Air quality in USA
Air quality index (AQI⁺) and PM2.5 air pollution in USA • 17:31, Oct 23
California Air Resources Board (CARB)Oregon Department of Environmental QualityCoalition for Clean Air (CCA)LA 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)Lane Regional Air Protection Agency (LRAPA)New York State Department of Environmental Conservation (NYSDEC) North Carolina Department of Environmental Quality (NCDEQ)Maricopa County Air Monitoring DivisionMassachusetts Department of Environmental Protection (MassDEP)Idaho Department of Environmental Quality (Idaho DEQ)San Joaquin Valley Air Pollution Control DistrictTexas Commission on Environmental Quality (TCEQ)Clark County Department of Environment and SustainabilityMinnesota Pollution Control Agency (MPCA)New Jersey Department of Environmental Protection (NJDEP)Alligator FamilyMetropolitan Washington Council of Governments (MWCOG) anonymous MKE FreshAir CollectiveBrainard Elementary SchoolRichjstuckerCastlebay Lane Elementary School037Travis ThompsonTonyAnonymousDavid Powerdavid sirieixWilton Place ElementaryjunkVan Deene Avenue Elementary SchoolDutch BrosLoyola Village Fine and Performing Arts MagnetucweatherSouth Shores VAPA MagnetNPSJoe CernyLos Feliz STEMM MagnetUTOPIA FiberVan 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 RockwayOakland Unified School DistrictSam BelliveauClean Air PartnersJustice Street Academy Charter SchoolGrand View Boulevard ElementaryWestport Heights ElementaryImperial County Department of Toxic Substance and Comite Civico del ValleIQAir NACleanAIRE NCSafer TogetherPractical Software, LLCSeattle Children’s HospitalUrban Soil/Tierra Urbanahillmead parkTenafly Nature CenterAdame Communications Inc.Woodland Park ZooClimate First: Replacing Oil and Gas (CFROG)Breathe Southern CaliforniabdavisSteinach OfficeEnoch HowellDHP Energy at Santa Cat’s 😼House🏡Preh IncBreitenbush Hot SpringsForward StrideStripeTown Arms Apartments, Inc.Joshua Kimzey - Dutch Bros CoffeeClean Air LAArchitectural Medicine LLCSohail AbdiSIERRA CLUBJesus MartinezOhio Valley Safe Air OVSAMKE FreshAir CollectiveSJVAirLauren PatrowskyScribe WineryKindred MotorworksAnonymous JokerRividor EHSMcCormick RanchIQAir Clean Air Experience CenterView Ridge Swim & Tennis ClubSBFAquaticsTate MetcalfMemorial Regional HealthHyperbaric Oxygen Clinic of IdahoAnonymous 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 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)Lane Regional Air Protection Agency (LRAPA)New York State Department of Environmental Conservation (NYSDEC) North Carolina Department of Environmental Quality (NCDEQ)Maricopa County Air Monitoring DivisionMassachusetts Department of Environmental Protection (MassDEP)Idaho Department of Environmental Quality (Idaho DEQ)San Joaquin Valley Air Pollution Control DistrictTexas Commission on Environmental Quality (TCEQ)Clark County Department of Environment and SustainabilityMinnesota Pollution Control Agency (MPCA)New Jersey Department of Environmental Protection (NJDEP)Alligator FamilyMetropolitan Washington Council of Governments (MWCOG) anonymous MKE FreshAir CollectiveBrainard Elementary SchoolRichjstuckerCastlebay Lane Elementary School037Travis ThompsonTonyAnonymousDavid Powerdavid sirieixWilton Place ElementaryjunkVan Deene Avenue Elementary SchoolDutch BrosLoyola Village Fine and Performing Arts MagnetucweatherSouth Shores VAPA MagnetNPSJoe CernyLos Feliz STEMM MagnetUTOPIA FiberVan 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 RockwayOakland Unified School DistrictSam BelliveauClean Air PartnersJustice Street Academy Charter SchoolGrand View Boulevard ElementaryWestport Heights ElementaryImperial County Department of Toxic Substance and Comite Civico del ValleIQAir NACleanAIRE NCSafer TogetherPractical Software, LLCSeattle Children’s HospitalUrban Soil/Tierra Urbanahillmead parkTenafly Nature CenterAdame Communications Inc.Woodland Park ZooClimate First: Replacing Oil and Gas (CFROG)Breathe Southern CaliforniabdavisSteinach OfficeEnoch HowellDHP Energy at Santa Cat’s 😼House🏡Preh IncBreitenbush Hot SpringsForward StrideStripeTown Arms Apartments, Inc.Joshua Kimzey - Dutch Bros CoffeeClean Air LAArchitectural Medicine LLCSohail AbdiSIERRA CLUBJesus MartinezOhio Valley Safe Air OVSAMKE FreshAir CollectiveSJVAirLauren PatrowskyScribe WineryKindred MotorworksAnonymous JokerRividor EHSMcCormick RanchIQAir Clean Air Experience CenterView Ridge Swim & Tennis ClubSBFAquaticsTate MetcalfMemorial Regional HealthHyperbaric Oxygen Clinic of IdahoAnonymous 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 |  Channelview | 109 | |
| 2 | Harris | 106 | |
| 3 | Houston | 106 | |
| 4 | Galveston | 102 | |
| 5 | Travis County | 102 | |
| 6 | Bexar County | 101 | |
| 7 | Memphis | 98 | |
| 8 | Austin | 95 | |
| 9 | Champaign | 95 | |
| 10 | Pixley | 95 |
2025 USA most polluted city
| Cudahy, California | 61 |
Live cleanest city ranking
Real-time USA cleanest city ranking
| # | Cities | AQI⁺ US | |
|---|---|---|---|
| 1 | Gallatin County | 2 | |
| 2 | Missoula County | 2 | |
| 3 | Liberty Lake | 3 | |
| 4 | Farmers Loop | 4 | |
| 5 | Makawao | 4 | |
| 6 | Hamilton | 5 | |
| 7 | Helena | 5 | |
| 8 | Aliso Viejo | 6 | |
| 9 | Big Sky | 6 | |
| 10 | Brawley | 6 |
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
