Air quality in USA
Air quality index (AQI⁺) and PM2.5 air pollution in USA • 14:22, Nov 15
California Air Resources Board (CARB)Coalition for Clean Air (CCA)Oregon Department of Environmental QualityLA Unified School DistrictWashington Department of EcologyBay Area Air Quality Management District (BAAQMD)San Diego County Air Pollution Control District (SDAPCD)South Coast Air Quality Management District (South Coast AQMD)Spare the Air - Sacramento RegionColorado Department of Public Health & Environment (CDPHE)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 DivisionMassachusetts Department of Environmental Protection (MassDEP)San Joaquin Valley Air Pollution Control DistrictIdaho Department of Environmental Quality (Idaho DEQ)Texas Commission on Environmental Quality (TCEQ)Clark County Department of Environment and SustainabilityMinnesota Pollution Control Agency (MPCA)Michigan Department of Environment, Great Lakes, and Energy (EGLE)Alligator FamilyMetropolitan Washington Council of Governments (MWCOG) anonymous UTOPIA FiberMKE FreshAir CollectiveBrainard Elementary SchoolRichjstuckerCastlebay Lane Elementary School037Travis ThompsonTonyAnonymousDavid Powerdavid sirieixWilton Place ElementaryjunkVan Deene Avenue Elementary SchoolDutch BrosucweatherSouth Shores VAPA MagnetJoe 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 - UpperSODadJonathan RockwayGVAnonymousClean Air PartnersJustice Street Academy Charter SchoolAnonymous Grand View Boulevard ElementaryWestport Heights ElementaryPlaya Del Rey Elementary SchoolLogan Academy of Global EcologyIQAir NAImperial County Department of Toxic Substance and Comite Civico del ValleCleanAIRE 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 CaliforniaClimate First: Replacing Oil and Gas (CFROG)bdavisSteinach OfficeEnoch HowellDHP Energy at Santa Cat’s 😼House🏡Preh IncForward StrideStripeTown Arms Apartments, Inc.Joshua Kimzey - Dutch Bros CoffeeClean Air LAArchitectural Medicine LLCSohail AbdiSIERRA CLUBCorona-Norco Family YMCAILD HPJesus MartinezSJVAirScribe WineryKindred MotorworksAnonymous JokerMcCormick RanchRividor EHSHyperbaric Oxygen Clinic of IdahoIQAir Clean Air Experience CenterView Ridge Swim & Tennis ClubThe MatherSBFAquaticsMemorial Regional HealthAnonymous contributor
9 stations sponsored by The Foundation for Clean Air
California Air Resources Board (CARB)Coalition for Clean Air (CCA)Oregon Department of Environmental QualityLA Unified School DistrictWashington Department of EcologyBay Area Air Quality Management District (BAAQMD)San Diego County Air Pollution Control District (SDAPCD)South Coast Air Quality Management District (South Coast AQMD)Spare the Air - Sacramento RegionColorado Department of Public Health & Environment (CDPHE)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 DivisionMassachusetts Department of Environmental Protection (MassDEP)San Joaquin Valley Air Pollution Control DistrictIdaho Department of Environmental Quality (Idaho DEQ)Texas Commission on Environmental Quality (TCEQ)Clark County Department of Environment and SustainabilityMinnesota Pollution Control Agency (MPCA)Michigan Department of Environment, Great Lakes, and Energy (EGLE)Alligator FamilyMetropolitan Washington Council of Governments (MWCOG) anonymous UTOPIA FiberMKE FreshAir CollectiveBrainard Elementary SchoolRichjstuckerCastlebay Lane Elementary School037Travis ThompsonTonyAnonymousDavid Powerdavid sirieixWilton Place ElementaryjunkVan Deene Avenue Elementary SchoolDutch BrosucweatherSouth Shores VAPA MagnetJoe 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 - UpperSODadJonathan RockwayGVAnonymousClean Air PartnersJustice Street Academy Charter SchoolAnonymous Grand View Boulevard ElementaryWestport Heights ElementaryPlaya Del Rey Elementary SchoolLogan Academy of Global EcologyIQAir NAImperial County Department of Toxic Substance and Comite Civico del ValleCleanAIRE 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 CaliforniaClimate First: Replacing Oil and Gas (CFROG)bdavisSteinach OfficeEnoch HowellDHP Energy at Santa Cat’s 😼House🏡Preh IncForward StrideStripeTown Arms Apartments, Inc.Joshua Kimzey - Dutch Bros CoffeeClean Air LAArchitectural Medicine LLCSohail AbdiSIERRA CLUBCorona-Norco Family YMCAILD HPJesus MartinezSJVAirScribe WineryKindred MotorworksAnonymous JokerMcCormick RanchRividor EHSHyperbaric Oxygen Clinic of IdahoIQAir Clean Air Experience CenterView Ridge Swim & Tennis ClubThe MatherSBFAquaticsMemorial Regional HealthAnonymous contributor
9 stations sponsored by The Foundation for Clean Air
Live most polluted city ranking
Real-time USA most polluted city ranking
| # | Cities | AQI⁺ US | |
|---|---|---|---|
| 1 |  Armstrong | 129 | |
| 2 | Broomfield | 94 | |
| 3 | Westminster | 94 | |
| 4 | Thornton | 91 | |
| 5 | Glendale, Arapahoe County | 85 | |
| 6 | Arvada | 80 | |
| 7 | Louisville | 80 | |
| 8 | Boulder | 77 | |
| 9 | Boulder County | 76 | |
| 10 | El Portal | 73 |
2025 USA most polluted city
| Cudahy, California | 61 |
Live cleanest city ranking
Real-time USA cleanest city ranking
| # | Cities | AQI⁺ US | |
|---|---|---|---|
| 1 | Bryson City | 1 | |
| 2 | Clairton | 1 | |
| 3 | Auburn | 2 | |
| 4 | Bonney Lake | 2 | |
| 5 | Cotati | 2 | |
| 6 | Emeryville | 2 | |
| 7 | Martha Lake | 2 | |
| 8 | Vashon | 2 | |
| 9 | Waimea, Hawaii County | 2 | |
| 10 | Akron | 3 |
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
4
Learn more about global air quality
Which is the most polluted state in USA?
- Alabama
- Alaska
- Arizona
- Arkansas
- California
- Colorado
- Connecticut
- Delaware
- District of Columbia
- Florida
- Georgia
- Guam
- Hawaii
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Mississippi
- Missouri
- Montana
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- Rhode Island
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
- Vermont
- Virginia
- Washington
- West Virginia
- Wisconsin
- Wyoming
