Philadelphia vs Erie Air Quality Comparison

Which city has cleaner air right now, from the latest EPA AirNow AQI

As of September 23, 2026, Erie, PA has cleaner air than Philadelphia, PA — AQI 21 (Good) vs 63 (Moderate), a gap of 42 AQI points in the latest EPA AirNow observations. Lower AQI means cleaner air. Philadelphia's reading is driven by PM2.5 and Erie's by O3.

Philadelphia, PA

Moderate

StatePennsylvania
Dominant PollutantPM2.5
CategoryModerate
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Erie, PA

Good

StatePennsylvania
Dominant PollutantO3
CategoryGood
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Summary

Erie has 42 points better air quality

Erie has an AQI of 21 compared to 63

Our Pick

Extra Protection for Philadelphia Homes

Air quality in Philadelphia is moderate (AQI 63), with fine particles (PM2.5) the main concern. A True-HEPA purifier gives sensitive groups — kids, seniors and anyone with asthma or allergies — cleaner air indoors on days like today.

Large Room4.6(8,000+ ratings)
Coway AP-1512HH Mighty
True HEPA + carbon · CADR ~246 CFM · rooms up to 361 sq ft
True HEPA + carbon, high CADR — clears PM2.5 from most rooms fast, our all-round pick
~$230
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Compare top-rated True-HEPA purifiers:

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 →
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 →
Budget Pick
Levoit Core 400S
True HEPA
True HEPA · CADR ~141 CFM · rooms up to 219 sq ft
~$1004.7
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

DayPhiladelphiaErieBetter
TodayAQI 38AQI 31Erie
Wed, Sep 23AQI 35AQI 32Erie
Thu, Sep 24AQI 37AQI 35Erie

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