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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 |  Patterson | 122 |
| 2 | Westmorland | 95 |
| 3 | Newman | 86 |
| 4 | Huron | 83 |
| 5 | Oceano | 71 |
| 6 | King City | 69 |
| 7 | Crestline | 65 |
| 8 | Glendora | 64 |
| 9 | Indio | 64 |
| 10 | La Crescenta-Montrose | 64 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
5559 Contributors
See all
LIVE AQI CITY RANKING
Real-time California
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Capitola | 5 |
| 2 | Corcoran | 5 |
| 3 | Manhattan Beach | 6 |
| 4 | Laguna Woods | 7 |
| 5 | Port Hueneme | 7 |
| 6 | Point Arena | 8 |
| 7 | Bonny Doon | 9 |
| 8 | Temecula | 9 |
| 9 | Crescent City | 10 |
| 10 | Gualala | 11 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
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Moderate
Unhealthy for sensitive groups
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The latest air quality news and resources.
California air quality data attribution
5559Contributors
- California Air Resources Board (CARB)
228 stations
- Spare the Air - Sacramento Region
12 stations
USA National Park Service25 stations
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El Dorado County Air Quality Management District11 stations
Palo Alto OES1 station
SLO County Air Pollution Control District2 stations
19 Government Contributors
Coalition for Clean Air (CCA)243 stations
Climate First: Replacing Oil and Gas (CFROG)2 stations
ActiveSGV - Active San Gabriel Valley1 station
- Safer Together San Francisco
1 station
5 Non-profit organization Contributors
- Oakland Unified School District
9 stations
- Coachella Valley Unified School District
9 stations
- El Centro Elementary School District
2 stations
Ravenswood City School District IOT2 stations
- West Contra Costa Unified School District
3 stations
- Rialto Unified School District
2 stations
Harvard-Westlake School3 stations
- Calexico Unified School District
2 stations
- Livermore Valley Unified School District
1 station
- Plaza Community Services La Roca Verde
1 station
- Los Angeles Unified School District
1 station
- nora caruso
1 station
Grove Preschool2 stations
13 Educational Contributors
AirGradient34 stations
Baldacci Family Vineyards1 station
Scribe Winery1 station
Forster Ranch1 station
IQAir Air Quality Science Team5 stations
- Stripe
1 station
6 Corporate Contributors
- Weledelzeergeleerde Heer
1 station
Pat Conway1 station
- Gustavo R. Guimarães
1 station
Aaron Solochek1 station
- GDH
1 station
- Steve
9 stations
- RSM1
1 station
- 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
- 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 Community Member
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
Friendly Neighbor1 station
- FlyGirl
1 station
- Lars
1 station
Hippopo1 station
- Hogwarts
1 station
- Fox Hill
1 station
- Stephen Schlie
1 station
- Shawn
1 station
- Brian Morton
1 station
Moreton Place Glendora1 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
- 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
chubert1 station
- Randy Steen
1 station
- Lorien
1 station
- Karl8704
1 station
- Wim Coekaerts
1 station
Darell1 station
- Andrew Webberley
1 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
JC1 station
- Wikinaut
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
- 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
- BJ
1 station
- eliotsensor
1 station
- Anonymous
1 station
- kpurvis
1 station
SP1 station
- David T
1 station
- Brad Blackwell
1 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
- 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
176 Individual Contributors
- 5339 Anonymous contributors
5339 stations
5339 Anonymous Contributors
15 Data sources
PurpleAir
Clarity Movement Co.- AirGradient
- [Clarity] - World Wide - v2
- 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?
- Patterson 122
- Westmorland 95
- Newman 86
- Huron 83
- Oceano 71
- King City 69
- Crestline 65
- Avocado Heights 64
- Azusa 64
- Bell Gardens 64
- Bradbury 64
- California City 64
- Charter Oak 64
- Chino 64
- Citrus 64
- Covina 64
- East La Mirada 64
- East Los Angeles 64
- East Pasadena 64
- East San Gabriel 64
- Glendora 64
- Indio 64
- Irwindale 64
- La Crescenta-Montrose 64
- La Puente 64
- Los Serranos 64
- Mayflower Village 64
- Montclair 64
- Montebello 64
- Newhall 64
- Placentia 64
- Rowland Heights 64
- San Antonio Heights 64
- San Dimas 64
- Santa Fe Springs 64
- South El Monte 64
- South San Gabriel 64
- South San Jose Hills 64
- South Whittier 64
- Temple City 64
- Tujunga 64
- Valinda 64
- Vincent 64
- Walnut 64
- West Puente Valley 64
- West Whittier-Los Nietos 64
- Artesia 63
- Bellflower 63
- Cerritos 63
- Commerce 63
- Eastvale 63
- Echo Park 63
- Florence-Graham 63
- Jurupa Valley 63
- La Palma 63
- Paramount 63
- Sun Village 63
- Sunland 63
- Universal City 63
- Villa Park 63
- Walnut Park 63
- Acton 62
- Agua Dulce 62
- Campo 62
- Desert View Highlands 62
- East Rancho Dominguez 62
- El Cerrito Corona 62
- Garden Grove 62
- Hacienda Heights 62
- Hawaiian Gardens 62
- Home Gardens 62
- Lake Los Angeles 62
- Los Alamitos 62
- Muscoy 62
- Norco 62
- Pedley 62
- Phelan 62
- Rossmoor 62
- San Fernando 62
- San Pablo 62
- Stanton 62
- Sunnyslope 62
- West Rancho Dominguez 62
- Westminster 62
- Westmont 62
- Adelanto 61
- Century City 61
- Del Aire 61
- Foothill Ranch 61
- Fountain Valley 61
- Grand Terrace 61
- Highgrove 61
- Ladera Heights 61
- Laguna Hills 61
- Lennox 61
- Leona Valley 61
- Midway City 61
- Mountain View Acres 61
- North Hills 61
- Northridge 61
- Portola Hills 61
- Rubidoux 61
- Woodcrest 61
- Alondra Park 60
- Coto De Caza 60
- Edwards Air Force Base 60
- La Mesa 60
- Lawndale 60
- March Air Force Base 60
- Mead Valley 60
- Mecca 60
- Mentone 60
- Shadow Hills 60
- Sherman Oaks 60
- Spring Valley Lake 60
- Three Rivers 60
- Altadena 59
- Beverly Hills 59
- Brawley 59
- Canyon Lake 59
- Clay 59
- Dogtown 59
- Earlimart 59
- East Porterville 59
- Farmersville 59
- Glendale 59
- Good Hope 59
- Hidden Hills 59
- Hollywood 59
- Lakeland Village 59
- Lindsay 59
- Lockeford 59
- Matheny 59
- Meadowbrook 59
- Monrovia 59
- Palos Verdes Estates 59
- Pasadena 59
- Pixley 59
- Poplar-Cotton Center 59
- Quail Valley 59
- San Marino 59
- San Pedro 59
- Santa Susana 59
- Sedco Hills 59
- Sierra Madre 59
- Strathmore 59
- Teviston 59
- Tipton 59
- Valley Springs 59
- Wildomar 59
- Woodville 59
- Yucaipa 59
- Alpaugh 58
- Antelope 58
- Arcadia 58
- Arvin 58
- Beaumont 58
- Big Bear City 58
- Bonsall 58
- Boron 58
- Camp Nelson 58
- Camp Pendleton North 58
- Casa de Oro-Mount Helix 58
- Cedar Ridge 58
- Chula Vista 58
- Collierville 58
- Cutler 58
- Cypress 58
- East Sonora 58
- Florin 58
- Foothill Farms 58
- Frazier Park 58
- Goshen 58
- Green Acres 58
- Greenacres 58
- Herald 58
- Homeland 58
- Ivanhoe 58
- Jamul 58
- Kern 58
- La Presa 58
- Lake Isabella 58
- Lamont 58
- Las Flores 58
- Lenwood 58
- London 58
- McFarland 58
- Menifee 58
- Mountain Ranch 58
- Murrieta Hot Springs 58
- National City 58
- North Edwards 58
- North Highlands 58
- North Hollywood 58
- Nuevo 58
- Orange Cove 58
- Patterson Tract 58
- Piru 58
- Rainbow 58
- Rancho San Diego 58
- Red Corral 58
- Richgrove 58
- Rolling Hills 58
- Romoland 58
- Rosedale 58
- Rosemont 58
- San Gabriel 58
- Sequoia National Park 58
- Soulsbyville 58
- Spring Valley 58
- Stallion Springs 58
- Sun City 58
- Vineyard 58
- Wasco 58
- Waterford 58
- Weedpatch 58
- Wofford Heights 58
- Woodlake 58
- Agoura 57
- Aguanga 57
- Armona 57
- Auburn Lake Trails 57
- Barstow Heights 57
- Bonadelle Ranchos-Madera Ranchos 57
- Bostonia 57
- Buttonwillow 57
- Cabazon 57
- Del Rey 57
- Del Rio 57
- Descanso 57
- East Hemet 57
- Empire 57
- Escalon 57
- Eucalyptus Hills 57
- Fairbanks Ranch 57
- Fowler 57
- Granite Hills 57
- Harbison Canyon 57
- Hidden Meadows 57
- Home Garden 57
- Hume 57
- Imperial Beach 57
- Kingsburg 57
- La Canada Flintridge 57
- La Jolla Shores 57
- Lake of the Pines 57
- Laton 57
- Minkler 57
- Mira Mesa 57
- Morada 57
- Old Fig Garden 57
- Parkway 57
- Pine Mountain Club 57
- Pine Valley 57
- Planada 57
- San Diego Country Estates 57
- San Pasqual 57
- Santa Clarita 57
- Selma 57
- Shafter 57
- Sheridan 57
- Sorrento Valley 57
- Sunnyside 57
- Tarpey Village 57
- Thornton 57
- Valle Vista 57
- Winter Gardens 57
- August 56
- Bermuda Dunes 56
- Bret Harte 56
- Bystrom 56
- Caruthers 56
- Ceres 56
- Delhi 56
- Denair 56
- Desert Edge 56
- Desert Shores 56
- Duarte 56
- Fairmead 56
- Fontana 56
- Ford City 56
- Garden Acres 56
- Garnet 56
- Highland 56
- Idyllwild 56
- Indian Wells 56
- Julian 56
- Kennedy 56
- Keyes 56
- Le Grand 56
- Lemoore 56
- Lincoln Village 56
- Linda 56
- Livingston 56
- Lost Hills 56
- Madera Acres 56
- Maricopa 56
- Oasis 56
- Olivehurst 56
- Parksdale 56
- Parkwood 56
- Rancho Mirage 56
- Rialto 56
- Salida 56
- San Joaquin 56
- Shackelford 56
- South Taft 56
- South Yuba City 56
- Stanislaus 56
- Taft Heights 56
- Thousand Palms 56
- Vista Santa Rosa 56
- West Park 56
- Winton 56
- Banning 55
- Berry Creek 55
- Biola 55
- Calipatria 55
- Coachella 55
- Colusa 55
- Country Club 55
- East Quincy 55
- El Cajon 55
- French Camp 55
- Hilmar-Irwin 55
- Johnstonville 55
- Joshua Tree 55
- Kirkwood 55
- La Riviera 55
- Littlerock 55
- Meiners Oaks 55
- Mira Monte 55
- Orange 55
- Reseda 55
- Riverdale Park 55
- San Bernardino 55
- Saticoy 55
- Stratford 55
- Taft Mosswood 55
- Tierra Buena 55
- Van Nuys 55
- Walnut Grove 55
- West Modesto 55
- Castaic 54
- El Rio 54
- Encino 54
- Gridley 54
- Heber 54
- La Jolla 54
- Lake Arrowhead 54
- Lemoore Station 54
- Niland 54
- Palmdale 54
- Seeley 54
- Sunnyside-Tahoe City 54
- Thermalito 54
- West Bishop 54
- Alhambra 53
- Big River 53
- Burbank 53
- Butte 53
- Channel Islands Beach 53
- Cherry Valley 53
- Desert Hot Springs 53
- Holtville 53
- Kettleman City 53
- La Verne 53
- Mesa Verde 53
- Monument Hills 53
- Rancho Cucamonga 53
- Redlands 53
- Rio Vista 53
- Running Springs 53
- San Andreas 53
- South Pasadena 53
- Studio City 53
- Val Verde 53
- Valencia 53
- West Athens 53
- West Hollywood 53
- Alum Rock 52
- Bloomington 52
- Bonita 52
- Boyle Heights 52
- Chatsworth 52
- Claremont 52
- Dinuba 52
- Dos Palos 52
- Fillmore 52
- Imperial 52
- La Habra 52
- Loma Linda 52
- Magalia 52
- Needles 52
- North El Monte 52
- Oak Hills 52
- Ontario 52
- Palm Desert 52
- Toro Canyon 52
- Upland 52
- Bethel Island 51
- Glen Avon 51
- Gustine 51
- Hesperia 51
- Los Angeles 51
- Monterey Park 51
- Plumas Lake 51
- South Dos Palos 51
- Tustin 51
- Willowbrook 51
- Biggs 50
- Blythe 50
- Colton 50
- Dunnigan 50
- Miramonte 50
- South Oroville 50
- Dirty Socks 49
- Forest Ranch 49
- Hartley 49
- Huntington Park 49
- Maywood 49
- Rosemead 49
- Victorville 49
- Avalon 48
- Canoga Park 48
- Idyllwild-Pine Cove 48
- Knightsen 48
- Koreatown 48
- Moreno Valley 48
- Rancho Penasquitos 48
- Yucca Valley 48
- Apple Valley 47
- Bell 47
- Lake Elsinore 47
- Lakeside 47
- Pico Rivera 47
- Westlake Village 47
- Lancaster 46
- Pomona 46
- Shandon 46
- West Covina 46
- Allendale 45
- Springville 45
- Tranquillity 45
- View Park-Windsor Hills 45
- Visalia 45
- Yosemite Np Turtleback Dome 45
- Cathedral City 44
- Oak View 44
- Palm Springs 44
- Rancho Santa Margarita 44
- Topanga 44
- Camp Pendleton South 43
- Cudahy 43
- La Mirada 43
- Sutter 43
- West Hills 43
- Willows 43
- Woodland Hills 43
- Beale Air Force Base 42
- Buena Park 42
- Calabasas 42
- Cayucos 42
- Corona 42
- June Lake 42
- Riverside 42
- Silver Lake 42
- Trona 42
- Yorba Linda 42
- Coronado 41
- Green Valley 41
- Marysville 41
- Norwalk 41
- Pinon Hills 41
- Summerland 41
- Agoura Hills 40
- Chino Hills 40
- Chowchilla 40
- Easton 40
- Lynwood 40
- Ramona 40
- South Gate 40
- Winchester 40
- Wrightwood 40
- Bridgeport 39
- Callender 39
- Carson 39
- Compton 39
- Grover Beach 39
- Hanford 39
- La Habra Heights 39
- Lake Nacimiento 39
- Red Bluff 39
- San Jacinto 39
- Santee 39
- Sky Valley 39
- Venice 39
- Waldon 39
- Whittier 39
- Anaheim 38
- Calexico 38
- Fullerton 38
- Hemet 38
- Lemon Grove 38
- Long Beach 38
- Oak Park 38
- Pacheco 38
- Palermo 38
- Signal Hill 38
- Simi Valley 38
- Yuba 38
- Yuba City 38
- Carmichael 37
- Durham 37
- Ione 37
- Lincoln 37
- Loma Rica 37
- Moorpark 37
- Orcutt 37
- Roseville 37
- Salton City 37
- San Diego 37
- Santa Ana 37
- Saranap 37
- Silver Lakes 37
- Sisquoc 37
- Vista 37
- Alta Sierra 36
- Arden-Arcade 36
- Ashland 36
- Broadmoor 36
- Buena Vista 36
- Cherryland 36
- Davenport 36
- East Foothills 36
- Elverta 36
- Gardena 36
- Hamilton City 36
- Los Alamos 36
- Stevenson Ranch 36
- Vandenberg Air Force Base 36
- Vine Hill 36
- Yosemite Valley 36
- Auburn 35
- Bodfish 35
- Cambrian Park 35
- China Lake Acres 35
- Culver City 35
- Encinitas 35
- Inyo 35
- Inyokern 35
- Kerman 35
- La Quinta 35
- Lakeview 35
- Lompico 35
- Lucerne Valley 35
- Marina del Rey 35
- Maxwell 35
- Mission Hills 35
- Mount Hermon 35
- North Tustin 35
- Orland 35
- Pasatiempo 35
- Redwood Shores 35
- Ridgecrest 35
- Rough and Ready 35
- Santa Ynez 35
- Searles Valley 35
- Seven Trees 35
- Twentynine Palms 35
- Valley Center 35
- Wheatland 35
- Amesti 34
- Aptos Hills-Larkin Valley 34
- Bishop 34
- Burney 34
- Citrus Heights 34
- Colma 34
- Downey 34
- Fort Irwin 34
- Interlaken 34
- Keeler 34
- Madera 34
- Merced 34
- Morongo Valley 34
- North Auburn 34
- Opal Cliffs 34
- Pajaro 34
- Rancho Cordova 34
- Rancho Tehama Reserve 34
- Ridgemark 34
- Rio Del Mar 34
- Rocklin 34
- Santa Paula 34
- Seacliff 34
- Twin Lakes 34
- Visitacion Valley 34
- Warner Springs 34
- Westwood 34
- Aliso Viejo 33
- Angels Camp 33
- Anza 33
- Big Bear Lake 33
- Boronda 33
- Carmel Valley Village 33
- Castroville 33
- Challenge-Brownsville 33
- Chico 33
- Chualar 33
- Dixon Lane-Meadow Creek 33
- El Dorado Hills 33
- El Monte 33
- Foresthill 33
- Hughson 33
- Kelso 33
- La Grange 33
- La Selva Beach 33
- Ladera Ranch 33
- Lakewood 33
- Las Lomas 33
- Lebec 33
- Lomita 33
- Mammoth Lakes 33
- Montalvin 33
- Morro Bay 33
- Nipomo 33
- North Richmond 33
- Olancha 33
- Rollingwood 33
- San Benito 33
- Shaver Lake 33
- Solano 33
- Tara Hills 33
- Tuolumne City 33
- Weldon 33
- Atascadero 32
- Atwater 32
- Barstow 32
- Camino 32
- Cool 32
- Fair Oaks 32
- Gonzales 32
- Granite Bay 32
- Hawthorne 32
- Kernville 32
- Los Molinos 32
- Nevada City 32
- Oildale 32
- Paradise 32
- Pine Grove 32
- Placerville 32
- Porterville 32
- Prather 32
- Quartz Hill 32
- Riverdale 32
- Seal Beach 32
- Terra Bella 32
- Woodland 32
- Alpine 31
- Borrego Springs 31
- Boyes Hot Springs 31
- Calimesa 31
- Cameron Park 31
- Coarsegold 31
- Copperopolis 31
- Downieville 31
- Escondido 31
- Firebaugh 31
- Fresno 31
- Georgetown 31
- Graeagle 31
- Grass Valley 31
- Jackson 31
- Murphys 31
- Nevada County 31
- Perris 31
- Sacramento 31
- Sleepy Hollow 31
- Sonora 31
- Tuolumne 31
- Bay Point 30
- Big Pine 30
- Coalinga 30
- Corralitos 30
- Discovery Bay 30
- East Oakdale 30
- Golden Hills 30
- Inglewood 30
- Linden 30
- Los Olivos 30
- Mariposa 30
- McCloud 30
- Modesto 30
- Orangevale 30
- Paicines 30
- Phoenix Lake 30
- Plumas 30
- Plymouth 30
- Portola 30
- Poway 30
- Rio Linda 30
- San Martin 30
- Solvang 30
- Tulare 30
- Ahwahnee 29
- Aptos 29
- Arroyo Grande 29
- Auberry 29
- Bass Lake 29
- Brentwood 29
- Coleville 29
- Davis 29
- Day Valley 29
- Diamond Springs 29
- Dollar Point 29
- El Verano 29
- Elk Grove 29
- Emeryville 29
- Exeter 29
- Folsom 29
- Gilroy 29
- Gold River 29
- Irvine 29
- Lathrop 29
- Lodi 29
- Loyalton 29
- Macdoel 29
- Meadow Vista 29
- Mendota 29
- Mission Viejo 29
- Murrieta 29
- North Fork 29
- Oakdale 29
- Oakhurst 29
- Penn Valley 29
- Rancho Murieta 29
- Rancho Palos Verdes 29
- Rosamond 29
- Sanger 29
- Santa Maria 29
- Sierra 29
- Soquel 29
- South Lake Tahoe 29
- Sutter Creek 29
- West Carson 29
- Winters 29
- Yosemite Lakes 29
- Alturas 28
- Amador 28
- Arnold 28
- Berkeley 28
- Bodega Bay 28
- Carlsbad 28
- Clovis 28
- Concord 28
- Dunsmuir 28
- Freedom 28
- Gerber 28
- Hollister 28
- Isla Vista 28
- Martinez 28
- Mountain House 28
- Newcastle 28
- Oakley 28
- Oroville 28
- Paso Robles 28
- Placer 28
- Rolling Hills Estates 28
- Santa Barbara 28
- Santa Margarita 28
- Shingle Springs 28
- Strawberry 28
- Susanville 28
- Woodbridge 28
- Yolo 28
- Yountville 28
- Albany 27
- Antioch 27
- Bakersfield 27
- Baldwin Park 27
- Cambria 27
- Camp Meeker 27
- Colfax 27
- Columbia 27
- Contra Costa Centre 27
- Crockett 27
- Dana Point 27
- Del Mar 27
- Diamond Bar 27
- Dixon 27
- El Centro 27
- El Dorado 27
- El Sobrante 27
- Esparto 27
- Fetters Hot Springs-Agua Caliente 27
- Glenn 27
- Laguna Beach 27
- Lake Forest 27
- Midpines 27
- Oakland 27
- Ojai 27
- Piedmont 27
- Pismo Beach 27
- Pittsburg 27
- Pleasant Hill 27
- Pollock Pines 27
- Roseland 27
- Tehachapi 27
- Thousand Oaks 27
- Trabuco Canyon 27
- Tracy 27
- Turlock 27
- Walnut Creek 27
- Alameda 26
- Buckhorn 26
- Calaveras 26
- Carnelian Bay 26
- Clayton 26
- Cuyama 26
- Danville 26
- Delano 26
- El Cerrito 26
- Galt 26
- Guadalupe 26
- Janesville 26
- Lafayette 26
- Laguna Niguel 26
- Lone Pine 26
- Los Banos 26
- Manteca 26
- Mojave 26
- Mono Vista 26
- Montague 26
- Montara 26
- Monte Rio 26
- Montgomery Creek 26
- Moraga 26
- Mount Shasta 26
- Newport Beach 26
- North Fair Oaks 26
- Olympic Valley 26
- Pinole 26
- Pioneer 26
- Riverbank 26
- San Luis Obispo 26
- Stockton 26
- Stonyford 26
- Taft 26
- Tahoe City 26
- Tahoe Vista 26
- Truckee 26
- Twain Harte 26
- Ventura 26
- Windsor 26
- American Canyon 25
- Aromas 25
- Corning 25
- Dublin 25
- Fort Jones 25
- Greenville 25
- Half Moon Bay 25
- Jamestown 25
- Kensington 25
- Kings Beach 25
- Laguna 25
- Marin City 25
- Napa 25
- Newark 25
- Orosi 25
- Richmond 25
- Saint Helena 25
- San Joaquin Hills 25
- San Lorenzo 25
- San Miguel 25
- Shingletown 25
- Suisun 25
- Tahoma 25
- Tamalpais-Homestead Valley 25
- Tulelake 25
- Vacaville 25
- Vandenberg Village 25
- Weed 25
- Willow Creek 25
- Wilton 25
- Acalanes Ridge 24
- Alamo 24
- Anderson 24
- Bear Valley Springs 24
- Bella Vista 24
- Bertsch-Oceanview 24
- Buellton 24
- Clearlake Oaks 24
- Cottonwood 24
- East Palo Alto 24
- East Richmond Heights 24
- Fairfield 24
- Fallbrook 24
- Fruitridge Pocket 24
- Hayward 24
- Healdsburg 24
- Hercules 24
- Hidden Valley Lake 24
- Loomis 24
- Loyola 24
- Milpitas 24
- Morgan Hill 24
- Orinda 24
- Parlier 24
- Redding 24
- Reedley 24
- Ripon 24
- Rodeo 24
- San Jose 24
- San Ramon 24
- Santa Rosa 24
- Sausalito 24
- Shasta 24
- Shasta Lake 24
- Sonoma 24
- Squaw Valley 24
- Templeton 24
- Vallejo 24
- Yreka 24
- Belvedere 23
- Benicia 23
- Byron 23
- Campbell 23
- Carpinteria 23
- Caspar 23
- Cloverdale 23
- Costa Mesa 23
- Crest 23
- Deer Park 23
- El Segundo 23
- Hayfork 23
- Kenwood 23
- Lake Wildwood 23
- Lakehead-Lakeshore 23
- Lee Vining 23
- Lewiston 23
- Livermore 23
- Lompoc 23
- Middletown 23
- Mill Valley 23
- Oceanside 23
- Palo Cedro 23
- Penngrove 23
- Quincy 23
- San Francisco 23
- San Leandro 23
- Santa Monica 23
- Santa Venetia 23
- Soledad 23
- Tehama 23
- Temelec 23
- Tiburon 23
- Torrance 23
- Union City 23
- Williams 23
- Angwin 22
- Arbuckle 22
- Bill Stanley 22
- Clear Lake Riviera 22
- Cupertino 22
- Diablo 22
- Fairview 22
- Fremont 22
- Guerneville 22
- Kentfield 22
- Klamath 22
- Larkfield-Wikiup 22
- Los Gatos 22
- Malibu 22
- Mission District 22
- Mountain View 22
- Novato 22
- Oxnard 22
- Palo Alto 22
- Petaluma 22
- Pleasanton 22
- Rancho Calaveras 22
- Rohnert Park 22
- Ross 22
- Salinas 22
- San Marcos 22
- San Rafael 22
- Santa Cruz 22
- Saratoga 22
- Soda Bay 22
- Sunnyvale 22
- Thermal 22
- Watsonville 22
- West Sacramento 22
- Atherton 21
- Bayside 21
- Bayview 21
- Camarillo 21
- Casa Conejo 21
- Castro Valley 21
- Corte Madera 21
- Cotati 21
- Emerald Lake Hills 21
- Greenfield 21
- Happy Camp 21
- Humboldt Hill 21
- Lagunitas-Forest Knolls 21
- Larkspur 21
- Los Altos 21
- Los Osos 21
- Menlo Park 21
- Monte Sereno 21
- Nice 21
- Pacifica 21
- Pine Hills 21
- Redondo Beach 21
- Redwood City 21
- Redwood Valley 21
- San Anselmo 21
- San Carlos 21
- Santa Clara 21
- Sebastopol 21
- Tamalpais Valley 21
- Ukiah 21
- Upper Lake 21
- Woodacre 21
- Belmont 20
- Ben Lomond 20
- Black Point-Green Point 20
- Brooktrails 20
- Burlingame 20
- Calistoga 20
- Carmel Valley 20
- Cobb 20
- Cutten 20
- El Granada 20
- Forestville 20
- Foster City 20
- Goleta 20
- Graton 20
- Highlands-Baywood Park 20
- Hornbrook 20
- Huntington Beach 20
- Kelseyville 20
- Lake San Marcos 20
- Lakeport 20
- Los Altos Hills 20
- Lower Lake 20
- Lucas Valley-Marinwood 20
- Marina 20
- Myrtletown 20
- Occidental 20
- Portola Valley 20
- Potter Valley 20
- Prunedale 20
- Rio Dell 20
- Talmage 20
- Willits 20
- Woodside 20
- Boulder Creek 19
- Brea 19
- Chester 19
- Del Monte Forest 19
- Gasquet 19
- Laytonville 19
- Lexington Hills 19
- Marin 19
- Monterey 19
- Nashville 19
- Noe Valley 19
- Redway 19
- San Juan Bautista 19
- San Mateo 19
- Siskiyou 19
- Stanford 19
- Brisbane 18
- Carmel-by-the-Sea 18
- Central Valley (historical) 18
- Covelo 18
- Daly City 18
- Del Rey Oaks 18
- Eldridge 18
- Elkhorn 18
- Felton 18
- Live Oak 18
- Lucerne 18
- Orleans 18
- Pacific Grove 18
- Scotts Valley 18
- Solana Beach 18
- South San Francisco 18
- Blue Lake 17
- Bolinas 17
- Ferndale 17
- Fort Bragg 17
- Hillsborough 17
- Hydesville 17
- Ladera 17
- Millbrae 17
- Mission Canyon 17
- North Lakeport 17
- Rancho Santa Fe 17
- Trinity 17
- West Menlo Park 17
- Blackhawk 16
- Brookdale 16
- Fairfax 16
- McKinleyville 16
- Moss Beach 16
- San Clemente 16
- Scotia 16
- Sea Ranch 16
- Westhaven-Moonstone 16
- Forest Meadows 15
- Hermosa Beach 15
- Hoopa 15
- Humboldt 15
- San Bruno 15
- Seaside 15
- Boonville 14
- Clearlake 14
- Eureka 14
- Oroville East 14
- Avenal 13
- Avila Beach 13
- Mendocino 13
- Mono 13
- Montecito 13
- San Juan Capistrano 13
- Weaverville 13
- Arcata 12
- Fortuna 12
- Inverness 12
- Gualala 11
- Crescent City 10
- Bonny Doon 9
- Temecula 9
- Point Arena 8
- Laguna Woods 7
- Port Hueneme 7
- Manhattan Beach 6
- Capitola 5
- Corcoran 5
AQI US, Metric