CityFunIndex

Boulder, CO · the CityFunIndex

Air quality in Boulder

Boulder ranks T#120 of 134 US cities for clean air, with a clean-air score of 12 — Quiet. That puts it in the 11th percentile nationally and T#4 of 6 in Colorado.

clean-air score
12
Quiet
National rank
T#120 of 134
In Colorado
T#4 of 6
Percentile
11th

The typical city scores 50 for clean air; Boulder sits 38 points below the median.

How air quality is measured

Recent particulate matter and ozone levels — a trailing-week air-quality average.

The clean-air score is the flip side of our air quality measure — 100 minus the raw air quality score — so a city with less of it scores higher.

Data sources: EPA AirNow and OpenAQ pollution readings (seven-day trailing average).

Full methodology → Glossary The raw measurement is part of the Data plan →

Ranked around Boulder

  1. T#116 Saint Paul, MN 14
  2. #119 Tucson, AZ 13
  3. T#120 Boulder, CO — this page 12
  4. T#123 Detroit, MI 11
  5. T#123 Henderson, NV 11

See the full leaderboard — Cities with the cleanest air →

Top US cities for clean air

  1. #1 Anchorage, AK 100
  2. #2 Bend, OR 99
  3. T#3 Lubbock, TX 98
  4. T#3 Telluride, CO 98
  5. #5 Montgomery, AL 97

More about Boulder

Boulder scores 77 overall (Very Fun) on the CityFunIndex. Its strongest factors: