
				Pat Quinn, Governor

Agency Links

Info Centers

To report
environmental
emergencies
only, call the
Illinois Emergency
Management Agency
800-782-7860
217-782-7860
(24 hrs/day)

Air Quality Information

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	5/11	5/12	5/13	5/14	5/15	5/16	5/17
Chicago Metropolitan	Cook	Alsip	66/61	47/40	53/50	67/59	68/65	50/39	56/53
	Cook	Chicago - ComEd	65/60	49/41	51/48	64/57	69/66	49/37	56/50
	Cook	Chicago - Jardine	63/59	49/47	54/52	66/59	67/63	51/42	57/53
	Cook	Chicago - SWFP	65/60	47/45	51/49	69/59	67/64	48/39	59/53
	Cook	Chicago - Taft	59/55	43/38	49/46	59/53	60/58	40/33	50/45
	Cook	Chicago - University	61/59	47/43	50/48	60/52	66/63	50/39	57/53
	Cook	Cicero	58/53	36/33	47/44	57/52	63/59	43/33	50/46
	Cook	Des Plaines	58/52	47/38	50/43	59/55	59/55	38/33	51/46
	Cook	Evanston	--/--	--/--	--/--	--/--	--/--	--/--	--/--
	Cook	Lemont	71/67	49/40	57/55	78/72	73/70	50/42	69/61
	Cook	Northbrook	68/62	52/45	53/50	70/63	71/68	42/39	57/50
	DuPage	Lisle	62/56	41/38	53/51	69/64	62/61	43/37	61/51
	Kane	Elgin	65/60	43/41	54/52	67/64	66/63	45/42	65/51
	Lake	Zion	67/58	51/44	53/50	67/59	70/68	42/41	50/49
	McHenry	Cary	62/59	48/43	54/51	69/64	67/64	45/41	52/48
	Will	Braidwood	66/63	41/36	55/53	72/67	68/65	46/41	63/59
Metro East	Jersey	Jerseyville	74/68	78/72	60/56	67/65	68/67	59/56	72/67
	Madison	Alton	69/66	77/70	59/56	66/63	73/67	62/57	71/67
	Madison	Maryville	65/62	65/63	60/57	67/64	78/73	61/56	68/64
	Madison	Wood River	65/62	74/67	56/54	67/61	72/67	59/54	70/65
	Randolph	Houston	64/60	58/54	68/65	69/66	79/69	64/61	74/69
	St. Clair	East St. Louis	66/62	68/63	63/57	69/64	75/71	60/55	70/64
Northern Illinois	Rock Island	Rock Island	58/52	38/36	53/49	60/55	58/54	48/42	62/54
Northern Illinois	Winnebago	Loves Park	64/60	49/44	59/55	66/65	64/61	52/49	50/35
West Central Illinois	Adams	Quincy	51/48	38/33	53/48	63/58	62/59	51/46	63/58
	Macoupin	Nilwood	64/61	67/63	56/54	68/65	66/65	58/54	67/63
	Peoria	Peoria	55/53	33/29	55/51	63/59	60/57	48/44	59/55
	Peoria	Peoria Heights	66/64	40/37	64/60	73/70	70/67	56/52	70/66
	Sangamon	Springfield	66/64	67/64	58/55	69/65	69/66	59/53	67/62
East Central Illinois	Champaign	Thomasboro	67/63	67/62	62/56	67/61	67/65	50/45	60/57
	McLean	Normal	69/66	71/53	61/59	70/67	74/69	54/50	69/65
	Macon	Decatur	61/58	61/58	61/56	66/62	66/65	51/48	68/63
Southeast Illinois	Effingham	Effingham	62/58	65/59	69/64	67/62	73/71	55/52	63/61
Southeast Illinois	Hamilton	Knight Prairie Township	65/61	58/52	71/68	68/62	76/72	70/65	75/68