Illinois PM2.5 24-hour Exceedance Summary

Value in each column is 24-hour concentration - standard of 35 micrograms per cubic meter

(values in micrograms per cubic meter)

Region	County	Site	7/25/23	7/24/23	7/16/23	7/15/23	6/29/23	6/28/23	6/27/23	6/26/23	6/23/23	6/15/23	6/6/23	6/4/23
Chicago Metropolitan	Cook	Alsip
	Cook	Chicago-Com Ed
	Cook	Chicago-Springfield Pump
	Cook	Chicago-Mayfair
	Cook	Chicago-Washington HS
	Cook	Cicero
	Cook	Des Plaines	51.3		45.6		65.3	137.7	148.1
	Cook	Kingery Near-Road	54.1		55.8		51.9	118.9	137.2	35.8
	Cook	McCook
	Cook	Northbrook	49.5		42.5		69.2	138.0	132.6	35.7
	Cook	Schiller Park	55.6	41.5	48.4		53.9	103.7	119.9
	Cook	Summit
	Du Page	Naperville					66.3	152.2	158.9	36.8
	Kane	Aurora
	Kane	Elgin
	McHenry	Cary	45.5	40.1	40.4		79.4	119.6	154.7
	Will	Braidwood			58.8		48.6	159.5	119.4
	Will	Joliet	47.5	37.3	57.9		60.1	170.6	146.6
Metro-East	Jersey	Jerseyville			37.1			77.4	52.9
	Madison	Alton
	Madison	Granite City-23rd&Madison
	Madison	Granite City-Gateway Medical
	Madison	Wood River
	Randolph	Houston						39.8
	St Clair	E St. Louis						67.4					35.9
Northern Illinois	Rock Island	Rock Island			61.0	36.0	78.2	156.7	121.5			49.6
Northern Illinois	Winnebago	Rockford	44.5	38.5	43.5		113.2	167.4	139.5		40.3	35.5		35.5
West Central Illinois	Peoria	Peoria
West Central Illinois	Sangamon	Springfield			48.3			172.1	68.5
East Central Illinois	Champaign	Bondville			54.8			201.8	95.7
	Champaign	Champaign
	Macon	Decatur			54.6			212.4	93.6
	McLean	Normal			75.4			214.1	116.4		40.2
Southeast Illinois	Hamilton	Knight Prairie			36.7			64.4					48.1