Air Quality by State

Browse comprehensive air quality data for all 51 US states and territories. Each state page provides detailed city-by-city AQI information, regional air quality patterns, and health recommendations based on official EPA data.

51
States Covered
145
Cities Monitored
34
Avg National AQI
Our Pick

Extra Protection for Texas Homes

Air quality in Texas 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

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.

Live in one of the higher-pollution states above? Don’t guess at purifier specs — our free CADR calculator sizes the right True-HEPA unit to your exact room in seconds.Find your purifier size →

All States

Alabama

AQI 44
2 citiesAvg: Good

Alaska

AQI 29
1 cityAvg: Good

Arizona

AQI 43
4 citiesAvg: Good

Arkansas

AQI 39
1 cityAvg: Good

California

AQI 57
15 citiesAvg: Moderate

Colorado

AQI 46
4 citiesAvg: Good

Connecticut

AQI 27
2 citiesAvg: Good

Delaware

AQI 23
1 cityAvg: Good

District of Columbia

AQI 25
1 cityAvg: Good

Florida

AQI 36
10 citiesAvg: Good

Georgia

AQI 36
4 citiesAvg: Good

Hawaii

AQI 31
1 cityAvg: Good

Idaho

AQI 32
1 cityAvg: Good

Illinois

AQI 28
5 citiesAvg: Good

Indiana

AQI 24
2 citiesAvg: Good

Iowa

AQI 36
1 cityAvg: Good

Kansas

AQI 38
1 cityAvg: Good

Kentucky

AQI 29
2 citiesAvg: Good

Louisiana

AQI 54
2 citiesAvg: Moderate

Maine

AQI 23
1 cityAvg: Good

Maryland

AQI 23
1 cityAvg: Good

Massachusetts

AQI 32
4 citiesAvg: Good

Michigan

AQI 45
5 citiesAvg: Good

Minnesota

AQI 32
2 citiesAvg: Good

Mississippi

AQI 48
1 cityAvg: Good

Missouri

AQI 31
2 citiesAvg: Good

Montana

AQI 26
1 cityAvg: Good

Nebraska

AQI 15
2 citiesAvg: Good

Nevada

AQI 50
2 citiesAvg: Good

New Hampshire

AQI 24
1 cityAvg: Good

New Jersey

AQI 37
4 citiesAvg: Good

New Mexico

AQI 32
2 citiesAvg: Good

New York

AQI 28
6 citiesAvg: Good

North Carolina

AQI 22
5 citiesAvg: Good

North Dakota

No data
0 citiesAwaiting AirNow data

Ohio

AQI 30
6 citiesAvg: Good

Oklahoma

AQI 52
2 citiesAvg: Moderate

Oregon

AQI 52
1 cityAvg: Moderate

Pennsylvania

AQI 33
6 citiesAvg: Good

Rhode Island

AQI 26
1 cityAvg: Good

South Carolina

AQI 31
2 citiesAvg: Good

South Dakota

AQI 28
1 cityAvg: Good

Tennessee

AQI 40
3 citiesAvg: Good

Texas

AQI 63
11 citiesAvg: Moderate

Utah

AQI 43
1 cityAvg: Good

Vermont

AQI 22
1 cityAvg: Good

Virginia

AQI 43
3 citiesAvg: Good

Washington

AQI 35
4 citiesAvg: Good

West Virginia

AQI 18
1 cityAvg: Good

Wisconsin

AQI 31
2 citiesAvg: Good

Wyoming

AQI 32
1 cityAvg: Good

Understanding State Air Quality Data

Air quality varies significantly across different states due to a combination of geographic, climatic, economic, and demographic factors. Understanding these variations helps you make informed decisions about outdoor activities, travel, and relocation.

Factors Affecting State Air Quality

  • Population density: More people typically means more vehicle emissions and energy consumption
  • Industrial activity: Manufacturing, power generation, and mining contribute to local pollution
  • Geography: Valleys and basins can trap pollution, while coastal areas often have cleaner air
  • Climate: Hot, sunny weather increases ozone formation; temperature inversions trap pollutants
  • Wildfire risk: Western states face seasonal smoke impacts from wildfires

How to Use This Data

  • Click any state to see detailed city-level air quality data
  • Compare states when planning relocation or extended travel
  • State averages represent typical conditions; check specific cities for detailed data
  • Consider seasonal variations when comparing long-term air quality

The average AQI shown for each state is calculated from all monitored cities within that state. Air quality can vary significantly within a state, so we recommend checking individual city pages for the most accurate local information.

Official EPA Data

All air quality data comes directly from the EPA's official monitoring network.

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