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Air Quality Information

Illinois Ozone 8-hour Exceedance Summary

8-hour Exceedances Summary

Values in each column is 8-hour concentration - standard of 75 parts per billion;

Region	County	Site	5/18	5/19	5/23	5/24	5/27	5/29	6/8	6/9	6/10	6/14	6/15	6/23	6/24	6/27	6/28	6/29	6/30	7/2	7/3	7/5	7/6	7/7	7/8	7/11	7/12	7/15	7/19	7/21	7/22	7/23	7/24	7/30	7/31	8/1	8/2	8/3	8/6	8/7	8/8	8/9	8/15	8/23	8/24	8/25	8/30
Chicago Metropolitan	Cook	Alsip		77									86		79		87										76			77								87							77
	Cook	Chicago - Com Ed		76									81		79		83						84														79	96
	Cook	Chicago - Jardine		84		76							80				92			79			90				79			78		79					99	91							85	90
	Cook	Chicago - SWFP		84									83		82		98			86		79	103				76	77		80							94	91							81
	Cook	Chicago - Taft											84										83														86	79
	Cook	Chicago - University		81									81		80		81						96														92	91
	Cook	Cicero											81		80		84						100									76					83	94							76
	Cook	Des Plaines											85																								81								76
	Cook	Evanston		93		77	78			76			90		85				90	97	78						77			82							96	85							86	100
	Cook	Lemont		81						78			86	78	77		89																					80							85
	Cook	Northbrook		85						78			94		81	77	84		90	87			87				80					77		79			92	85							85	82
	DuPage	Lisle											78																									81
	Kane	Elgin											87														76											93
	Lake	Zion		92		81	83		80	82	82		96		80	79	88		89	90			93				81							80			79	80							95	103
	McHenry	Cary											96				77										80											82
	Will	Braidwood											76
Metro-East	Jersey	Jerseyville	89						80	76		89	85		95	107		80									77				82									96			82	85			81
	Madison	Alton	81									81	76		84	93	81	89	78	93							78
	Madison	Maryville	78									79	78			82	95	100															80		97				76	84	77	81		76	79
	Madison	Wood River	80									83	77		82	91	81	91	82	86				84			77					77			83			79		98				87	79
	Randolph	Houston	77		78							79	80			86	81	90							76										78	76				78	81	77
	St. Clair	East St. Louis						82				79			76	81	78	86						92	79								82		91	80			83	76		78		78
Northern Illinois	Rock Island	Rock Island
Northern Illinois	Winnebago	Loves Park
West Central Illinois	Adams	Quincy										86					81
	Macoupin	Nilwood	77
	Peoria	Peoria
	Peoria	Peoria Heights	79									76	78			82				76																								77	81
	Sangamon	Springfield											76			81	79			76							76						77
East Central Illinois	Champaign	Thomasboro											78				81
	McLean	Normal	79	80									79				80																											76	79
	Macon	Decatur															77	78																			78								76
Southeast Illinois	Effingham	Effingham															92																												77
Southeast Illinois	Hamilton	Knight Prairie Township										77					86	91						80		87			76						81						85	78		78

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