Air quality in USA
Air quality index (AQI⁺) and PM2.5 air pollution in USA • 18:44, Oct 02
California Air Resources Board (CARB)Oregon Department of Environmental QualityCoalition for Clean Air (CCA)LA Unified School DistrictWashington Department of EcologySouth Coast Air Quality Management District (South Coast AQMD)Spare the Air - Sacramento RegionColorado Department of Public Health & Environment (CDPHE)Bay Area Air Quality Management District (BAAQMD)San Diego County Air Pollution Control District (SDAPCD)Florida Department of Environmental Protection (Florida DEP)New York State Department of Environmental Conservation (NYSDEC) Lane Regional Air Protection Agency (LRAPA)North Carolina Department of Environmental Quality (NCDEQ)Maricopa County Air Monitoring DivisionIdaho Department of Environmental Quality (Idaho DEQ)Massachusetts Department of Environmental Protection (MassDEP)San Joaquin Valley Air Pollution Control DistrictTexas Commission on Environmental Quality (TCEQ)Minnesota Pollution Control Agency (MPCA)Hawaii State Department of HealthNew Jersey Department of Environmental Protection (NJDEP)Alligator FamilyMetropolitan Washington Council of Governments (MWCOG) anonymous UTOPIA FiberMKE FreshAir CollectiveBrainard Elementary SchoolRichjstuckerCastlebay Lane Elementary School037Travis ThompsonAnonymousTonydavid sirieixDavid PowerWilton Place ElementaryjunkVan Deene Avenue Elementary SchoolDutch BrosLoyola Village Fine and Performing Arts MagnetucweatherSouth Shores VAPA MagnetNPSJoe CernyLos Feliz STEMM MagnetVan Ness Avenue Elementary SchoolAllesandro Elementary SchoolLanai Road Elementary SchoolAnnandale Elementary SchoolValley View Elementary SchoolLenicia B. Weemes Elementary SchoolEagle Rock Elementary & Magnet Centerwyndham centerHancock Park Elementary SchoolOlympus Cove - UpperSODadGVJonathan RockwayImperial County Department of Toxic Substance and Comite Civico del ValleOakland Unified School DistrictClean Air PartnersAnonymousJustice Street Academy Charter SchoolWestport Heights ElementaryGrand View Boulevard ElementaryIQAir NACleanAIRE NC ActiveSGV - Active San Gabriel Valley Safer TogetherPractical Software, LLCSeattle Children’s HospitalUrban Soil/Tierra Urbanahillmead parkTenafly Nature CenterAdame Communications Inc.Woodland Park ZooBreathe Southern CaliforniaSteinach OfficebdavisEnoch HowellDHP Energy at Santa Cat’s 😼House🏡Preh IncBreitenbush Hot SpringsForward StrideTown Arms Apartments, Inc.StripeJoshua Kimzey - Dutch Bros CoffeeAir Aware Air Quality Project YMCAClean Air LAWeingart East LA YMCAArchitectural Medicine LLCSohail AbdiSIERRA CLUBOhio Valley Safe Air OVSAJesus MartinezScribe WinerySJVAirKindred MotorworksAnonymous JokerRividor EHSIQAir Clean Air Experience CenterView Ridge Swim & Tennis ClubMcCormick RanchTate MetcalfMemorial Regional HealthRogue Detection Teams Anonymous contributor
8 stations sponsored by The Foundation for Clean Air
California Air Resources Board (CARB)Oregon Department of Environmental QualityCoalition for Clean Air (CCA)LA Unified School DistrictWashington Department of EcologySouth Coast Air Quality Management District (South Coast AQMD)Spare the Air - Sacramento RegionColorado Department of Public Health & Environment (CDPHE)Bay Area Air Quality Management District (BAAQMD)San Diego County Air Pollution Control District (SDAPCD)Florida Department of Environmental Protection (Florida DEP)New York State Department of Environmental Conservation (NYSDEC) Lane Regional Air Protection Agency (LRAPA)North Carolina Department of Environmental Quality (NCDEQ)Maricopa County Air Monitoring DivisionIdaho Department of Environmental Quality (Idaho DEQ)Massachusetts Department of Environmental Protection (MassDEP)San Joaquin Valley Air Pollution Control DistrictTexas Commission on Environmental Quality (TCEQ)Minnesota Pollution Control Agency (MPCA)Hawaii State Department of HealthNew Jersey Department of Environmental Protection (NJDEP)Alligator FamilyMetropolitan Washington Council of Governments (MWCOG) anonymous UTOPIA FiberMKE FreshAir CollectiveBrainard Elementary SchoolRichjstuckerCastlebay Lane Elementary School037Travis ThompsonAnonymousTonydavid sirieixDavid PowerWilton Place ElementaryjunkVan Deene Avenue Elementary SchoolDutch BrosLoyola Village Fine and Performing Arts MagnetucweatherSouth Shores VAPA MagnetNPSJoe CernyLos Feliz STEMM MagnetVan Ness Avenue Elementary SchoolAllesandro Elementary SchoolLanai Road Elementary SchoolAnnandale Elementary SchoolValley View Elementary SchoolLenicia B. Weemes Elementary SchoolEagle Rock Elementary & Magnet Centerwyndham centerHancock Park Elementary SchoolOlympus Cove - UpperSODadGVJonathan RockwayImperial County Department of Toxic Substance and Comite Civico del ValleOakland Unified School DistrictClean Air PartnersAnonymousJustice Street Academy Charter SchoolWestport Heights ElementaryGrand View Boulevard ElementaryIQAir NACleanAIRE NC ActiveSGV - Active San Gabriel Valley Safer TogetherPractical Software, LLCSeattle Children’s HospitalUrban Soil/Tierra Urbanahillmead parkTenafly Nature CenterAdame Communications Inc.Woodland Park ZooBreathe Southern CaliforniaSteinach OfficebdavisEnoch HowellDHP Energy at Santa Cat’s 😼House🏡Preh IncBreitenbush Hot SpringsForward StrideTown Arms Apartments, Inc.StripeJoshua Kimzey - Dutch Bros CoffeeAir Aware Air Quality Project YMCAClean Air LAWeingart East LA YMCAArchitectural Medicine LLCSohail AbdiSIERRA CLUBOhio Valley Safe Air OVSAJesus MartinezScribe WinerySJVAirKindred MotorworksAnonymous JokerRividor EHSIQAir Clean Air Experience CenterView Ridge Swim & Tennis ClubMcCormick RanchTate MetcalfMemorial Regional HealthRogue Detection Teams Anonymous contributor
8 stations sponsored by The Foundation for Clean Air
Live most polluted city ranking
Real-time USA most polluted city ranking
| # | Cities | AQI⁺ US | |
|---|---|---|---|
| 1 |  New Canaan | 192 | |
| 2 | El Portal | 128 | |
| 3 | Bakersfield | 103 | |
| 4 | Compton | 103 | |
| 5 | New Haven | 102 | |
| 6 | Signal Hill | 101 | |
| 7 | Clovis | 98 | |
| 8 | Fresno County | 97 | |
| 9 | Madera | 93 | |
| 10 | New Castle County | 93 |
2025 USA most polluted city
| Cudahy, California | 61 |
Live cleanest city ranking
Real-time USA cleanest city ranking
| # | Cities | AQI⁺ US | |
|---|---|---|---|
| 1 | Keweenaw County | 1 | |
| 2 | Lawrence County | 1 | |
| 3 | Escambia | 3 | |
| 4 | Mexico | 3 | |
| 5 | Oconomowoc | 3 | |
| 6 | Susquehanna | 3 | |
| 7 | Archbald | 4 | |
| 8 | Beaumont | 4 | |
| 9 | Portland | 4 | |
| 10 | Sedona | 4 |
2025 USA cleanest city
| Lihue, Hawaii | 8 |
2025 USA air quality
2025 country air quality average
How polluted is USA?
In 2025 in USA, the annual PM2.5 concentration was 1.5 times the WHO annual PM2.5 guideline.
2025 AQI⁺ country ranking
Which country had the worst air quality in 2025?
Worldwide PM2.5 ranking
2025 USA global rank in air pollution
120/143
Wildfires in USA
Real-time information
Active fires
9
Learn more about global air quality
Which is the most polluted state in USA?
- Alabama
- Alaska
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- California
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- Delaware
- District of Columbia
- Florida
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- Guam
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- Idaho
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- Iowa
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- Louisiana
- Maine
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- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
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- Oregon
- Pennsylvania
- Rhode Island
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
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- Virginia
- Washington
- West Virginia
- Wisconsin
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