CityFunIndex

San Francisco, CA · the CityFunIndex

Air quality in San Francisco

San Francisco ranks #18 of 134 US cities for clean air, with a clean-air score of 87 — Exceptional. That puts it in the 87th percentile nationally and #4 of 18 in California.

clean-air score
87
Exceptional
National rank
#18 of 134
In California
#4 of 18
Percentile
87th

The typical city scores 50 for clean air; San Francisco sits 37 points above 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 San Francisco

  1. T#15 Lincoln, NE 89
  2. #17 Sacramento, CA 88
  3. #18 San Francisco, CA — this page 87
  4. T#19 Hilton Head Island, SC 86
  5. T#19 Savannah, GA 86

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 San Francisco

San Francisco scores 96 overall (Exceptional) on the CityFunIndex. Its strongest factors: