 |
26/25 |
33/26 |
33/26 |
39/35 |
38/36 |
30/34 |
44/40 |
43/39 |
33/28 |
Lake |
Zion |
38/37 |
38/35 |
42/39 |
44/38 |
51/49 |
52/49 |
48/45 |
43/41 |
30/28 |
38/33 |
38/33 |
39/38 |
43/40 |
40/40 |
48/45 |
43/39 |
33/29 |
McHenry |
Cary |
37/35 |
36/34 |
43/39 |
44/38 |
52/49 |
50/47 |
45/42 |
42/41 |
26/25 |
34/29 |
34/29 |
39/36 |
39/35 |
29/33 |
43/40 |
43/38 |
32/28 |
Will |
Braidwood |
37/36 |
38/36 |
43/38 |
51/41 |
50/46 |
52/48 |
48/41 |
42/40 |
22/24 |
21/19 |
21/19 |
33/31 |
32/29 |
24/18 |
44/40 |
46/41 |
30/28 |
Metro East |
Jersey |
Jerseyville |
--/-- |
--/-- |
--/-- |
--/-- |
--/-- |
--/-- |
--/-- |
--/-- |
--/-- |
--/-- |
--/-- |
--/-- |
--/-- |
--/-- |
--/-- |
--/-- |
--/-- |
Madison |
Alton |
42/39 |
47/45 |
42/40 |
43/40 |
54/48 |
56/50 |
52/48 |
43/40 |
35/22 |
23/19 |
23/19 |
37/34 |
29/27 |
30/28 |
45/39 |
46/43 |
32/29 |
Madison |
Maryville |
41/39 |
45/44 |
42/40 |
42/38 |
49/45 |
51/49 |
49/46 |
43/40 |
32/27 |
24/20 |
24/20 |
36/33 |
26/24 |
31/29 |
43/37 |
43/41 |
35/32 |
Madison |
Wood River |
43/41 |
49/46 |
44/42 |
44/41 |
54/48 |
55/49 |
51/45 |
45/41 |
34/23 |
25/20 |
25/20 |
37/34 |
29/27 |
30/27 |
45/39 |
46/43 |
32/29 |
Randolph |
Houston |
42/40 |
45/42 |
43/38 |
39/32 |
45/43 |
49/47 |
47/44 |
44/40 |
36/31 |
23/20 |
23/20 |
38/33 |
36/29 |
34/32 |
42/36 |
43/40 |
35/32 |
St. Clair |
East St. Louis |
42/40 |
46/44 |
42/39 |
40/36 |
49/43 |
54/50 |
49/44 |
43/37 |
33/21 |
21/18 |
21/18 |
40/35 |
26/24 |
29/26 |
42/37 |
42/39 |
34/30 |
Northern Illinois |
Rock Island |
Rock Island |
37/35 |
39/35 |
45/41 |
45/39 |
49/42 |
52/48 |
48/45 |
44/40 |
25/23 |
26/23 |
26/23 |
40/36 |
34/32 |
36/32 |
47/44 |
45/43 |
39/36 |
Winnebago |
Loves Park |
37/35 |
36/34 |
42/38 |
42/39 |
54/49 |
49/46 |
46/43 |
42/40 |
30/27 |
32/29 |
32/29 |
42/38 |
38/36 |
32/33 |
41/38 |
44/41 |
39/33 |
West Central Illinois |
Adams |
Quincy |
40/37 |
44/41 |
45/42 |
46/41 |
56/52 |
55/50 |
51/47 |
44/41 |
23/24 |
26/22 |
26/22 |
45/42 |
31/30 |
36/34 |
45/43 |
48/46 |
43/39 |
Macoupin |
Nilwood |
40/38 |
45/42 |
43/40 |
46/42 |
55/48 |
57/49 |
52/45 |
42/40 |
38/26 |
21/19 |
21/19 |
33/32 |
29/27 |
30/27 |
44/38 |
42/39 |
34/31 |
Peoria |
Peoria |
41/39 |
42/40 |
45/40 |
49/43 |
51/44 |
53/49 |
52/45 |
43/41 |
26/24 |
28/22 |
28/22 |
35/32 |
35/33 |
36/32 |
43/39 |
44/40 |
35/31 |
Peoria |
Peoria Heights |
38/37 |
41/39 |
44/41 |
50/45 |
53/50 |
54/52 |
53/49 |
43/40 |
27/24 |
28/23 |
28/23 |
35/33 |
36/34 |
36/32 |
45/41 |
44/41 |
35/31 |
Sangamon |
Springfield |
39/36 |
44/40 |
41/38 |
46/43 |
52/48 |
60/52 |
49/46 |
40/37 |
33/23 |
21/18 |
21/18 |
31/29 |
27/24 |
31/29 |
45/40 |
42/39 |
32/30 |
East Central Illinois |
Champaign |
Thomasboro |
40/38 |
43/41 |
42/36 |
46/43 |
55/49 |
55/49 |
51/45 |
40/38 |
38/34 |
25/21 |
25/21 |
38/33 |
31/28 |
32/27 |
43/40 |
43/39 |
32/28 |
McLean |
Normal |
41/39 |
43/41 |
45/40 |
54/48 |
55/50 |
61/54 |
51/47 |
43/40 |
36/27 |
31/24 |
31/24 |
35/32 |
33/31 |
33/30 |
45/41 |
46/42 |
36/32 |
Macon |
Decatur |
39/37 |
44/41 |
43/38 |
44/41 |
53/49 |
52/47 |
51/45 |
41/38 |
33/28 |
32/26 |
32/26 |
35/30 |
28/24 |
32/28 |
45/41 |
47/42 |
32/29 |
Southeast Illinois |
Effingham |
Effingham |
40/39 |
46/43 |
41/38 |
38/34 |
49/46 |
50/46 |
47/44 |
40/38 |
36/29 |
28/25 |
28/25 |
27/25 |
28/22 |
36/31 |
41/38 |
36/33 |
29/27 |
Hamilton |
Knight Prairie Township |
43/41 |
46/43 |
42/38 |
38/34 |
48/45 |
49/47 |
46/44 |
42/39 |
34/28 |
24/20 |
24/20 |
29/27 |
42/37 |
37/34 |
42/40 |
39/36 |
31/29 |