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Illinois Ozone Highs
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 75 parts per billion;
| Region |
County |
Site |
2011 1hr 1st |
2011 1hr 2nd |
2011 1hr 3rd |
2011 1hr 4th |
2011 8hr 1st |
2011 8hr 2nd |
2011 8hr 3rd |
2011 8hr 4th |
| Chicago Metropolitan |
Cook |
Alsip |
92 |
88 |
85 |
81 |
80 |
76 |
73 |
71 |
| Cook |
Chicago - ComEd |
97 |
93 |
84 |
83 |
82 |
78 |
76 |
73 |
| Cook |
Chicago - Jardine |
100 |
93 |
89 |
88 |
85 |
76 |
74 |
74 |
| Cook |
Chicago - SWFP |
104 |
98 |
93 |
90 |
89 |
86 |
82 |
79 |
| Cook |
Chicago - Taft |
84 |
83 |
72 |
72 |
76 |
70 |
67 |
67 |
| Cook |
Chicago - University |
139 |
90 |
89 |
87 |
89 |
79 |
77 |
74 |
| Cook |
Cicero |
101 |
89 |
82 |
81 |
89 |
74 |
72 |
72 |
| Cook |
Des Plaines |
89 |
85 |
78 |
77 |
76 |
72 |
68 |
65 |
| Cook |
Evanston |
112 |
99 |
91 |
85 |
88 |
82 |
79 |
78 |
| Cook |
Lemont |
94 |
93 |
82 |
81 |
82 |
73 |
71 |
69 |
| Cook |
Northbrook |
108 |
94 |
89 |
86 |
86 |
80 |
77 |
76 |
| DuPage |
Lisle |
92 |
89 |
81 |
78 |
76 |
73 |
71 |
68 |
| Kane |
Elgin |
92 |
85 |
82 |
81 |
78 |
75 |
74 |
70 |
| Lake |
Zion |
126 |
99 |
97 |
88 |
95 |
85 |
83 |
76 |
| McHenry |
Cary |
93 |
86 |
84 |
82 |
79 |
74 |
72 |
71 |
| Will |
Braidwood |
106 |
106 |
75 |
70 |
91 |
74 |
63 |
61 |
| Metro East |
Jersey |
Jerseyville |
109 |
104 |
97 |
88 |
88 |
78 |
77 |
76 |
| Madison |
Alton |
95 |
93 |
92 |
91 |
85 |
81 |
77 |
76 |
| Madison |
Maryville |
103 |
101 |
100 |
95 |
88 |
86 |
84 |
81 |
| Madison |
Wood River |
103 |
97 |
97 |
96 |
87 |
86 |
84 |
81 |
| Randolph |
Houston |
76 |
73 |
72 |
72 |
69 |
67 |
67 |
66 |
| St. Clair |
East St. Louis |
102 |
98 |
94 |
93 |
86 |
80 |
76 |
76 |
| Northern Illinois |
Rock Island |
Rock Island |
71 |
69 |
68 |
65 |
62 |
62 |
59 |
55 |
| Winnebago |
Loves Park |
84 |
79 |
73 |
73 |
75 |
70 |
68 |
68 |
| West Central Illinois |
Adams |
Quincy |
78 |
76 |
72 |
72 |
70 |
70 |
67 |
66 |
| Champaign |
Thomasboro |
96 |
87 |
86 |
80 |
88 |
81 |
80 |
76 |
| Macon |
Decatur |
98 |
86 |
84 |
84 |
90 |
76 |
75 |
75 |
| Macoupin |
Nilwood |
95 |
95 |
91 |
89 |
86 |
83 |
78 |
75 |
| McLean |
Normal |
99 |
87 |
80 |
77 |
84 |
75 |
70 |
68 |
| East Central Illinois |
Peoria |
Peoria |
91 |
75 |
74 |
73 |
76 |
69 |
68 |
66 |
| Peoria |
Peoria Heights |
111 |
80 |
77 |
76 |
89 |
73 |
71 |
69 |
| Sangamon |
Springfield |
98 |
98 |
93 |
92 |
87 |
80 |
79 |
79 |
| Southeast Illinois |
Effingham |
Effingham |
79 |
77 |
75 |
73 |
73 |
69 |
67 |
66 |
| Hamilton |
Knight Prairie Township |
92 |
87 |
86 |
82 |
78 |
78 |
76 |
74 |
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