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Worst Air Quality ZIP Codes in Colorado

Top 50 worst air quality zip codes in america in Colorado. ZIP-level data from EPA Air Quality Index.

Top 50

#	ZIP Code	City / Suburb	Median AQI
1	80011	Aurora	55
2	80019	Aurora	55
3	80022	Commerce City	55
4	80024	Derby	55
5	80030	Westminster	55
6	80031	Westminster	55
7	80045	Aurora	55
8	80102	Bennett	55
9	80103	Peoria	55
10	80136	Comanche Creek	55
11	80202	Denver	55
12	80203	Denver	55
13	80204	Denver	55
14	80205	Denver	55
15	80206	Denver	55
16	80207	Denver	55
17	80209	Denver	55
18	80210	Denver	55
19	80211	Denver	55
20	80212	Denver	55
21	80216	Denver	55
22	80218	Denver	55
23	80219	Denver	55
24	80220	Denver	55
25	80221	Berkley	55
26	80222	Denver	55
27	80223	Denver	55
28	80224	Denver	55
29	80229	Thornton	55
30	80230	Denver	55
31	80231	Denver	55
32	80233	Thornton	55
33	80234	Westminster	55
34	80236	Denver	55
35	80237	Denver	55
36	80238	Denver	55
37	80239	Denver	55
38	80241	Thornton	55
39	80246	Denver	55
40	80247	Denver	55
41	80249	Denver	55
42	80260	Thornton	55
43	80264	Denver	55
44	80266	Denver	55
45	80290	Denver	55
46	80293	Denver	55
47	80294	Denver	55
48	80601	Brighton	55
49	80602	Thornton	55
50	80603	Lochbuie	55

Methodology

This ranking is based on EPA Air Quality Index data, scoped to Colorado ZIP codes. Up to 50 ZIP codes are listed, ordered by median aqi. Data is refreshed periodically. See our methodology page for full details on data sources and update frequency.

Related rankings

Other states

California →Texas →Florida →New York →Illinois →Ohio →

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