Worst Air Quality in Colorado

Top 89 cities ranked by worst air quality

Best Cities For...

Composite rankings combining multiple weighted metrics, 5 topics across U.S. Census, FBI, NOAA and CDC data.

Best Cities for Retirees
Low crime, warm climate, affordable cost of living and strong healthcare access.
Best Cities for Remote Workers
Strong broadband, affordable rent, low traffic and existing remote-work culture.
Best Cities for Families
Strong schools, low crime, affordable homes and family-friendly commutes.
Best Cities for Young Professionals
High incomes, educated peers, transit access and an under-35 demographic.
Most Affordable Cities
The lowest cost of living across home prices, rent, services and rent burden.
Population & Density
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Economy
Highest Income Lowest Income Lowest Unemployment Highest Unemployment Lowest Poverty Highest Poverty Highest Wages Cheapest Cost of Living
Housing
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Demographics & Education
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Health & Safety
Safest Cities Highest Crime Healthiest Cities Lowest Smoking Best Doctor Access Best Dental Access
Climate & Air
Warmest Cities Coldest Cities Rainiest Cities Driest Cities Snowiest Cities Cleanest Air Worst Air Quality
Quality of Life
Shortest Commute Most Work From Home
Civic & Politics
Most Republican Most Democratic Most Disasters
Geography & Infrastructure
Highest Elevation Best Broadband Most EV Stations Most Libraries Most Restaurants
All Countries  ·  United States  ·  Colorado

Worst Air Quality - Colorado

1 Denver AQI 55
2 Derby AQI 55
3 Greenwood Village AQI 55
4 Welby AQI 55
5 Four Square Mile AQI 55
6 Cherry Creek AQI 55
7 Englewood AQI 55
8 Cherry Hills Village AQI 55
9 Northglenn AQI 55
10 Brighton AQI 55
11 Commerce City AQI 55
12 Dove Valley AQI 55
13 Thornton AQI 55
14 Meridian AQI 55
15 Centennial AQI 55
16 Todd Creek AQI 55
17 Aurora AQI 55
18 Fort Lupton AQI 54
19 Milliken AQI 54
20 Frederick AQI 54
21 Severance AQI 54
22 Fort Collins AQI 54
23 Lochbuie AQI 54
24 Firestone AQI 54
25 Berthoud AQI 54
26 Johnstown AQI 54
27 Loveland AQI 54
28 Timnath AQI 54
29 Wellington AQI 54
30 Windsor AQI 54
31 Mead AQI 54
32 Eaton AQI 54
33 Evans AQI 54
34 Greeley AQI 54
35 Dacono AQI 54
36 Applewood AQI 50
37 Ken Caryl AQI 50
38 Dakota Ridge AQI 50
39 Columbine AQI 50
40 Sheridan AQI 50
41 Littleton AQI 50
42 Evergreen AQI 50
43 West Pleasant View AQI 50
44 Golden AQI 50
45 Roxborough Park AQI 50
46 Lakewood AQI 50
47 Glenwood Springs AQI 49
48 Colorado Springs AQI 49
49 Gunbarrel AQI 49
50 Air Force Academy AQI 49
51 Carbondale AQI 49
52 Stratmoor AQI 49
53 Estes Park AQI 49
54 Rifle AQI 49
55 Security-Widefield AQI 49
56 Boulder AQI 49
57 Erie AQI 49
58 Fountain AQI 49
59 Cimarron Hills AQI 49
60 Fort Carson AQI 49
61 Longmont AQI 49
62 Grand Junction AQI 48
63 Parker AQI 48
64 Gleneagle AQI 48
65 Castle Rock AQI 48
66 Clifton AQI 48
67 Orchard Mesa AQI 48
68 Fruitvale AQI 48
69 Black Forest AQI 48
70 Lone Tree AQI 48
71 Fruita AQI 48
72 Highlands Ranch AQI 48
73 Redlands AQI 48
74 Woodmoor AQI 48
75 Stonegate AQI 48
76 Castle Pines AQI 48
77 The Pinery AQI 48
78 Monument AQI 48
79 Battlement Mesa AQI 46
80 Durango AQI 46
81 Cortez AQI 45
82 Pueblo AQI 44
83 Pueblo West AQI 44
84 Alamosa AQI 26
85 Aspen AQI 19
86 Salida AQI 13
87 Cañon City AQI 13
88 Steamboat Springs AQI 12
89 Craig AQI 12

Explore the top 89 cities ranked by worst air quality in Colorado.

City rankings help residents, researchers, and policymakers understand how communities compare across important quality-of-life measures.

Data is sourced from the U.S. Census Bureau, FBI Crime Statistics, and NOAA climate records.

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