Cities with the Cleanest Air in Illinois.

Cities in Illinois with the most good AQI days per year.

156 cities ranked · See the national list

#	City	Population	Good AQI Days	Median AQI	Unhealthy Days
1	Springfield	113,330	256 days/yr	41	0 days/yr
2	Chatham	14,639	256 days/yr	41	0 days/yr
3	Crystal Lake	40,579	247 days/yr	42	1 days/yr
4	Algonquin	30,067	247 days/yr	42	1 days/yr
5	Lake in the Hills	28,800	247 days/yr	42	1 days/yr
6	McHenry	28,074	247 days/yr	42	1 days/yr
7	Huntley	28,005	247 days/yr	42	1 days/yr
8	Woodstock	26,147	247 days/yr	42	1 days/yr
9	Cary	17,923	247 days/yr	42	1 days/yr
10	Rockford	147,521	244 days/yr	40	1 days/yr
11	Moline	42,197	244 days/yr	41	2 days/yr
12	Rock Island	36,151	244 days/yr	41	2 days/yr
13	Loves Park	23,502	244 days/yr	40	1 days/yr
14	Machesney Park	22,630	244 days/yr	40	1 days/yr
15	East Moline	20,904	244 days/yr	41	2 days/yr
16	Roscoe	10,706	244 days/yr	40	1 days/yr
17	Bloomington	78,907	241 days/yr	44	1 days/yr
18	Normal	53,569	241 days/yr	44	1 days/yr
19	Champaign	89,996	240 days/yr	43	0 days/yr
20	Urbana	39,341	240 days/yr	43	0 days/yr
21	Rantoul	12,421	240 days/yr	43	0 days/yr
22	Decatur	69,815	237 days/yr	44	0 days/yr
23	Naperville	150,692	233 days/yr	42	1 days/yr
24	Wheaton	53,557	233 days/yr	42	1 days/yr
25	Downers Grove	50,054	233 days/yr	42	1 days/yr
26	Elmhurst	45,671	233 days/yr	42	1 days/yr
27	Lombard	43,619	233 days/yr	42	1 days/yr
28	Bartlett	40,501	233 days/yr	42	1 days/yr
29	Carol Stream	39,460	233 days/yr	42	1 days/yr
30	Hanover Park	36,732	233 days/yr	42	1 days/yr
31	Addison	35,489	233 days/yr	42	1 days/yr
32	Woodridge	33,941	233 days/yr	42	1 days/yr
33	Glendale Heights	32,808	233 days/yr	42	1 days/yr
34	Glen Ellyn	28,390	233 days/yr	42	1 days/yr
35	West Chicago	25,395	233 days/yr	42	1 days/yr
36	Westmont	23,724	233 days/yr	42	1 days/yr
37	Lisle	23,407	233 days/yr	42	1 days/yr
38	Roselle	22,752	233 days/yr	42	1 days/yr
39	Bloomingdale	22,457	233 days/yr	42	1 days/yr
40	Villa Park	22,345	233 days/yr	42	1 days/yr
41	Darien	21,879	233 days/yr	42	1 days/yr
42	Bensenville	18,603	233 days/yr	42	1 days/yr
43	Hinsdale	17,175	233 days/yr	42	1 days/yr
44	Warrenville	14,718	233 days/yr	42	1 days/yr
45	Wood Dale	13,933	233 days/yr	42	1 days/yr
46	Burr Ridge	11,141	233 days/yr	42	1 days/yr
47	Aurora	179,898	226 days/yr	45	1 days/yr
48	Elgin	114,934	226 days/yr	45	1 days/yr
49	Carpentersville	37,346	226 days/yr	45	1 days/yr
50	St. Charles	32,854	226 days/yr	45	1 days/yr
51	Batavia	27,151	226 days/yr	45	1 days/yr
52	South Elgin	24,217	226 days/yr	45	1 days/yr
53	Montgomery	21,515	226 days/yr	45	1 days/yr
54	Geneva	21,258	226 days/yr	45	1 days/yr
55	North Aurora	18,696	226 days/yr	45	1 days/yr
56	Pingree Grove	10,914	226 days/yr	45	1 days/yr
57	Campton Hills	10,877	226 days/yr	45	1 days/yr
58	Joliet	150,445	225 days/yr	44	1 days/yr
59	Bolingbrook	74,096	225 days/yr	44	1 days/yr
60	Plainfield	46,708	225 days/yr	44	1 days/yr
61	Romeoville	41,152	225 days/yr	44	1 days/yr
62	New Lenox	28,006	225 days/yr	44	1 days/yr
63	Lockport	26,409	225 days/yr	44	1 days/yr
64	Homer Glen	24,529	225 days/yr	44	1 days/yr
65	Frankfort	20,651	225 days/yr	44	1 days/yr
66	Crest Hill	20,628	225 days/yr	44	1 days/yr
67	Mokena	20,021	225 days/yr	44	1 days/yr
68	Shorewood	18,343	225 days/yr	44	1 days/yr
69	Channahon	13,927	225 days/yr	44	1 days/yr
70	Manhattan	11,026	225 days/yr	44	1 days/yr
71	Peoria	112,169	214 days/yr	45	2 days/yr
72	Granite City	26,549	191 days/yr	49	1 days/yr
73	Edwardsville	26,474	191 days/yr	49	1 days/yr
74	Alton	25,279	191 days/yr	49	1 days/yr
75	Collinsville	24,031	191 days/yr	49	1 days/yr
76	Godfrey	17,712	191 days/yr	49	1 days/yr
77	Glen Carbon	13,977	191 days/yr	49	1 days/yr
78	Troy	11,647	191 days/yr	49	1 days/yr
79	Wood River	10,279	191 days/yr	49	1 days/yr
80	Highland	10,262	191 days/yr	49	1 days/yr
81	Chicago	2,711,226	149 days/yr	53	5 days/yr
82	Cicero	82,797	149 days/yr	53	5 days/yr
83	Schaumburg	76,868	149 days/yr	53	5 days/yr
84	Evanston	76,340	149 days/yr	53	5 days/yr
85	Arlington Heights	76,005	149 days/yr	53	5 days/yr
86	Palatine	66,293	149 days/yr	53	5 days/yr
87	Skokie	66,219	149 days/yr	53	5 days/yr
88	Des Plaines	59,156	149 days/yr	53	5 days/yr
89	Orland Park	57,916	149 days/yr	53	5 days/yr
90	Oak Lawn	56,861	149 days/yr	53	5 days/yr
91	Berwyn	55,595	149 days/yr	53	5 days/yr
92	Mount Prospect	55,472	149 days/yr	53	5 days/yr
93	Tinley Park	54,842	149 days/yr	53	5 days/yr
94	Oak Park	53,292	149 days/yr	53	5 days/yr
95	Hoffman Estates	51,175	149 days/yr	53	5 days/yr
96	Glenview	47,752	149 days/yr	53	5 days/yr
97	Streamwood	39,001	149 days/yr	53	5 days/yr
98	Park Ridge	38,667	149 days/yr	53	5 days/yr
99	Wheeling	38,433	149 days/yr	53	5 days/yr
100	Calumet City	35,100	149 days/yr	53	5 days/yr
101	Northbrook	34,585	149 days/yr	53	5 days/yr
102	Elk Grove Village	31,987	149 days/yr	53	5 days/yr
103	Niles	30,064	149 days/yr	53	5 days/yr
104	Burbank	28,739	149 days/yr	53	5 days/yr
105	Lansing	28,284	149 days/yr	53	5 days/yr
106	Wilmette	27,503	149 days/yr	53	5 days/yr
107	Oak Forest	26,805	149 days/yr	53	5 days/yr
108	Chicago Heights	26,736	149 days/yr	53	5 days/yr
109	Morton Grove	24,619	149 days/yr	53	5 days/yr
110	Melrose Park	24,549	149 days/yr	53	5 days/yr
111	Rolling Meadows	24,027	149 days/yr	53	5 days/yr
112	Elmwood Park	23,868	149 days/yr	53	5 days/yr
113	Maywood	23,201	149 days/yr	53	5 days/yr
114	Blue Island	21,741	149 days/yr	53	5 days/yr
115	Park Forest	21,156	149 days/yr	53	5 days/yr
116	South Holland	20,911	149 days/yr	53	5 days/yr
117	Dolton	20,825	149 days/yr	53	5 days/yr
118	Harvey	20,230	149 days/yr	53	5 days/yr
119	Evergreen Park	19,420	149 days/yr	53	5 days/yr
120	Brookfield	19,331	149 days/yr	53	5 days/yr
121	Homewood	19,294	149 days/yr	53	5 days/yr
122	Matteson	18,645	149 days/yr	53	5 days/yr
123	Alsip	18,583	149 days/yr	53	5 days/yr
124	Bellwood	18,256	149 days/yr	53	5 days/yr
125	Franklin Park	18,197	149 days/yr	53	5 days/yr
126	Palos Hills	18,081	149 days/yr	53	5 days/yr
127	Lemont	17,820	149 days/yr	53	5 days/yr
128	Bridgeview	16,849	149 days/yr	53	5 days/yr
129	Westchester	16,436	149 days/yr	53	5 days/yr
130	Country Club Hills	16,324	149 days/yr	53	5 days/yr
131	La Grange	15,998	149 days/yr	53	5 days/yr
132	Prospect Heights	15,618	149 days/yr	53	5 days/yr
133	Norridge	15,439	149 days/yr	53	5 days/yr
134	Hickory Hills	14,526	149 days/yr	53	5 days/yr
135	Chicago Ridge	14,099	149 days/yr	53	5 days/yr
136	Midlothian	13,948	149 days/yr	53	5 days/yr
137	Forest Park	13,943	149 days/yr	53	5 days/yr
138	Hazel Crest	13,792	149 days/yr	53	5 days/yr
139	La Grange Park	13,447	149 days/yr	53	5 days/yr
140	Western Springs	13,446	149 days/yr	53	5 days/yr
141	Lincolnwood	13,112	149 days/yr	53	5 days/yr
142	Richton Park	12,521	149 days/yr	53	5 days/yr
143	Northlake	12,513	149 days/yr	53	5 days/yr
144	Winnetka	12,484	149 days/yr	53	5 days/yr
145	Justice	12,324	149 days/yr	53	5 days/yr
146	Palos Heights	12,152	149 days/yr	53	5 days/yr
147	River Forest	11,992	149 days/yr	53	5 days/yr
148	Schiller Park	11,393	149 days/yr	53	5 days/yr
149	Markham	11,355	149 days/yr	53	5 days/yr
150	Barrington	11,077	149 days/yr	53	5 days/yr
151	Summit	10,846	149 days/yr	53	5 days/yr
152	Worth	10,700	149 days/yr	53	5 days/yr
153	Crestwood	10,579	149 days/yr	53	5 days/yr
154	River Grove	10,451	149 days/yr	53	5 days/yr
155	Riverdale	10,340	149 days/yr	53	5 days/yr
156	Lyons	10,339	149 days/yr	53	5 days/yr