Seattle vs Tacoma Air Quality Comparison
Which city has cleaner air right now, from the latest EPA AirNow AQI
As of September 23, 2026, Tacoma, WA has cleaner air than Seattle, WA — AQI 13 (Good) vs 48 (Good), a gap of 35 AQI points in the latest EPA AirNow observations. Lower AQI means cleaner air. Seattle's reading is driven by PM2.5 and Tacoma's by PM2.5.
Seattle, WA
Good
Tacoma, WA
Good
Summary
Tacoma has 35 points better air quality
Tacoma has an AQI of 13 compared to 48
Our Pick
Improve Indoor Air Quality
Even with good outdoor air in Seattle, indoor PM2.5, dust and allergens build up. A True-HEPA purifier keeps a bedroom or office consistently clean.
Budget Pick4.7(74,000+ ratings)
Levoit Core 400S
True HEPA · CADR ~141 CFM · rooms up to 219 sq ft
Best value True-HEPA for everyday allergens, dust and dander
Compare top-rated True-HEPA purifiers:
Budget Pick
Levoit Core 400S
True HEPA
True HEPA · CADR ~141 CFM · rooms up to 219 sq ft
~$1004.7
Check Price on Amazon →Editor's Pick
Levoit Vital 200S
True HEPA
True HEPA · washable pre-filter · rooms up to 1,875 sq ft
~$2004.6
Check Price on Amazon →Large Room
Coway AP-1512HH Mighty
HEPA + Carbon
True HEPA + carbon · CADR ~246 CFM · rooms up to 361 sq ft
~$2304.6
Check Price on Amazon →Prices are approximate and subject to change. As an Amazon Associate, we earn from qualifying purchases at no extra cost to you.
5-Day Forecast Comparison
| Day | Seattle | Tacoma | Better |
|---|---|---|---|
| Today | AQI 39 | AQI 39 | Tie |
| Wed, Sep 23 | AQI 28 | AQI 28 | Tie |
| Thu, Sep 24 | AQI 28 | AQI 28 | Tie |