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Air quality in California
Air quality index (AQI) and PM2.5 air pollution in California
LIVE AQI CITY RANKING
Real-time California
Most polluted city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Westwood | 124 |
| 2 | Paramount | 77 |
| 3 | Yosemite Np Turtleback Dome | 63 |
| 4 | Cathedral City | 61 |
| 5 | Baldwin Park | 59 |
| 6 | Palm Desert | 55 |
| 7 | Calipatria | 53 |
| 8 | La Jolla | 53 |
| 9 | Imperial | 48 |
| 10 | La Mesa | 42 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
5460 Contributors
See all
LIVE AQI CITY RANKING
Real-time California
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Graeagle | 0 |
| 2 | Janesville | 0 |
| 3 | Macdoel | 0 |
| 4 | Plumas | 0 |
| 5 | Port Hueneme | 0 |
| 6 | Rancho Murieta | 0 |
| 7 | Running Springs | 0 |
| 8 | Susanville | 0 |
| 9 | Tahoe Vista | 0 |
| 10 | Tulelake | 0 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
Good
Moderate
Unhealthy for sensitive groups
Unhealthy
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News
The latest air quality news and resources.
California air quality data attribution
5460Contributors
- California Air Resources Board (CARB)
225 stations
- Spare the Air - Sacramento Region
13 stations
USA National Park Service23 stations
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El Dorado County Air Quality Management District10 stations
Palo Alto OES1 station
19 Government Contributors
Coalition for Clean Air (CCA)247 stations
Climate First: Replacing Oil and Gas (CFROG)3 stations
- Safer Together San Francisco
1 station
4 Non-profit organization Contributors
- Oakland Unified School District
9 stations
- Coachella Valley Unified School District
9 stations
- El Centro Elementary School District
2 stations
- Ackerman Charter School District
1 station
Ravenswood City School District IOT2 stations
- West Contra Costa Unified School District
3 stations
Harvard-Westlake School3 stations
- Calexico Unified School District
2 stations
- Plaza Community Services La Roca Verde
1 station
- Los Angeles Unified School District
1 station
- nora caruso
1 station
- Rialto Unified School District
1 station
Grove Preschool2 stations
USC Environmental Health Centers1 station
14 Educational Contributors
Baldacci Family Vineyards1 station
Scribe Winery1 station
Forster Ranch1 station
IQAir Air Quality Science Team5 stations
- Stripe
1 station
5 Corporate Contributors
- Weledelzeergeleerde Heer
1 station
Pat Conway1 station
- Gustavo R. Guimarães
1 station
Aaron Solochek1 station
- Steve
9 stations
- Timothy Wilson
1 station
- -
1 station
- ddavies0001
2 stations
- IQAir community Member
1 station
- Nathan Pyle, MA
1 station
- justin bright
1 station
Hunter1 station
- Chuck Kissner
1 station
- Chris
1 station
- Alejandra Perez
1 station
- CK
1 station
- chris
1 station
- Ben
1 station
- Brent
1 station
- JT
1 station
- IQAir Community Member
1 station
- Charlie Leonard
1 station
- AC
1 station
Camille1 station
Nick Chapman1 station
- IQAir Community Member
1 station
- Jeremy
1 station
KellerG1 station
- IQAir Community Member
1 station
- Anonymous
1 station
janet fouts1 station
- dra
1 station
- Phong Nguyen
1 station
- WH57
1 station
- kevin
1 station
- Igor Solomennikov
1 station
- Anonymous
2 stations
- Mat Henley
1 station
BS2 stations
- tripleD
1 station
- IQAir PDR Member
1 station
- Dan P
1 station
- Travis Thompson
1 station
Lane@IQAir1 station
- Chandler Dunlap - Dutch Bros
2 stations
- Anonymous
1 station
- IQAir Community Member
1 station
- Jen & Jason Van Dinter
1 station
- Robert M
1 station
- A & O Aryal
1 station
Daniel Rich1 station
treemocker1 station
Mario Zaizar1 station
Friendly Neighbor1 station
- FlyGirl
1 station
- Lars
1 station
Hippopo1 station
- Hogwarts
1 station
- Stephen Schlie
1 station
- Shawn
1 station
- Brian Morton
1 station
- efeff
1 station
- Brian Goshorn
1 station
- Spongebob Airpants
1 station
- Anonymous
1 station
- Matt
1 station
- William
1 station
- A.Kuehlmann
1 station
ChemistChristi1 station
- Leslie Barnes
1 station
- Hugh Wimberly
1 station
Upavas1 station
- Max C
1 station
HGR barn1 station
anonymous1 station
Jim Minton1 station
- Ben
1 station
- JMA
1 station
- anonymoose
1 station
Jim Cornick1 station
- Michael Nielsen
1 station
- C.L.
1 station
Will Mason2 stations
- Meinrat Andreae
1 station
- nontexan
1 station
- Simon Walker
1 station
Anonymous1 station
chubert1 station
- Randy Steen
1 station
- Lorien
1 station
- Karl8704
1 station
- Wim Coekaerts
1 station
Darell1 station
AL1 station
Red Dog Ranch1 station
- Adam
1 station
- Jonathan Sorenson
1 station
- Mark Legassie
1 station
- Anonymous
1 station
- Michi Watchdog
1 station
- EJ
1 station
- Nicklas Johnson
1 station
- John Grossman
1 station
- KKastle IQ
1 station
- Erina Love
1 station
- Margot
1 station
- FamilyD
1 station
JGM1 station
Pacific View Air1 station
- GB
1 station
- Sasha
1 station
JC1 station
- Wikinaut
1 station
- Matt Newkirk
1 station
- russ
1 station
- chono
1 station
- msuttie
1 station
- rkjunior
1 station
J1 station
- Erik Bjorling
1 station
- Quail Mountain Lane
1 station
- Logan Bruns
1 station
- rbernabe
1 station
- KBT
1 station
- mjburns
1 station
- Anonymous
1 station
- quick.wood7910
1 station
- Patrick
1 station
- kelp
1 station
- GB
1 station
Neighborhood Brush Creek1 station
- IQAir Community Member
1 station
Brink1 station
Caspar1 station
Aaron Graf1 station
- Jack
1 station
- khowser10
1 station
- Integrity
1 station
- ucweather
1 station
Sanchez Way1 station
- Willow Glen - Sandra
1 station
- David
1 station
- variousplaces
1 station
- John Wright
1 station
- Robert Hawthorne
1 station
- Shrisha Radhakrishna
1 station
- Rana Rekhi
1 station
- Shearwater
1 station
- bearklaw
1 station
- Tom Bacus
1 station
- Sierra
1 station
- BJ
1 station
- eliotsensor
1 station
- Anonymous
1 station
- kpurvis
1 station
SP1 station
- David T
1 station
Rob Darby1 station
Tom Conrad1 station
- Chuck Tyler
1 station
- Chris Minick
1 station
- LHJB
1 station
- csm10495
1 station
- Steve Taubman
1 station
- Eric Sun
1 station
- Terrace 500
1 station
- Grid Man
1 station
- Gennady
1 station
- johnnygerman
1 station
michael price1 station
- Allen Hutchison
1 station
Stephen Franklin1 station
- E P
1 station
- alesl
1 station
- Jeff Kessler
1 station
- Jim Crawford
1 station
- JS
1 station
- Stan Watt
1 station
- David P. Balogh
1 station
179 Individual Contributors
5239 Anonymous contributors5239 stations
5239 Anonymous Contributors
13 Data sources
PurpleAir
Clarity Movement Co.- California Air Resources Board (CARB)
AirNow
IQAir- Spare the Air - Sacramento Region
- San Diego County Air Pollution Control District (SDAPCD)
Imperial County Department of Toxic Substance and Comite Civico del Valle- San Joaquin Valley Air Pollution Control District
- Bay Area Air Quality Management District (BAAQMD)
Imperial County Air Pollution Control District (ICAPCD)- USA National Park Service
Santa Barbara County Air Pollution Control District
Which is the most polluted city in California?
- Westwood 124
- Paramount 77
- Yosemite Np Turtleback Dome 63
- Cathedral City 61
- Baldwin Park 59
- Palm Desert 55
- Calipatria 53
- La Jolla 53
- Imperial 48
- La Mesa 42
- Camp Pendleton South 40
- Claremont 37
- Compton 37
- Dinuba 37
- Cypress 35
- North Hollywood 35
- Twentynine Palms 35
- Yucaipa 35
- Victorville 34
- Calexico 33
- El Segundo 33
- Mecca 33
- Newhall 33
- Palm Springs 33
- Rainbow 33
- Tehama 33
- Westmorland 33
- Yucca Valley 33
- Koreatown 32
- Pine Mountain Club 32
- Barstow 31
- Carson 31
- El Cajon 31
- McCloud 31
- Rancho Penasquitos 30
- Sherman Oaks 30
- Tujunga 30
- Willowbrook 30
- Corcoran 29
- Felton 29
- Gardena 29
- Hollywood 29
- Ladera Ranch 29
- Olympic Valley 29
- San Diego 29
- Studio City 29
- Aliso Viejo 28
- Alpine 28
- Bishop 28
- San Rafael 28
- Sequoia National Park 28
- Shadow Hills 28
- Boyle Heights 27
- Fort Jones 27
- Orange 27
- Paicines 27
- Redwood City 27
- Rio Linda 27
- Golden Hills 26
- Maywood 26
- Red Bluff 26
- Santa Barbara 26
- Banning 25
- Berkeley 25
- Fillmore 25
- Goleta 25
- Hacienda Heights 25
- Highland 25
- Hollister 25
- Huron 25
- Lomita 25
- Loyalton 25
- Maricopa 25
- Modesto 25
- Morro Bay 25
- Oak Hills 25
- Rancho Tehama Reserve 25
- Redding 25
- Rialto 25
- San Francisco 25
- San Pablo 25
- Shafter 25
- Shandon 25
- Trona 25
- Winchester 25
- Bakersfield 24
- Burney 24
- Glendora 24
- Marina del Rey 24
- Ontario 24
- Paso Robles 24
- Plumas Lake 24
- San Benito 24
- Tranquillity 24
- Vallejo 24
- Beverly Hills 23
- Biggs 23
- Blythe 23
- Hesperia 23
- Kernville 23
- Mariposa 23
- Quincy 23
- San Jose 23
- South Oroville 23
- Tracy 23
- Ventura 23
- Arvin 22
- Encino 22
- Hanford 22
- Huntington Park 22
- Indian Wells 22
- Jamestown 22
- La Habra 22
- Lake Elsinore 22
- Long Beach 22
- Lynwood 22
- Oakland 22
- Solano 22
- View Park-Windsor Hills 22
- Vista Santa Rosa 22
- Anza 21
- Bermuda Dunes 21
- Caspar 21
- Dirty Socks 21
- Glendale 21
- La Canada Flintridge 21
- Mesa Verde 21
- Oasis 21
- Rancho Mirage 21
- Rough and Ready 21
- San Gabriel 21
- Santa Ynez 21
- Signal Hill 21
- Thousand Palms 21
- Van Nuys 21
- Venice 21
- Yreka 21
- Clovis 20
- Desert Edge 20
- Desert Shores 20
- Garnet 20
- Glen Avon 20
- Madera 20
- Miramonte 20
- Old Fig Garden 20
- Orcutt 20
- Oxnard 20
- Redondo Beach 20
- Reseda 20
- San Marino 20
- Santa Maria 20
- Silver Lake 20
- Stockton 20
- Tahoe City 20
- Bass Lake 19
- Big River 19
- Brawley 19
- Desert Hot Springs 19
- Escalon 19
- Fresno 19
- Idyllwild 19
- Loma Linda 19
- Los Angeles 19
- Newman 19
- Rancho Cucamonga 19
- San Andreas 19
- San Bernardino 19
- San Fernando 19
- South Gate 19
- Bertsch-Oceanview 18
- Cabazon 18
- Canoga Park 18
- Chester 18
- Grass Valley 18
- Hayfork 18
- Imperial Beach 18
- Merced 18
- Niland 18
- Shasta Lake 18
- Silver Lakes 18
- Thousand Oaks 18
- Tuolumne 18
- Altadena 17
- Arcadia 17
- Chula Vista 17
- Culver City 17
- Davis 17
- Delano 17
- Fort Bragg 17
- Fruitridge Pocket 17
- Heber 17
- Holtville 17
- Indio 17
- La Crescenta-Montrose 17
- La Jolla Shores 17
- Lebec 17
- Mira Mesa 17
- Monrovia 17
- National City 17
- Oceano 17
- Olancha 17
- Pasadena 17
- Pinon Hills 17
- Porterville 17
- Rancho Palos Verdes 17
- San Clemente 17
- San Joaquin 17
- Simi Valley 17
- Sorrento Valley 17
- Valle Vista 17
- West Carson 17
- West Hollywood 17
- Willow Creek 17
- Willows 17
- Yuba City 17
- Aguanga 16
- Alturas 16
- Angels Camp 16
- Avocado Heights 16
- Beaumont 16
- Casa de Oro-Mount Helix 16
- Crestline 16
- Cudahy 16
- East Hemet 16
- East La Mirada 16
- El Cerrito Corona 16
- Elverta 16
- Fairbanks Ranch 16
- Folsom 16
- Fontana 16
- Garden Grove 16
- Green Acres 16
- Home Gardens 16
- Homeland 16
- La Presa 16
- La Puente 16
- Los Gatos 16
- Los Serranos 16
- March Air Force Base 16
- Mentone 16
- Norco 16
- Nuevo 16
- Placentia 16
- Pomona 16
- Riverside 16
- Rowland Heights 16
- Santa Monica 16
- Seeley 16
- Sierra Madre 16
- Sky Valley 16
- South San Jose Hills 16
- South Whittier 16
- Stanton 16
- Three Rivers 16
- Valinda 16
- Villa Park 16
- Walnut 16
- West Hills 16
- West Puente Valley 16
- Alondra Park 15
- Apple Valley 15
- Artesia 15
- Azusa 15
- Bayview 15
- Bell 15
- Bell Gardens 15
- Bellflower 15
- Bonita 15
- Bostonia 15
- Bradbury 15
- California City 15
- Castaic 15
- Cerritos 15
- Charter Oak 15
- Chino 15
- Citrus 15
- Commerce 15
- Covina 15
- Duarte 15
- East Los Angeles 15
- East Pasadena 15
- East Rancho Dominguez 15
- East San Gabriel 15
- Echo Park 15
- Encinitas 15
- Florence-Graham 15
- Foothill Ranch 15
- Fort Irwin 15
- Fountain Valley 15
- Good Hope 15
- Grand Terrace 15
- Hawaiian Gardens 15
- Hermosa Beach 15
- Hidden Meadows 15
- Highgrove 15
- Humboldt Hill 15
- Inglewood 15
- Irwindale 15
- Joshua Tree 15
- Jurupa Valley 15
- King City 15
- La Mirada 15
- La Palma 15
- Laguna Hills 15
- Lakeside 15
- Los Alamitos 15
- Mayflower Village 15
- Mead Valley 15
- Meadowbrook 15
- Menifee 15
- Midway City 15
- Montclair 15
- Montebello 15
- Muscoy 15
- Nipomo 15
- North El Monte 15
- Norwalk 15
- Pedley 15
- Pico Rivera 15
- Portola 15
- Portola Hills 15
- Quail Valley 15
- Rancho San Diego 15
- Rancho Santa Margarita 15
- Romoland 15
- Rossmoor 15
- Rubidoux 15
- San Antonio Heights 15
- San Dimas 15
- San Pasqual 15
- Santa Fe Springs 15
- South El Monte 15
- South San Gabriel 15
- Sun City 15
- Sunnyslope 15
- Temple City 15
- Torrance 15
- Val Verde 15
- Valencia 15
- Vincent 15
- Walnut Park 15
- West Athens 15
- West Rancho Dominguez 15
- West Whittier-Los Nietos 15
- Westlake Village 15
- Westminster 15
- Westmont 15
- Winter Gardens 15
- Woodcrest 15
- Bonsall 14
- Buena Park 14
- Cameron Park 14
- Camp Pendleton North 14
- Canyon Lake 14
- Century City 14
- China Lake Acres 14
- Chino Hills 14
- Coarsegold 14
- Coronado 14
- Coto De Caza 14
- Cutten 14
- Del Aire 14
- Escondido 14
- Eucalyptus Hills 14
- Ferndale 14
- Granite Hills 14
- Hawthorne 14
- Inyokern 14
- Jamul 14
- Ladera Heights 14
- Lakeland Village 14
- Lawndale 14
- Lennox 14
- Lucerne Valley 14
- Murrieta Hot Springs 14
- Myrtletown 14
- Ojai 14
- Pine Hills 14
- Ramona 14
- Ridgecrest 14
- Rio Vista 14
- Rolling Hills Estates 14
- Santa Clarita 14
- Sedco Hills 14
- Sunland 14
- Sutter 14
- Universal City 14
- Wildomar 14
- Woodland 14
- Woodland Hills 14
- Yosemite Valley 14
- Alhambra 13
- Big Bear City 13
- Bloomington 13
- Blue Lake 13
- Borrego Springs 13
- Broadmoor 13
- Campo 13
- Crest 13
- Diamond Bar 13
- Diamond Springs 13
- Elk Grove 13
- Fullerton 13
- Harbison Canyon 13
- Julian 13
- Lincoln 13
- Littlerock 13
- Manhattan Beach 13
- Monterey Park 13
- Palmdale 13
- Palos Verdes Estates 13
- Rolling Hills 13
- Rosamond 13
- Roseville 13
- Salton City 13
- San Diego Country Estates 13
- San Pedro 13
- Spring Valley 13
- Upland 13
- Wrightwood 13
- Yorba Linda 13
- Acton 12
- Adelanto 12
- Agua Dulce 12
- Big Bear Lake 12
- Bill Stanley 12
- Boron 12
- Carmel Valley Village 12
- Dana Point 12
- Del Mar 12
- Descanso 12
- Desert View Highlands 12
- Downey 12
- Edwards Air Force Base 12
- El Centro 12
- Green Valley 12
- Hemet 12
- Keeler 12
- Klamath 12
- Laguna Niguel 12
- Lake Arrowhead 12
- Lake Los Angeles 12
- Lancaster 12
- Leona Valley 12
- Lone Pine 12
- Mission Viejo 12
- Mountain View Acres 12
- North Edwards 12
- North Hills 12
- Northridge 12
- Pasatiempo 12
- Phelan 12
- Pine Valley 12
- Pioneer 12
- Sacramento 12
- Santa Ana 12
- Santee 12
- Seal Beach 12
- Searles Valley 12
- South Pasadena 12
- Spring Valley Lake 12
- Sun Village 12
- West Covina 12
- Alameda 11
- Alpaugh 11
- Antelope 11
- Atwater 11
- Barstow Heights 11
- Bodfish 11
- Capitola 11
- Carlsbad 11
- Carmichael 11
- Chatsworth 11
- Chico 11
- Colusa 11
- Cool 11
- Davenport 11
- Earlimart 11
- East Porterville 11
- El Monte 11
- Exeter 11
- Foothill Farms 11
- Hidden Hills 11
- La Verne 11
- Lakewood 11
- Las Flores 11
- Lathrop 11
- Lenwood 11
- Lompico 11
- McFarland 11
- Meadow Vista 11
- Mojave 11
- Mount Hermon 11
- Newport Beach 11
- North Highlands 11
- Oildale 11
- Opal Cliffs 11
- Orland 11
- Oroville East 11
- Pacheco 11
- Pacifica 11
- Patterson 11
- Pixley 11
- Poplar-Cotton Center 11
- Richgrove 11
- Rio Dell 11
- Rosemont 11
- Springville 11
- Stallion Springs 11
- Stevenson Ranch 11
- Summerland 11
- Taft 11
- Teviston 11
- Tipton 11
- Topanga 11
- Trabuco Canyon 11
- Tuolumne City 11
- Weldon 11
- Wheatland 11
- Whittier 11
- Woodville 11
- Agoura 10
- Arnold 10
- Auburn 10
- Big Pine 10
- Castroville 10
- Cayucos 10
- Citrus Heights 10
- Clay 10
- Collierville 10
- Colma 10
- Colton 10
- Corona 10
- Crescent City 10
- Dixon Lane-Meadow Creek 10
- Dogtown 10
- East Quincy 10
- El Granada 10
- Eureka 10
- Florin 10
- Gridley 10
- Herald 10
- Hydesville 10
- Idyllwild-Pine Cove 10
- Inyo 10
- Irvine 10
- Kelso 10
- Kirkwood 10
- La Habra Heights 10
- La Quinta 10
- Lamont 10
- Lindsay 10
- Lockeford 10
- Los Banos 10
- Malibu 10
- Mission Hills 10
- Morada 10
- Morongo Valley 10
- Murrieta 10
- North Tustin 10
- Parkway 10
- Pine Grove 10
- Piru 10
- Redwood Valley 10
- Santa Susana 10
- Seacliff 10
- Shasta 10
- Sheridan 10
- Strathmore 10
- Temecula 10
- Thermal 10
- Thornton 10
- Vandenberg Air Force Base 10
- Vineyard 10
- Weedpatch 10
- Willits 10
- Alum Rock 9
- Amesti 9
- Anderson 9
- Aptos Hills-Larkin Valley 9
- Armona 9
- August 9
- Bay Point 9
- Blackhawk 9
- Bodega Bay 9
- Boronda 9
- Buckhorn 9
- Burlingame 9
- Buttonwillow 9
- Calimesa 9
- Callender 9
- Cambrian Park 9
- Camp Nelson 9
- Casa Conejo 9
- Del Rey 9
- Denair 9
- Emeryville 9
- Empire 9
- Fair Oaks 9
- Farmersville 9
- Fowler 9
- Frazier Park 9
- Garden Acres 9
- Gasquet 9
- Goshen 9
- Greenacres 9
- Grover Beach 9
- Home Garden 9
- Interlaken 9
- Isla Vista 9
- Ivanhoe 9
- Jackson 9
- Kerman 9
- Kern 9
- Kettleman City 9
- Kingsburg 9
- Laguna Beach 9
- Lake Isabella 9
- Lake Wildwood 9
- Lakeview 9
- Las Lomas 9
- Laton 9
- Lemoore 9
- Lemoore Station 9
- London 9
- Lost Hills 9
- Matheny 9
- Minkler 9
- Moorpark 9
- Mountain House 9
- Murphys 9
- Needles 9
- Oakhurst 9
- Orange Cove 9
- Pajaro 9
- Palo Cedro 9
- Paradise 9
- Patterson Tract 9
- Phoenix Lake 9
- Redlands 9
- Redwood Shores 9
- Riverbank 9
- Rosedale 9
- San Jacinto 9
- San Joaquin Hills 9
- Santa Paula 9
- Selma 9
- Seven Trees 9
- Shingle Springs 9
- Shingletown 9
- Sonora 9
- Squaw Valley 9
- Stratford 9
- Strawberry 9
- Sunnyside 9
- Tarpey Village 9
- Terra Bella 9
- Valley Center 9
- Valley Springs 9
- Visitacion Valley 9
- Vista 9
- Walnut Grove 9
- Warner Springs 9
- Waterford 9
- West Menlo Park 9
- Wofford Heights 9
- Woodlake 9
- Anaheim 8
- Arroyo Grande 8
- Ashland 8
- Avenal 8
- Berry Creek 8
- Bethel Island 8
- Bonadelle Ranchos-Madera Ranchos 8
- Brentwood 8
- Bret Harte 8
- Bridgeport 8
- Bystrom 8
- Channel Islands Beach 8
- Cherryland 8
- Coachella 8
- Country Club 8
- Covelo 8
- Del Rio 8
- Delhi 8
- Discovery Bay 8
- Dixon 8
- Dunsmuir 8
- East Foothills 8
- East Palo Alto 8
- East Sonora 8
- El Dorado Hills 8
- El Rio 8
- Eldridge 8
- Fairview 8
- Fallbrook 8
- Fetters Hot Springs-Agua Caliente 8
- Freedom 8
- Fremont 8
- French Camp 8
- Gold River 8
- Gustine 8
- Hercules 8
- Hilmar-Irwin 8
- Hughson 8
- Ione 8
- Johnstonville 8
- June Lake 8
- Kennedy 8
- Keyes 8
- Knightsen 8
- La Riviera 8
- Lake Forest 8
- Lake of the Pines 8
- Le Grand 8
- Lewiston 8
- Lincoln Village 8
- Linda 8
- Livingston 8
- Lodi 8
- Los Alamos 8
- Mammoth Lakes 8
- Manteca 8
- Montecito 8
- Moreno Valley 8
- Mountain Ranch 8
- North Auburn 8
- North Richmond 8
- Oceanside 8
- Olivehurst 8
- Planada 8
- Pleasanton 8
- Poway 8
- Rancho Cordova 8
- Riverdale Park 8
- Rollingwood 8
- Salida 8
- Sanger 8
- Saranap 8
- Shackelford 8
- Sleepy Hollow 8
- South San Francisco 8
- South Yuba City 8
- Stanislaus 8
- Taft Mosswood 8
- Tehachapi 8
- Tierra Buena 8
- Union City 8
- Vine Hill 8
- Waldon 8
- West Modesto 8
- Winters 8
- Winton 8
- Agoura Hills 7
- Albany 7
- Alta Sierra 7
- Aromas 7
- Auberry 7
- Auburn Lake Trails 7
- Avalon 7
- Beale Air Force Base 7
- Bella Vista 7
- Biola 7
- Buena Vista 7
- Calabasas 7
- Camarillo 7
- Carmel-by-the-Sea 7
- Carpinteria 7
- Caruthers 7
- Cedar Ridge 7
- Chualar 7
- Coalinga 7
- Coleville 7
- Contra Costa Centre 7
- Costa Mesa 7
- Cutler 7
- Del Monte Forest 7
- Del Rey Oaks 7
- East Oakdale 7
- Easton 7
- El Dorado 7
- El Sobrante 7
- Esparto 7
- Fairmead 7
- Ford City 7
- Foresthill 7
- Foster City 7
- Gonzales 7
- Half Moon Bay 7
- Hayward 7
- Highlands-Baywood Park 7
- Hillsborough 7
- Hume 7
- Huntington Beach 7
- Lake Nacimiento 7
- Lakehead-Lakeshore 7
- Linden 7
- Loma Rica 7
- Lompoc 7
- Loomis 7
- Lucerne 7
- Madera Acres 7
- Marina 7
- Meiners Oaks 7
- Middletown 7
- Mira Monte 7
- Montague 7
- Montalvin 7
- Monterey 7
- Monument Hills 7
- Newark 7
- North Fair Oaks 7
- North Fork 7
- Oakley 7
- Parksdale 7
- Parkwood 7
- Perris 7
- Pinole 7
- Pleasant Hill 7
- Red Corral 7
- Redway 7
- Rocklin 7
- Ross 7
- San Leandro 7
- San Ramon 7
- Santa Clara 7
- Saticoy 7
- Sisquoc 7
- Soulsbyville 7
- South Taft 7
- Sunnyvale 7
- Taft Heights 7
- Tara Hills 7
- Thermalito 7
- Toro Canyon 7
- Tustin 7
- Twin Lakes 7
- West Park 7
- Westhaven-Moonstone 7
- Woodacre 7
- Antioch 6
- Arcata 6
- Belmont 6
- Ben Lomond 6
- Butte 6
- Camino 6
- Camp Meeker 6
- Castro Valley 6
- Cherry Valley 6
- Chowchilla 6
- Concord 6
- Cupertino 6
- Daly City 6
- Danville 6
- Deer Park 6
- Dos Palos 6
- Dublin 6
- Dunnigan 6
- Eastvale 6
- Forest Meadows 6
- Forest Ranch 6
- Forestville 6
- Fortuna 6
- Gilroy 6
- Guerneville 6
- Happy Camp 6
- Hartley 6
- Hoopa 6
- Kensington 6
- Kentfield 6
- La Grange 6
- Ladera 6
- Larkspur 6
- Livermore 6
- Los Olivos 6
- Lucas Valley-Marinwood 6
- Magalia 6
- McKinleyville 6
- Mendota 6
- Millbrae 6
- Milpitas 6
- Montara 6
- Morgan Hill 6
- Mountain View 6
- Nevada City 6
- Noe Valley 6
- Oak Park 6
- Oak View 6
- Orosi 6
- Pacific Grove 6
- Palo Alto 6
- Point Arena 6
- Prather 6
- Prunedale 6
- Rancho Santa Fe 6
- Reedley 6
- Richmond 6
- Ridgemark 6
- Riverdale 6
- Saint Helena 6
- Salinas 6
- San Anselmo 6
- San Bruno 6
- San Carlos 6
- San Juan Capistrano 6
- San Mateo 6
- Santa Cruz 6
- Santa Venetia 6
- Solana Beach 6
- South Dos Palos 6
- South Lake Tahoe 6
- Sunnyside-Tahoe City 6
- Sutter Creek 6
- Turlock 6
- Allendale 5
- Amador 5
- Aptos 5
- Arbuckle 5
- Arden-Arcade 5
- Atascadero 5
- Bayside 5
- Belvedere 5
- Benicia 5
- Black Point-Green Point 5
- Boulder Creek 5
- Brisbane 5
- Calaveras 5
- Campbell 5
- Carmel Valley 5
- Corralitos 5
- Corte Madera 5
- Cottonwood 5
- El Cerrito 5
- El Verano 5
- Elkhorn 5
- Fairfax 5
- Firebaugh 5
- Greenfield 5
- Guadalupe 5
- Gualala 5
- Hidden Valley Lake 5
- Humboldt 5
- Lafayette 5
- Lemon Grove 5
- Live Oak 5
- Los Altos 5
- Loyola 5
- Martinez 5
- Marysville 5
- Mendocino 5
- Menlo Park 5
- Moraga 5
- Mount Shasta 5
- Napa 5
- Novato 5
- Orinda 5
- Pismo Beach 5
- Placerville 5
- Pollock Pines 5
- Portola Valley 5
- Rodeo 5
- Rohnert Park 5
- San Juan Bautista 5
- San Luis Obispo 5
- San Martin 5
- Santa Rosa 5
- Sausalito 5
- Scotia 5
- Scotts Valley 5
- Seaside 5
- Solvang 5
- Soquel 5
- Tamalpais-Homestead Valley 5
- Tiburon 5
- Truckee 5
- Tulare 5
- Ukiah 5
- Vacaville 5
- Visalia 5
- Walnut Creek 5
- Wasco 5
- Weaverville 5
- West Sacramento 5
- Windsor 5
- Yolo 5
- Ahwahnee 4
- Alamo 4
- Atherton 4
- Boyes Hot Springs 4
- Brooktrails 4
- Buellton 4
- Calistoga 4
- Central Valley (historical) 4
- Clayton 4
- Clear Lake Riviera 4
- Clearlake Oaks 4
- Cloverdale 4
- Copperopolis 4
- Durham 4
- East Richmond Heights 4
- Fairfield 4
- Galt 4
- Gerber 4
- Granite Bay 4
- Graton 4
- Hamilton City 4
- Healdsburg 4
- Hornbrook 4
- Kenwood 4
- Lagunitas-Forest Knolls 4
- Lakeport 4
- Larkfield-Wikiup 4
- Los Altos Hills 4
- Maxwell 4
- Midpines 4
- Mill Valley 4
- Mission District 4
- Monte Rio 4
- Monte Sereno 4
- Moss Beach 4
- Newcastle 4
- Nice 4
- Oakdale 4
- Orangevale 4
- Parlier 4
- Petaluma 4
- Piedmont 4
- Pittsburg 4
- Plymouth 4
- Rio Del Mar 4
- Ripon 4
- Roseland 4
- San Lorenzo 4
- Santa Margarita 4
- Sea Ranch 4
- Siskiyou 4
- Soda Bay 4
- Sonoma 4
- Stanford 4
- Stonyford 4
- Tahoma 4
- Trinity 4
- Upper Lake 4
- West Bishop 4
- Williams 4
- Woodbridge 4
- Yuba 4
- American Canyon 3
- Angwin 3
- Bear Valley Springs 3
- Burbank 3
- Cambria 3
- Ceres 3
- Cobb 3
- Colfax 3
- Cotati 3
- Crockett 3
- Day Valley 3
- Emerald Lake Hills 3
- Georgetown 3
- Glenn 3
- Inverness 3
- Kelseyville 3
- La Selva Beach 3
- Los Molinos 3
- Los Osos 3
- Mission Canyon 3
- Mono Vista 3
- Orleans 3
- Penn Valley 3
- Penngrove 3
- Rancho Calaveras 3
- San Marcos 3
- Saratoga 3
- Sebastopol 3
- Suisun 3
- Talmage 3
- Temelec 3
- Twain Harte 3
- Vandenberg Village 3
- Weed 3
- Woodside 3
- Bolinas 2
- Bonny Doon 2
- Brea 2
- Brookdale 2
- Carnelian Bay 2
- Columbia 2
- Corning 2
- Diablo 2
- Downieville 2
- Greenville 2
- Laytonville 2
- Lee Vining 2
- Lexington Hills 2
- Lower Lake 2
- Marin 2
- Marin City 2
- Nashville 2
- Occidental 2
- Oroville 2
- Placer 2
- Potter Valley 2
- San Miguel 2
- Shaver Lake 2
- Yosemite Lakes 2
- Yountville 2
- Acalanes Ridge 1
- Avila Beach 1
- Boonville 1
- Byron 1
- Challenge-Brownsville 1
- Clearlake 1
- Cuyama 1
- Dollar Point 1
- Kings Beach 1
- Laguna Woods 1
- Lake San Marcos 1
- Mono 1
- Nevada County 1
- North Lakeport 1
- Palermo 1
- Quartz Hill 1
- Rosemead 1
- Sierra 1
- Soledad 1
- Tamalpais Valley 1
- Templeton 1
- Watsonville 1
- Wilton 1
- Graeagle 0
- Janesville 0
- Laguna 0
- Macdoel 0
- Plumas 0
- Port Hueneme 0
- Rancho Murieta 0
- Running Springs 0
- Susanville 0
- Tahoe Vista 0
- Tulelake 0
AQI US, Metric