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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 |  Cathedral City | 119 |
| 2 | Beaumont | 95 |
| 3 | Mecca | 90 |
| 4 | Highland | 87 |
| 5 | Moreno Valley | 84 |
| 6 | Loma Linda | 82 |
| 7 | Redlands | 81 |
| 8 | Oak Hills | 80 |
| 9 | Imperial | 79 |
| 10 | Palm Desert | 79 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
5150 Contributors
See all
LIVE AQI CITY RANKING
Real-time California
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Bonny Doon | 0 |
| 2 | Acalanes Ridge | 1 |
| 3 | Riverbank | 1 |
| 4 | Brookdale | 2 |
| 5 | Freedom | 2 |
| 6 | Lake San Marcos | 2 |
| 7 | Lexington Hills | 2 |
| 8 | Scotts Valley | 2 |
| 9 | Aptos | 3 |
| 10 | Boulder Creek | 3 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
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Unhealthy for sensitive groups
Unhealthy
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The latest air quality news and resources.
California air quality data attribution
5150Contributors
- California Air Resources Board (CARB)
227 stations
- Spare the Air - Sacramento Region
13 stations
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El Dorado County Air Quality Management District11 stations
Palo Alto OES1 station
18 Government Contributors
Coalition for Clean Air (CCA)242 stations
Climate First: Replacing Oil and Gas (CFROG)2 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
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
- Plaza Community Services La Roca Verde
1 station
- Los Angeles Unified School District
1 station
- nora caruso
1 station
- Sunset Co-op Nursery School
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
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
- 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
- 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
Mario Zaizar1 station
Friendly Neighbor1 station
- FlyGirl
1 station
- Lars
1 station
Hippopo1 station
- Hogwarts
1 station
- Fox Hill
1 station
- Stephen Schlie
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
- 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
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
- 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
- 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
- Rana Rekhi
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
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
- 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
170 Individual Contributors
4939 Anonymous contributors4939 stations
4939 Anonymous Contributors
12 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)
Santa Barbara County Air Pollution Control District
Which is the most polluted city in California?
- Cathedral City 119
- Beaumont 95
- Mecca 90
- Highland 87
- Moreno Valley 84
- Loma Linda 82
- Redlands 81
- Oak Hills 80
- Imperial 79
- Palm Desert 79
- San Bernardino 77
- Bloomington 72
- Coachella 71
- La Habra 71
- Yucaipa 70
- Rancho Cucamonga 69
- Canoga Park 67
- Claremont 67
- Desert Shores 67
- Fontana 67
- Hesperia 67
- Tujunga 66
- Glendora 65
- West Hills 65
- Ontario 64
- Riverside 64
- Calexico 63
- Oasis 63
- Victorville 63
- Vista Santa Rosa 63
- Colton 62
- Indian Wells 62
- La Verne 62
- Miramonte 62
- Rialto 62
- Upland 62
- Woodland Hills 62
- Apple Valley 61
- Banning 61
- Bermuda Dunes 61
- Rancho Mirage 61
- Reseda 61
- San Jacinto 61
- Chatsworth 60
- Desert Edge 60
- Niland 60
- Thousand Palms 60
- Tulare 60
- Garnet 59
- Hemet 59
- Joshua Tree 59
- La Crescenta-Montrose 59
- Lakeview 59
- San Fernando 59
- West Covina 59
- Dirty Socks 58
- Encino 58
- Pomona 58
- Santa Clarita 58
- Silver Lakes 58
- Trona 58
- Big Bear City 57
- Big River 57
- Clay 56
- Dunnigan 56
- Herald 56
- Idyllwild 56
- Newhall 56
- Shafter 56
- Alpaugh 55
- Calipatria 55
- Chino Hills 55
- Corona 55
- Earlimart 55
- Glen Avon 55
- Mesa Verde 55
- Orange 55
- Palmdale 55
- Teviston 55
- Castaic 54
- La Mirada 54
- Lake Forest 54
- Lincoln Village 54
- Macdoel 54
- Mentone 54
- Seeley 54
- Tipton 54
- Valle Vista 54
- Whittier 54
- Burney 53
- Challenge-Brownsville 53
- East Hemet 53
- Hacienda Heights 53
- Heber 53
- Holtville 53
- Kern 53
- La Habra Heights 53
- Lake Elsinore 53
- Matheny 53
- Muscoy 53
- Palm Springs 53
- Poplar-Cotton Center 53
- Spring Valley Lake 53
- Val Verde 53
- Valencia 53
- Visalia 53
- Woodville 53
- Cabazon 52
- Caspar 52
- Goshen 52
- Grand Terrace 52
- Green Acres 52
- Highgrove 52
- Home Garden 52
- Kernville 52
- Lancaster 52
- Littlerock 52
- McFarland 52
- Nuevo 52
- Phelan 52
- Pixley 52
- Richgrove 52
- Rolling Hills Estates 52
- Rosamond 52
- Strathmore 52
- Topanga 52
- Barstow 51
- Barstow Heights 51
- Calabasas 51
- Duarte 51
- East Porterville 51
- Fort Jones 51
- Homeland 51
- Lost Hills 51
- March Air Force Base 51
- Mountain View Acres 51
- Needles 51
- Rubidoux 51
- Sunnyslope 51
- Three Rivers 51
- Adelanto 50
- Aguanga 50
- Farmersville 50
- Green Valley 50
- Lake of the Pines 50
- Lemoore 50
- Lindsay 50
- San Antonio Heights 50
- Stratford 50
- Winchester 50
- Armona 49
- Auburn Lake Trails 49
- Bill Stanley 49
- Buttonwillow 49
- California City 49
- Jurupa Valley 49
- La Mesa 49
- Lake Los Angeles 49
- Los Molinos 49
- Menifee 49
- Montclair 49
- Patterson Tract 49
- Pedley 49
- Woodcrest 49
- Boron 48
- Bridgeport 48
- Chino 48
- Dinuba 48
- Lenwood 48
- Norco 48
- Quail Valley 48
- Romoland 48
- Sun Village 48
- Willowbrook 48
- Yorba Linda 48
- Charter Oak 47
- Columbia 47
- Crestline 47
- Easton 47
- Good Hope 47
- Home Gardens 47
- Indio 47
- Julian 47
- Kettleman City 47
- Lakeland Village 47
- Los Serranos 47
- Moorpark 47
- North Tustin 47
- Salton City 47
- San Dimas 47
- Shandon 47
- Sherman Oaks 47
- Stevenson Ranch 47
- Westlake Village 47
- Azusa 46
- Citrus 46
- Covina 46
- Cutler 46
- Edwards Air Force Base 46
- El Cerrito Corona 46
- Foothill Ranch 46
- Laton 46
- Mead Valley 46
- Rosedale 46
- Sun City 46
- Valley Center 46
- Vincent 46
- Bradbury 45
- Camp Pendleton South 45
- Cerritos 45
- East Pasadena 45
- Irwindale 45
- Kingsburg 45
- La Palma 45
- Lemoore Station 45
- Meadowbrook 45
- North El Monte 45
- Rainbow 45
- Shadow Hills 45
- South Gate 45
- South San Jose Hills 45
- Springville 45
- Walnut 45
- Acton 44
- Bellflower 44
- Commerce 44
- Compton 44
- Desert View Highlands 44
- East Los Angeles 44
- Fountain Valley 44
- Los Alamitos 44
- Mayflower Village 44
- Monrovia 44
- North Hollywood 44
- Olancha 44
- Paramount 44
- Rowland Heights 44
- Simi Valley 44
- Valinda 44
- Weldon 44
- Avocado Heights 43
- Canyon Lake 43
- East Rancho Dominguez 43
- Greenacres 43
- Huntington Park 43
- Ivanhoe 43
- La Puente 43
- Mountain House 43
- Murrieta Hot Springs 43
- North Edwards 43
- Sheridan 43
- Signal Hill 43
- Temple City 43
- West Puente Valley 43
- Yuba 43
- East San Gabriel 42
- Kelso 42
- Pine Valley 42
- Placentia 42
- South El Monte 42
- Twain Harte 42
- Woodlake 42
- Altadena 41
- Descanso 41
- East La Mirada 41
- Lucerne Valley 41
- Rancho Palos Verdes 41
- Sedco Hills 41
- Selma 41
- South San Gabriel 41
- South Whittier 41
- Tuolumne 41
- Villa Park 41
- West Whittier-Los Nietos 41
- Yosemite Valley 41
- Agua Dulce 40
- Garden Grove 40
- Graeagle 40
- Linda 40
- London 40
- Maywood 40
- Montebello 40
- Olivehurst 40
- Orange Cove 40
- Perris 40
- Portola 40
- Santa Fe Springs 40
- Sky Valley 40
- Wildomar 40
- Alondra Park 39
- Avenal 39
- Bell Gardens 39
- Bodfish 39
- China Lake Acres 39
- Echo Park 39
- Fullerton 39
- Lamont 39
- National City 39
- Portola Hills 39
- San Diego Country Estates 39
- Sierra Madre 39
- South Yuba City 39
- Sunland 39
- Tustin 39
- Alpine 38
- Artesia 38
- Arvin 38
- Imperial Beach 38
- Inyokern 38
- Lakeside 38
- Lawndale 38
- Long Beach 38
- Los Olivos 38
- Lynwood 38
- Mission Viejo 38
- Pasadena 38
- Ramona 38
- San Gabriel 38
- Searles Valley 38
- South Oroville 38
- Stallion Springs 38
- Stanton 38
- Tierra Buena 38
- Tuolumne City 38
- Universal City 38
- Weedpatch 38
- Wofford Heights 38
- Antelope 37
- Arnold 37
- Blythe 37
- Boyle Heights 37
- Caruthers 37
- Coto De Caza 37
- Diamond Springs 37
- El Cajon 37
- El Verano 37
- Forest Meadows 37
- Harbison Canyon 37
- Hawaiian Gardens 37
- Jamul 37
- Laguna Hills 37
- Lake Isabella 37
- Lomita 37
- Midway City 37
- Ridgecrest 37
- Van Nuys 37
- Westminster 37
- Carson 36
- Fillmore 36
- Foothill Farms 36
- Fort Irwin 36
- Granite Hills 36
- La Canada Flintridge 36
- Lathrop 36
- Loma Rica 36
- Minkler 36
- North Highlands 36
- Norwalk 36
- Oak Park 36
- Rancho San Diego 36
- Sonora 36
- Walnut Park 36
- Baldwin Park 35
- Bass Lake 35
- Bishop 35
- Bostonia 35
- Buena Park 35
- Camp Nelson 35
- Casa de Oro-Mount Helix 35
- Cypress 35
- Dixon Lane-Meadow Creek 35
- Eucalyptus Hills 35
- Florence-Graham 35
- Irvine 35
- La Presa 35
- Maricopa 35
- Ojai 35
- Rossmoor 35
- San Andreas 35
- San Pasqual 35
- Winter Gardens 35
- Berry Creek 34
- Chula Vista 34
- Georgetown 34
- Hidden Meadows 34
- Ladera Ranch 34
- Murphys 34
- North Auburn 34
- Oakhurst 34
- Placerville 34
- Santa Ana 34
- Sequoia National Park 34
- Sunnyside 34
- Twentynine Palms 34
- Wrightwood 34
- Agoura Hills 33
- Bell 33
- Bonita 33
- Corcoran 33
- Durham 33
- Fairbanks Ranch 33
- Ford City 33
- Laguna Woods 33
- Leona Valley 33
- Mira Mesa 33
- Old Fig Garden 33
- Red Bluff 33
- Riverdale Park 33
- Rosemont 33
- Studio City 33
- Tarpey Village 33
- Thermalito 33
- Thousand Oaks 33
- West Park 33
- Westmorland 33
- Arcadia 32
- Big Pine 32
- Bonsall 32
- Byron 32
- Camino 32
- Colusa 32
- Downieville 32
- Florin 32
- Koreatown 32
- Los Angeles 32
- Montalvin 32
- Newport Beach 32
- Oak View 32
- Pico Rivera 32
- Pioneer 32
- Rough and Ready 32
- Shasta Lake 32
- Sorrento Valley 32
- South Taft 32
- Taft Heights 32
- Vineyard 32
- West Athens 32
- West Rancho Dominguez 32
- Westmont 32
- Biola 31
- Bonadelle Ranchos-Madera Ranchos 31
- Camp Pendleton North 31
- Del Rey 31
- Desert Hot Springs 31
- Dogtown 31
- Gardena 31
- Hanford 31
- Hume 31
- Keeler 31
- La Jolla Shores 31
- Las Flores 31
- Loyalton 31
- Marysville 31
- Mono Vista 31
- Mountain Ranch 31
- North Hills 31
- North Richmond 31
- Placer 31
- Pollock Pines 31
- Rancho Santa Margarita 31
- Red Corral 31
- San Pablo 31
- Shaver Lake 31
- Strawberry 31
- Valley Springs 31
- West Carson 31
- Auburn 30
- Buckhorn 30
- Calaveras 30
- Cedar Ridge 30
- Century City 30
- Coleville 30
- Collierville 30
- Corning 30
- Del Aire 30
- East Sonora 30
- El Dorado 30
- Escalon 30
- Ferndale 30
- Fowler 30
- Frazier Park 30
- Glendale 30
- Hollywood 30
- Lemon Grove 30
- Lennox 30
- Lockeford 30
- Madera Acres 30
- Mendocino 30
- Orosi 30
- Parkwood 30
- Pine Grove 30
- Pinon Hills 30
- South Lake Tahoe 30
- Westhaven-Moonstone 30
- Yosemite Np Turtleback Dome 30
- Blue Lake 29
- Butte 29
- El Segundo 29
- Fairmead 29
- Gasquet 29
- Grass Valley 29
- La Grange 29
- Ladera Heights 29
- Le Grand 29
- Lee Vining 29
- Mammoth Lakes 29
- Northridge 29
- Paradise 29
- Parkway 29
- Piru 29
- San Joaquin Hills 29
- San Marino 29
- Soulsbyville 29
- Sunnyside-Tahoe City 29
- Truckee 29
- View Park-Windsor Hills 29
- Yucca Valley 29
- Alhambra 28
- Alta Sierra 28
- Beverly Hills 28
- Borrego Springs 28
- Campo 28
- Colfax 28
- Cudahy 28
- Fort Bragg 28
- Hamilton City 28
- Inyo 28
- June Lake 28
- Laguna Beach 28
- Lakewood 28
- Lone Pine 28
- Maxwell 28
- Orland 28
- Planada 28
- San Pedro 28
- Tahoe City 28
- Waterford 28
- West Bishop 28
- August 27
- Big Bear Lake 27
- Chico 27
- Dana Point 27
- Del Rio 27
- Diamond Bar 27
- Dollar Point 27
- Empire 27
- Exeter 27
- Foresthill 27
- Fortuna 27
- Garden Acres 27
- La Quinta 27
- Magalia 27
- Meadow Vista 27
- Monterey Park 27
- Morada 27
- Morongo Valley 27
- Nevada City 27
- Nevada County 27
- Palos Verdes Estates 27
- Parlier 27
- Phoenix Lake 27
- Rancho Penasquitos 27
- Rolling Hills 27
- San Joaquin 27
- Santee 27
- Squaw Valley 27
- Tahoma 27
- Thornton 27
- Wasco 27
- Winton 27
- Biggs 26
- Bystrom 26
- Casa Conejo 26
- Delhi 26
- Denair 26
- Fallbrook 26
- Forest Ranch 26
- Hydesville 26
- Idyllwild-Pine Cove 26
- Kennedy 26
- Keyes 26
- Kirkwood 26
- Lake Arrowhead 26
- North Fork 26
- Porterville 26
- Rancho Murieta 26
- Salida 26
- Santa Paula 26
- Seal Beach 26
- Shackelford 26
- Stanislaus 26
- Taft Mosswood 26
- Tahoe Vista 26
- Trabuco Canyon 26
- Walnut Grove 26
- Anaheim 25
- Bakersfield 25
- Brentwood 25
- Bret Harte 25
- Carnelian Bay 25
- Costa Mesa 25
- Country Club 25
- Downey 25
- Elk Grove 25
- Eureka 25
- French Camp 25
- Gerber 25
- Huntington Beach 25
- Livingston 25
- Marin City 25
- Merced 25
- Mono 25
- Monument Hills 25
- Morro Bay 25
- Parksdale 25
- Pine Mountain Club 25
- Poway 25
- Prather 25
- Redondo Beach 25
- Redway 25
- Rio Vista 25
- Santa Susana 25
- South Pasadena 25
- Temecula 25
- Warner Springs 25
- West Modesto 25
- Willows 25
- Bayview 24
- Bethel Island 24
- Broadmoor 24
- Calimesa 24
- Cherryland 24
- Coronado 24
- Gridley 24
- Hidden Hills 24
- Hilmar-Irwin 24
- Humboldt Hill 24
- Linden 24
- Livermore 24
- Marina del Rey 24
- Mariposa 24
- McKinleyville 24
- Oildale 24
- Penn Valley 24
- Pine Hills 24
- Pleasanton 24
- Silver Lake 24
- Sutter Creek 24
- Tehama 24
- Torrance 24
- Ventura 24
- West Hollywood 24
- Auberry 23
- Avalon 23
- Coalinga 23
- Cool 23
- Crescent City 23
- Cutten 23
- East Quincy 23
- Fruitridge Pocket 23
- Golden Hills 23
- Hartley 23
- Myrtletown 23
- Plumas Lake 23
- Rancho Cordova 23
- Running Springs 23
- Stonyford 23
- Venice 23
- Aliso Viejo 22
- Allendale 22
- Antioch 22
- Arcata 22
- Buena Vista 22
- Capitola 22
- Carmichael 22
- Coarsegold 22
- Discovery Bay 22
- Dublin 22
- Hawthorne 22
- Huron 22
- Knightsen 22
- La Riviera 22
- Laguna Niguel 22
- Manteca 22
- Modesto 22
- Moraga 22
- Nashville 22
- Patterson 22
- Plumas 22
- Redding 22
- San Diego 22
- Solano 22
- Taft 22
- Thermal 22
- Tracy 22
- Yolo 22
- Agoura 21
- Bay Point 21
- Encinitas 21
- Fresno 21
- Jackson 21
- Kings Beach 21
- Malibu 21
- Meiners Oaks 21
- Murrieta 21
- Rancho Tehama Reserve 21
- Rio Dell 21
- San Ramon 21
- Sanger 21
- Scotia 21
- Sierra 21
- Susanville 21
- Tehachapi 21
- Terra Bella 21
- Wheatland 21
- Angels Camp 20
- Brea 20
- Camarillo 20
- Channel Islands Beach 20
- Clearlake Oaks 20
- Clovis 20
- Crockett 20
- Danville 20
- Dunsmuir 20
- Elverta 20
- Gustine 20
- Hayfork 20
- Interlaken 20
- Lake Wildwood 20
- Lodi 20
- Middletown 20
- Oakley 20
- Port Hueneme 20
- Sacramento 20
- San Clemente 20
- Solvang 20
- Turlock 20
- Vista 20
- Ahwahnee 19
- Amador 19
- Anderson 19
- Ashland 19
- Atwater 19
- Boyes Hot Springs 19
- Camp Meeker 19
- Carlsbad 19
- Citrus Heights 19
- Clear Lake Riviera 19
- Colma 19
- Concord 19
- Contra Costa Centre 19
- Crest 19
- Deer Park 19
- Del Mar 19
- Dos Palos 19
- Esparto 19
- Happy Camp 19
- Johnstonville 19
- Live Oak 19
- McCloud 19
- Mojave 19
- Newcastle 19
- Nice 19
- Oceanside 19
- Plymouth 19
- Redwood Shores 19
- Ripon 19
- Rollingwood 19
- Roseland 19
- Rosemead 19
- Saranap 19
- Shasta 19
- Sleepy Hollow 19
- Soda Bay 19
- South Dos Palos 19
- Spring Valley 19
- Tara Hills 19
- Upper Lake 19
- Vine Hill 19
- Visitacion Valley 19
- Waldon 19
- Walnut Creek 19
- Yuba City 19
- Bear Valley Springs 18
- Brawley 18
- Cameron Park 18
- Cayucos 18
- Davenport 18
- Delano 18
- East Foothills 18
- East Oakdale 18
- El Rio 18
- Escondido 18
- Fair Oaks 18
- Gold River 18
- Greenfield 18
- Ione 18
- Janesville 18
- King City 18
- Laytonville 18
- Lewiston 18
- Lincoln 18
- Lompico 18
- Madera 18
- Manhattan Beach 18
- Mira Monte 18
- Mount Hermon 18
- Olympic Valley 18
- Oxnard 18
- Rio Linda 18
- Santa Ynez 18
- Saticoy 18
- Shingle Springs 18
- Shingletown 18
- Summerland 18
- Sutter 18
- Ukiah 18
- Woodland 18
- Alamo 17
- Bayside 17
- Benicia 17
- Bertsch-Oceanview 17
- Brooktrails 17
- Callender 17
- Cambrian Park 17
- Cherry Valley 17
- Cobb 17
- Copperopolis 17
- Culver City 17
- Glenn 17
- Grover Beach 17
- Hughson 17
- Inglewood 17
- Lake Nacimiento 17
- Los Alamos 17
- Mission Hills 17
- Montague 17
- Napa 17
- Opal Cliffs 17
- Orcutt 17
- Pasatiempo 17
- Pittsburg 17
- Roseville 17
- San Benito 17
- San Miguel 17
- Seacliff 17
- Seven Trees 17
- Sisquoc 17
- Vandenberg Air Force Base 17
- Winters 17
- Yosemite Lakes 17
- Alturas 16
- Amesti 16
- Aptos Hills-Larkin Valley 16
- Bolinas 16
- Calistoga 16
- Carmel Valley Village 16
- Castroville 16
- Central Valley (historical) 16
- Chester 16
- Clayton 16
- Cloverdale 16
- Davis 16
- Greenville 16
- Hercules 16
- Hermosa Beach 16
- Hidden Valley Lake 16
- Kelseyville 16
- Kerman 16
- Klamath 16
- Lakehead-Lakeshore 16
- Las Lomas 16
- Los Banos 16
- Oceano 16
- Orangevale 16
- Paicines 16
- Pajaro 16
- Palermo 16
- Quincy 16
- Redwood Valley 16
- Rocklin 16
- Saint Helena 16
- Talmage 16
- Toro Canyon 16
- Alum Rock 15
- Boronda 15
- Cottonwood 15
- El Dorado Hills 15
- Kenwood 15
- Lompoc 15
- Oroville 15
- Reedley 15
- Tranquillity 15
- Union City 15
- American Canyon 14
- Chualar 14
- Fremont 14
- Hornbrook 14
- Lafayette 14
- Loomis 14
- Lucerne 14
- Mount Shasta 14
- Newark 14
- Oakdale 14
- Oakland 14
- Pleasant Hill 14
- Ridgemark 14
- Santa Monica 14
- Trinity 14
- Weed 14
- West Menlo Park 14
- Woodbridge 14
- Yreka 14
- Blackhawk 13
- Covelo 13
- Cuyama 13
- Dixon 13
- East Palo Alto 13
- Firebaugh 13
- Folsom 13
- Gonzales 13
- Granite Bay 13
- Humboldt 13
- Inverness 13
- Lakeport 13
- Midpines 13
- Point Arena 13
- San Juan Bautista 13
- Santa Barbara 13
- Stockton 13
- Tulelake 13
- Vallejo 13
- Westwood 13
- Alameda 12
- Beale Air Force Base 12
- Buellton 12
- Carmel Valley 12
- Carpinteria 12
- Chowchilla 12
- Hayward 12
- Kensington 12
- Mendota 12
- Newman 12
- Orinda 12
- Oroville East 12
- Palo Cedro 12
- Penngrove 12
- Piedmont 12
- Potter Valley 12
- Riverdale 12
- Santa Rosa 12
- Santa Venetia 12
- Sonoma 12
- Weaverville 12
- Williams 12
- Willow Creek 12
- Albany 11
- Angwin 11
- Anza 11
- Castro Valley 11
- Eastvale 11
- Eldridge 11
- Fairfield 11
- Fetters Hot Springs-Agua Caliente 11
- Healdsburg 11
- La Jolla 11
- Lagunitas-Forest Knolls 11
- Larkspur 11
- Marina 11
- Martinez 11
- Mill Valley 11
- Milpitas 11
- Petaluma 11
- Pinole 11
- Rio Del Mar 11
- San Jose 11
- San Juan Capistrano 11
- Santa Clara 11
- Seaside 11
- Soledad 11
- Suisun 11
- Tamalpais-Homestead Valley 11
- Tamalpais Valley 11
- Vacaville 11
- Vandenberg Village 11
- Bodega Bay 10
- Corte Madera 10
- Del Rey Oaks 10
- Diablo 10
- Emeryville 10
- Goleta 10
- Graton 10
- Hoopa 10
- Laguna 10
- Loyola 10
- Lucas Valley-Marinwood 10
- Menlo Park 10
- North Fair Oaks 10
- Novato 10
- Occidental 10
- Palo Alto 10
- Rodeo 10
- San Rafael 10
- Siskiyou 10
- Tiburon 10
- Woodacre 10
- Arden-Arcade 9
- Atascadero 9
- Atherton 9
- Berkeley 9
- Cambria 9
- Cupertino 9
- El Sobrante 9
- Fairview 9
- Gualala 9
- Guerneville 9
- Half Moon Bay 9
- Isla Vista 9
- Kentfield 9
- Los Altos 9
- Mountain View 9
- Nipomo 9
- Paso Robles 9
- Rancho Calaveras 9
- Redwood City 9
- Ross 9
- San Leandro 9
- San Lorenzo 9
- Saratoga 9
- Sea Ranch 9
- Sebastopol 9
- South San Francisco 9
- Yountville 9
- Arroyo Grande 8
- Bella Vista 8
- Boonville 8
- Campbell 8
- El Granada 8
- Los Altos Hills 8
- Montara 8
- Pacheco 8
- Pacifica 8
- Portola Valley 8
- Rancho Santa Fe 8
- Rohnert Park 8
- Salinas 8
- San Anselmo 8
- San Carlos 8
- San Francisco 8
- San Luis Obispo 8
- Sausalito 8
- Solana Beach 8
- Stanford 8
- Sunnyvale 8
- Temelec 8
- Twin Lakes 8
- West Sacramento 8
- Wilton 8
- Belvedere 7
- Black Point-Green Point 7
- Burbank 7
- East Richmond Heights 7
- El Cerrito 7
- El Monte 7
- Jamestown 7
- Ladera 7
- Larkfield-Wikiup 7
- Los Gatos 7
- Lower Lake 7
- Marin 7
- Mission Canyon 7
- Monte Rio 7
- Monterey 7
- Morgan Hill 7
- Noe Valley 7
- Orleans 7
- Pismo Beach 7
- Richmond 7
- Willits 7
- Windsor 7
- Woodside 7
- Arbuckle 6
- Aromas 6
- Daly City 6
- Fairfax 6
- Forestville 6
- Gilroy 6
- Guadalupe 6
- Monte Sereno 6
- San Bruno 6
- San Marcos 6
- Santa Cruz 6
- Santa Margarita 6
- Brisbane 5
- Burlingame 5
- Carmel-by-the-Sea 5
- Corralitos 5
- Del Monte Forest 5
- El Centro 5
- Felton 5
- Galt 5
- Highlands-Baywood Park 5
- Lebec 5
- Millbrae 5
- Mission District 5
- Montecito 5
- Pacific Grove 5
- Prunedale 5
- San Martin 5
- Watsonville 5
- Avila Beach 4
- Belmont 4
- Ben Lomond 4
- Ceres 4
- Clearlake 4
- Cotati 4
- Elkhorn 4
- Hillsborough 4
- Hollister 4
- Los Osos 4
- Moss Beach 4
- North Lakeport 4
- Quartz Hill 4
- San Mateo 4
- Santa Maria 4
- Soquel 4
- Templeton 4
- Aptos 3
- Boulder Creek 3
- Day Valley 3
- Emerald Lake Hills 3
- Foster City 3
- La Selva Beach 3
- Brookdale 2
- Freedom 2
- Lake San Marcos 2
- Lexington Hills 2
- Scotts Valley 2
- Acalanes Ridge 1
- Riverbank 1
- Bonny Doon 0
AQI US, Metric