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Cleanest Air Cities in Colorado

Lowest pollution levels for healthy outdoor living.

Best Climate Cleanest Air Sunniest Most Urban All Rankings →
All United States  ·  Colorado

How We Score

Each metric is normalized 0-100 across U.S. cities, then weighted and summed. Cities missing any metric are excluded.

Clean Air · 65% Sunshine · 20% Low Rain · 15%

Top 12 Cleanest Air Cities in Colorado

Ranked by composite score across 3 weighted metrics.

#1
Score 94.3
Alamosa, CO
9,847 residents
Clean Air 26
Sunshine 330 days
Low Rain 7
#2
Score 60.7
Center, CO
2,312 residents
Clean Air 41
Sunshine 330 days
Low Rain 7
#3
Score 60.7
Alamosa East, CO
1,404 residents
Clean Air 41
Sunshine 330 days
Low Rain 7
#4
Score 60.3
Sanford, CO
1,047 residents
Clean Air 41
Sunshine 330 days
Low Rain 8
#5
Score 59.9
Olathe, CO
1,788 residents
Clean Air 41
Sunshine 330 days
Low Rain 8
#6
Score 59.6
Howard, CO
1,159 residents
Clean Air 41
Sunshine 330 days
Low Rain 9
#7
Score 59.5
Fruitvale, CO
7,998 residents
Clean Air 41
Sunshine 330 days
Low Rain 9
#8
Score 59.5
Clifton, CO
19,746 residents
Clean Air 41
Sunshine 330 days
Low Rain 9
#9
Score 59.2
Monte Vista, CO
4,178 residents
Clean Air 41
Sunshine 330 days
Low Rain 9
#10
Score 59.2
Montrose, CO
20,703 residents
Clean Air 41
Sunshine 330 days
Low Rain 9
#11
Score 58.9
Del Norte, CO
1,576 residents
Clean Air 41
Sunshine 330 days
Low Rain 10
#12
Score 58.8
Fruita, CO
13,578 residents
Clean Air 41
Sunshine 330 days
Low Rain 10

Full Ranking, Colorado

Top 50 cities. Click any city to see its full profile.

1 Alamosa CO 94.3
2 Center CO 60.7
3 Alamosa East CO 60.7
4 Sanford CO 60.3
5 Olathe CO 59.9
6 Howard CO 59.6
7 Fruitvale CO 59.5
8 Clifton CO 59.5
9 Monte Vista CO 59.2
10 Montrose CO 59.2
11 Del Norte CO 58.9
12 Fruita CO 58.8
13 Loma CO 58.8
14 Buena Vista CO 58.7
15 Palisade CO 58.3
16 Salida CO 58.3
17 Rifle CO 58.1
18 Ordway CO 57.8
19 Redlands CO 57.8
20 Grand Junction CO 57.7
21 Orchard Mesa CO 57.7
22 Towaoc CO 57.5
23 Cortez CO 57.4
24 Fowler CO 57.2
25 Orchard City CO 56.9
26 Cedaredge CO 56.9
27 Rocky Ford CO 56.8
28 Pueblo West CO 56.7
29 Silt CO 56.7
30 New Castle CO 56.7
31 Ignacio CO 56.1
32 Leadville North CO 56.1
33 Leadville CO 56.1
34 Las Animas CO 56
35 La Junta CO 56
36 Penrose CO 55.9
37 Park Center CO 55.9
38 Lincoln Park CO 55.9
39 Florence CO 55.9
40 Cañon City CO 55.9
41 Northglenn CO 55.7
42 Brighton CO 55.7
43 Commerce City CO 55.7
44 Todd Creek CO 55.7
45 Hotchkiss CO 55.5
46 Paonia CO 55.5
47 Aetna Estates CO 55.4
48 Watkins CO 55.4
49 Twin Lakes CDP (Adams County) CO 55.4
50 Lafayette CO 55.4

Alamosa, CO tops the list with a composite score of 94.3 out of 100, followed by Center and Alamosa East. CO dominates the top 12 with 12 cities, reflecting strong performance across the weighted metrics for cleanest air.

Rankings combine 3 independent metrics: Clean Air, Sunshine, Low Rain. Cities are weighted to reflect what matters most to cleanest air, and any city missing one or more metrics is excluded to avoid artificially inflated rankings.

Explore Other Best Cities Rankings

Best Climate Cities
Warm temperatures, plenty of sunshine and clean air.
Sunniest Cities
Most days of sunshine per year, with warm and dry climate.
Most Urban Cities
Densely populated city centers with the largest urban footprints.