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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 | Orosi | 137 |
| 2 | Cutler | 117 |
| 3 | Parlier | 97 |
| 4 | San Bernardino | 93 |
| 5 | Bloomington | 88 |
| 6 | Loma Linda | 87 |
| 7 | Highland | 85 |
| 8 | Beaumont | 83 |
| 9 | Fontana | 82 |
| 10 | San Fernando | 79 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
5360 Contributors
See all
LIVE AQI CITY RANKING
Real-time California
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Capitola | 1 |
| 2 | Cambria | 2 |
| 3 | Templeton | 2 |
| 4 | Anza | 4 |
| 5 | Buellton | 6 |
| 6 | Oroville East | 6 |
| 7 | Boonville | 7 |
| 8 | Lexington Hills | 7 |
| 9 | Los Osos | 7 |
| 10 | Orcutt | 7 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
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Moderate
Unhealthy for sensitive groups
Unhealthy
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Hazardous
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The latest air quality news and resources.
California air quality data attribution
5360Contributors
- California Air Resources Board (CARB)
227 stations
- Spare the Air - Sacramento Region
12 stations
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NASA Jet Propulsion Laboratory (JPL)1 station
USA National Park Service25 stations
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El Dorado County Air Quality Management District11 stations
Palo Alto OES1 station
20 Government Contributors
Coalition for Clean Air (CCA)246 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
3 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
- 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
- Rialto Unified School District
1 station
Grove Preschool1 station
USC Environmental Health Centers1 station
15 Educational Contributors
Scribe Winery1 station
Forster Ranch1 station
IQAir Air Quality Science Team5 stations
- Stripe
1 station
4 Corporate Contributors
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
178 Individual Contributors
5139 Anonymous contributors5139 stations
5139 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?
- Rialto 152
- Orosi 115
- Exeter 106
- Cutler 99
- Bloomington 91
- Highland 91
- San Bernardino 89
- Del Rey 88
- Loma Linda 88
- Parlier 87
- Baldwin Park 86
- Beaumont 83
- Fontana 80
- Imperial 77
- Redlands 77
- Riverside 76
- Glen Avon 74
- Ontario 74
- San Fernando 74
- Rancho Cucamonga 73
- Santa Clarita 73
- Claremont 72
- Moreno Valley 72
- Diamond Bar 71
- Beverly Hills 70
- Shadow Hills 70
- Visalia 70
- Reseda 69
- Van Nuys 67
- Colton 66
- North Hollywood 66
- Tujunga 65
- Upland 65
- Weldon 65
- Yucaipa 65
- Canoga Park 64
- Glendale 64
- Hacienda Heights 64
- Hollywood 64
- La Crescenta-Montrose 64
- Sherman Oaks 64
- Simi Valley 64
- San Gabriel 63
- Tulare 63
- Chatsworth 62
- La Canada Flintridge 62
- Pomona 62
- Springville 62
- La Verne 61
- Paramount 61
- San Marino 61
- West Hills 61
- Boyle Heights 60
- Golden Hills 60
- Studio City 60
- Castaic 59
- El Segundo 59
- Los Angeles 59
- Pasadena 59
- San Jacinto 59
- Valencia 59
- Clovis 58
- Corona 58
- Monrovia 58
- Monterey Park 58
- Porterville 58
- South Pasadena 58
- Altadena 57
- Arcadia 57
- Bodfish 57
- Coachella 57
- Culver City 57
- Glendora 57
- Koreatown 57
- Mojave 57
- Moorpark 57
- San Pablo 57
- West Hollywood 57
- Alhambra 56
- Oak Park 56
- Val Verde 56
- Woodland Hills 56
- Burbank 55
- Calipatria 55
- La Mesa 55
- Lakeview 55
- Prather 55
- Sierra Madre 55
- Topanga 55
- Calabasas 54
- Duarte 54
- Encino 54
- Hemet 54
- La Habra 54
- Newhall 54
- Thousand Oaks 54
- Westlake Village 54
- Agoura Hills 53
- Redondo Beach 53
- Rosemead 53
- San Joaquin 53
- Santa Monica 53
- Three Rivers 53
- Manhattan Beach 52
- Rancho Penasquitos 52
- View Park-Windsor Hills 52
- Marina del Rey 51
- Kernville 50
- Mecca 50
- Hawthorne 49
- Venice 49
- Willowbrook 49
- Chino Hills 48
- Huntington Park 48
- Brawley 47
- Maywood 46
- Banning 45
- West Covina 45
- Westwood 45
- Casa Conejo 44
- Lake Elsinore 44
- Lakeside 44
- Murrieta 44
- Silver Lake 44
- Bonita 43
- Dublin 43
- Gardena 43
- Matheny 43
- Tipton 43
- Armona 42
- Camarillo 42
- Earlimart 42
- East Palo Alto 42
- Goshen 42
- Home Garden 42
- Indio 42
- Laton 42
- Lemoore 42
- Pixley 42
- Poplar-Cotton Center 42
- Sutter 42
- Teviston 42
- West Menlo Park 42
- Woodville 42
- Alpaugh 41
- Avocado Heights 41
- Azusa 41
- Bell 41
- Bell Gardens 41
- Bradbury 41
- Caruthers 41
- Charter Oak 41
- Citrus 41
- Commerce 41
- Covina 41
- Cypress 41
- East La Mirada 41
- East Los Angeles 41
- East Pasadena 41
- East San Gabriel 41
- Echo Park 41
- El Cajon 41
- Irwindale 41
- Kern 41
- Kingsburg 41
- La Puente 41
- Lemoore Station 41
- London 41
- Mayflower Village 41
- Montebello 41
- North El Monte 41
- North Fair Oaks 41
- Patterson Tract 41
- Pico Rivera 41
- Poway 41
- Rowland Heights 41
- San Dimas 41
- Santa Fe Springs 41
- Selma 41
- Shafter 41
- South El Monte 41
- South San Gabriel 41
- South San Jose Hills 41
- South Whittier 41
- Stevenson Ranch 41
- Stratford 41
- Temple City 41
- Twentynine Palms 41
- Universal City 41
- Valinda 41
- Vincent 41
- Walnut 41
- West Carson 41
- West Puente Valley 41
- West Whittier-Los Nietos 41
- Yorba Linda 41
- Artesia 40
- Atherton 40
- Bakersfield 40
- Bellflower 40
- Blackhawk 40
- Cerritos 40
- Compton 40
- East Rancho Dominguez 40
- Farmersville 40
- Florence-Graham 40
- Fowler 40
- Fremont 40
- Hanford 40
- Hawaiian Gardens 40
- Inglewood 40
- Ivanhoe 40
- La Palma 40
- La Riviera 40
- Lindsay 40
- Malibu 40
- Newark 40
- Oxnard 40
- Placentia 40
- Ramona 40
- Richgrove 40
- South Gate 40
- Strathmore 40
- Sunland 40
- Sunnyvale 40
- Terra Bella 40
- Union City 40
- Walnut Park 40
- Barstow 39
- Biola 39
- Century City 39
- Chino 39
- Delano 39
- Dinuba 39
- East Porterville 39
- Lancaster 39
- Los Serranos 39
- Loyola 39
- McFarland 39
- Montclair 39
- Mountain View 39
- Palm Desert 39
- Pleasanton 39
- Reedley 39
- San Antonio Heights 39
- San Ramon 39
- Stanton 39
- Sunnyside 39
- West Athens 39
- West Park 39
- West Rancho Dominguez 39
- Westmont 39
- Acton 38
- Alondra Park 38
- California City 38
- Camp Pendleton South 38
- Cupertino 38
- Del Aire 38
- Fort Irwin 38
- Garden Grove 38
- Inyokern 38
- Ladera Heights 38
- Lennox 38
- Los Alamitos 38
- Oildale 38
- Old Fig Garden 38
- Palo Alto 38
- Parksdale 38
- Parkwood 38
- Redwood City 38
- Rossmoor 38
- Sanger 38
- Solano 38
- Sun Village 38
- Tarpey Village 38
- Torrance 38
- Victorville 38
- Villa Park 38
- Agua Dulce 37
- Bonadelle Ranchos-Madera Ranchos 37
- Collierville 37
- Desert View Highlands 37
- Escalon 37
- Fairmead 37
- Fallbrook 37
- Fullerton 37
- Hayward 37
- Heber 37
- Herald 37
- Jurupa Valley 37
- La Mirada 37
- Lawndale 37
- Livermore 37
- Los Altos 37
- Lucerne Valley 37
- Lynwood 37
- Madera Acres 37
- Mendota 37
- Midway City 37
- Minkler 37
- Norco 37
- North Hills 37
- Northridge 37
- Orange 37
- Phelan 37
- Santee 37
- Thornton 37
- Vista 37
- Westminster 37
- Anaheim 36
- Antelope 36
- August 36
- Bret Harte 36
- Burney 36
- Bystrom 36
- Clay 36
- Colusa 36
- Country Club 36
- Crockett 36
- Del Rio 36
- Delhi 36
- Denair 36
- Dogtown 36
- Dos Palos 36
- Easton 36
- El Cerrito Corona 36
- Empire 36
- Fairview 36
- Florin 36
- Foothill Farms 36
- Fountain Valley 36
- French Camp 36
- Garden Acres 36
- Greenfield 36
- Hidden Hills 36
- Hilmar-Irwin 36
- Holtville 36
- Home Gardens 36
- Kennedy 36
- Kettleman City 36
- Keyes 36
- Lake Los Angeles 36
- Le Grand 36
- Lincoln Village 36
- Linden 36
- Livingston 36
- Lockeford 36
- Los Altos Hills 36
- Menlo Park 36
- Monument Hills 36
- Morada 36
- Mountain House 36
- North Highlands 36
- Orange Cove 36
- Palos Verdes Estates 36
- Parkway 36
- Pedley 36
- Planada 36
- Riverbank 36
- Rosamond 36
- Rosemont 36
- Salida 36
- San Pedro 36
- Searles Valley 36
- Seeley 36
- Shackelford 36
- Signal Hill 36
- Silver Lakes 36
- South Dos Palos 36
- Stanislaus 36
- Taft Mosswood 36
- Ventura 36
- Vineyard 36
- Walnut Grove 36
- Waterford 36
- West Modesto 36
- Westmorland 36
- Whittier 36
- Winton 36
- Woodlake 36
- Allendale 35
- Calexico 35
- Carson 35
- Castro Valley 35
- Greenacres 35
- Hartley 35
- Las Flores 35
- Lodi 35
- Lomita 35
- Muscoy 35
- Niland 35
- Portola Valley 35
- Riverdale Park 35
- Rolling Hills 35
- Rosedale 35
- Rubidoux 35
- Santa Susana 35
- Sequoia National Park 35
- Sunnyslope 35
- Bethel Island 34
- China Lake Acres 34
- Dunnigan 34
- Foothill Ranch 34
- Goleta 34
- Grand Terrace 34
- Hermosa Beach 34
- Highgrove 34
- La Habra Heights 34
- Newman 34
- Oceanside 34
- Portola Hills 34
- Salton City 34
- Stallion Springs 34
- Valley Center 34
- Woodside 34
- Yosemite Np Turtleback Dome 34
- Agoura 33
- Aliso Viejo 33
- Alum Rock 33
- Arvin 33
- Biggs 33
- Corcoran 33
- Coto De Caza 33
- Danville 33
- Edwards Air Force Base 33
- El Monte 33
- Gridley 33
- Gustine 33
- Kenwood 33
- Laguna Hills 33
- Lamont 33
- Lathrop 33
- March Air Force Base 33
- Morro Bay 33
- Pine Mountain Club 33
- Rancho Santa Margarita 33
- Santa Clara 33
- Saratoga 33
- Shandon 33
- Tranquillity 33
- Weedpatch 33
- Woodcrest 33
- Adelanto 32
- Avenal 32
- Carlsbad 32
- Cherry Valley 32
- Clear Lake Riviera 32
- Cudahy 32
- Lake Isabella 32
- Lemon Grove 32
- Lost Hills 32
- Mead Valley 32
- Milpitas 32
- Mountain View Acres 32
- North Edwards 32
- Pinon Hills 32
- Piru 32
- Santa Ana 32
- South Oroville 32
- Stanford 32
- Tustin 32
- Valley Springs 32
- Apple Valley 31
- Bear Valley Springs 31
- Boron 31
- Boyes Hot Springs 31
- Buttonwillow 31
- Campbell 31
- Canyon Lake 31
- Clearlake Oaks 31
- Coronado 31
- El Centro 31
- Escondido 31
- Fort Jones 31
- Frazier Park 31
- Fresno 31
- Good Hope 31
- Knightsen 31
- La Quinta 31
- Lakeland Village 31
- Littlerock 31
- Madera 31
- Meadowbrook 31
- Mentone 31
- North Tustin 31
- Oak View 31
- Palmdale 31
- Ridgecrest 31
- Rio Vista 31
- San Leandro 31
- Soda Bay 31
- Spring Valley Lake 31
- Squaw Valley 31
- Talmage 31
- Wofford Heights 31
- American Canyon 30
- Blythe 30
- Bostonia 30
- Brisbane 30
- Buena Park 30
- Camp Nelson 30
- Camp Pendleton North 30
- Casa de Oro-Mount Helix 30
- Chula Vista 30
- Coalinga 30
- Crest 30
- Davis 30
- Desert Shores 30
- Durham 30
- Eldridge 30
- Eucalyptus Hills 30
- Fairbanks Ranch 30
- Granite Hills 30
- Harbison Canyon 30
- Imperial Beach 30
- Jamul 30
- La Jolla Shores 30
- La Presa 30
- Laguna Niguel 30
- Lake Forest 30
- Marysville 30
- Menifee 30
- Millbrae 30
- Mira Mesa 30
- National City 30
- Nice 30
- Norwalk 30
- Nuevo 30
- Patterson 30
- Quail Valley 30
- Rancho San Diego 30
- Romoland 30
- Roseland 30
- San Diego 30
- Sedco Hills 30
- Sheridan 30
- Sorrento Valley 30
- South Yuba City 30
- Sun City 30
- Tierra Buena 30
- Wildomar 30
- Winter Gardens 30
- Woodland 30
- Alamo 29
- Bass Lake 29
- Bayview 29
- Bonsall 29
- Byron 29
- Camp Meeker 29
- Cutten 29
- Discovery Bay 29
- El Verano 29
- Elverta 29
- Fillmore 29
- Green Acres 29
- Green Valley 29
- Hidden Meadows 29
- Homeland 29
- Humboldt Hill 29
- Irvine 29
- Lebec 29
- Linda 29
- Maxwell 29
- Murrieta Hot Springs 29
- Myrtletown 29
- Napa 29
- Oceano 29
- Olivehurst 29
- Pine Hills 29
- Rainbow 29
- Rancho Cordova 29
- Rio Dell 29
- San Diego Country Estates 29
- San Jose 29
- San Marcos 29
- Santa Paula 29
- Santa Rosa 29
- Shasta Lake 29
- Sonoma 29
- Tracy 29
- Upper Lake 29
- Walnut Creek 29
- Winchester 29
- Yountville 29
- Yuba City 29
- Aguanga 28
- Arden-Arcade 28
- Carmichael 28
- Concord 28
- Descanso 28
- East Hemet 28
- Encinitas 28
- Ford City 28
- Hughson 28
- Julian 28
- Ladera Ranch 28
- McCloud 28
- Miramonte 28
- Oak Hills 28
- Oasis 28
- Penngrove 28
- Rancho Palos Verdes 28
- San Pasqual 28
- Santa Barbara 28
- Saranap 28
- Stonyford 28
- Trona 28
- Valle Vista 28
- Vine Hill 28
- Waldon 28
- Barstow Heights 27
- Bay Point 27
- Beale Air Force Base 27
- Benicia 27
- Brooktrails 27
- Contra Costa Centre 27
- Dana Point 27
- Elk Grove 27
- Healdsburg 27
- Huron 27
- Idyllwild 27
- June Lake 27
- King City 27
- Lenwood 27
- Long Beach 27
- Maricopa 27
- Merced 27
- Montalvin 27
- North Fork 27
- Pine Valley 27
- Plumas Lake 27
- Sacramento 27
- San Andreas 27
- South Taft 27
- Taft Heights 27
- Tara Hills 27
- Winters 27
- Yolo 27
- Ashland 26
- Big Bear City 26
- Brentwood 26
- Cabazon 26
- Carpinteria 26
- Fairfield 26
- Fruitridge Pocket 26
- Garnet 26
- Hesperia 26
- Hollister 26
- Indian Wells 26
- Ione 26
- Isla Vista 26
- Kerman 26
- Lafayette 26
- Loma Rica 26
- Modesto 26
- Monte Sereno 26
- Moraga 26
- North Richmond 26
- Oakland 26
- Oakley 26
- Orinda 26
- Pacheco 26
- Paso Robles 26
- Petaluma 26
- Pittsburg 26
- Rancho Mirage 26
- Rio Linda 26
- Rollingwood 26
- San Lorenzo 26
- Temecula 26
- Vallejo 26
- Vista Santa Rosa 26
- Wasco 26
- Windsor 26
- Alameda 25
- Antioch 25
- Bermuda Dunes 25
- Cherryland 25
- Citrus Heights 25
- Clayton 25
- Desert Edge 25
- Desert Hot Springs 25
- Dirty Socks 25
- East Foothills 25
- El Rio 25
- Emeryville 25
- Firebaugh 25
- Folsom 25
- Foster City 25
- Freedom 25
- Gerber 25
- Gualala 25
- Hume 25
- Lake San Marcos 25
- Lincoln 25
- Morongo Valley 25
- Palermo 25
- Piedmont 25
- Roseville 25
- Saticoy 25
- Thousand Palms 25
- Ukiah 25
- Alta Sierra 24
- Berkeley 24
- Buena Vista 24
- Burlingame 24
- Calistoga 24
- Channel Islands Beach 24
- Corralitos 24
- Cuyama 24
- Diablo 24
- East Oakdale 24
- Hamilton City 24
- Lakewood 24
- McKinleyville 24
- Meiners Oaks 24
- Mira Monte 24
- Mission Viejo 24
- Morgan Hill 24
- Ojai 24
- Perris 24
- Pinole 24
- Pleasant Hill 24
- Rodeo 24
- San Clemente 24
- San Martin 24
- Sleepy Hollow 24
- Wheatland 24
- Woodbridge 24
- Albany 23
- Brea 23
- Cambrian Park 23
- Cameron Park 23
- Caspar 23
- Cotati 23
- Del Rey Oaks 23
- El Dorado Hills 23
- El Sobrante 23
- Emerald Lake Hills 23
- Esparto 23
- Fair Oaks 23
- Klamath 23
- Laguna Beach 23
- Los Gatos 23
- Manteca 23
- Martinez 23
- Mesa Verde 23
- Palm Springs 23
- Red Bluff 23
- Redwood Valley 23
- Ridgemark 23
- Ripon 23
- Rocklin 23
- Rolling Hills Estates 23
- Saint Helena 23
- San Juan Bautista 23
- Seven Trees 23
- Sky Valley 23
- Suisun 23
- Taft 23
- Toro Canyon 23
- Visitacion Valley 23
- Yuba 23
- Yucca Valley 23
- Amesti 22
- Aptos Hills-Larkin Valley 22
- Aromas 22
- Boronda 22
- Callender 22
- Castroville 22
- Cayucos 22
- Chualar 22
- Coleville 22
- Gilroy 22
- Glenn 22
- Gonzales 22
- Graeagle 22
- Grover Beach 22
- Interlaken 22
- Joshua Tree 22
- Ladera 22
- Lake Nacimiento 22
- Larkfield-Wikiup 22
- Las Lomas 22
- Lompico 22
- Loomis 22
- Los Alamos 22
- Mission Hills 22
- Mount Shasta 22
- Noe Valley 22
- Oakhurst 22
- Oroville 22
- Pajaro 22
- Redwood Shores 22
- Rio Del Mar 22
- Riverdale 22
- Rohnert Park 22
- Rough and Ready 22
- San Miguel 22
- Seacliff 22
- Seal Beach 22
- Sisquoc 22
- Summerland 22
- Vacaville 22
- Vandenberg Air Force Base 22
- Willits 22
- Yosemite Valley 22
- Acalanes Ridge 21
- Anderson 21
- Angels Camp 21
- Bertsch-Oceanview 21
- Bishop 21
- Broadmoor 21
- Carmel Valley Village 21
- Central Valley (historical) 21
- Chowchilla 21
- Cloverdale 21
- Colfax 21
- Colma 21
- Davenport 21
- Day Valley 21
- Del Mar 21
- Diamond Springs 21
- East Richmond Heights 21
- Forest Meadows 21
- Grass Valley 21
- Happy Camp 21
- Keeler 21
- Kensington 21
- Kentfield 21
- La Jolla 21
- Lake of the Pines 21
- Marin City 21
- Mill Valley 21
- Montague 21
- Monterey 21
- Mount Hermon 21
- Mountain Ranch 21
- Newcastle 21
- Newport Beach 21
- Novato 21
- Olancha 21
- Opal Cliffs 21
- Orangevale 21
- Pasatiempo 21
- Port Hueneme 21
- Redding 21
- Richmond 21
- San Bruno 21
- San Carlos 21
- San Francisco 21
- Shasta 21
- South San Francisco 21
- Susanville 21
- Thermalito 21
- Turlock 21
- Twin Lakes 21
- Weed 21
- Ahwahnee 20
- Angwin 20
- Atwater 20
- Auberry 20
- Auburn Lake Trails 20
- Ben Lomond 20
- Berry Creek 20
- Borrego Springs 20
- Bridgeport 20
- Butte 20
- Campo 20
- Chico 20
- Cottonwood 20
- Daly City 20
- Dixon 20
- Downey 20
- East Sonora 20
- El Granada 20
- Elkhorn 20
- Gold River 20
- Granite Bay 20
- Huntington Beach 20
- Janesville 20
- Kelseyville 20
- Kelso 20
- Kirkwood 20
- Lakehead-Lakeshore 20
- Larkspur 20
- Live Oak 20
- Lone Pine 20
- Los Banos 20
- Magalia 20
- Meadow Vista 20
- Middletown 20
- Palo Cedro 20
- Penn Valley 20
- Pine Grove 20
- Pioneer 20
- Placerville 20
- Plumas 20
- Plymouth 20
- Ross 20
- Salinas 20
- San Joaquin Hills 20
- Santa Cruz 20
- Santa Venetia 20
- Sebastopol 20
- Soquel 20
- Trabuco Canyon 20
- Trinity 20
- Warner Springs 20
- Wrightwood 20
- Auburn 19
- Avalon 19
- Big River 19
- Black Point-Green Point 19
- Blue Lake 19
- Bodega Bay 19
- Bonny Doon 19
- Camino 19
- Carnelian Bay 19
- Corte Madera 19
- Crestline 19
- Dixon Lane-Meadow Creek 19
- Georgetown 19
- Guerneville 19
- Half Moon Bay 19
- Hayfork 19
- Hercules 19
- Highlands-Baywood Park 19
- Hydesville 19
- Jackson 19
- Jamestown 19
- Laguna 19
- Lagunitas-Forest Knolls 19
- Lake Arrowhead 19
- Lewiston 19
- Los Molinos 19
- Lucas Valley-Marinwood 19
- Mammoth Lakes 19
- Marina 19
- Montecito 19
- Nevada City 19
- Oakdale 19
- Orland 19
- Pacific Grove 19
- Portola 19
- Quartz Hill 19
- San Rafael 19
- Santa Ynez 19
- Sausalito 19
- Sea Ranch 19
- Seaside 19
- Shaver Lake 19
- Stockton 19
- Tamalpais-Homestead Valley 19
- Tamalpais Valley 19
- Tehachapi 19
- Tiburon 19
- Weaverville 19
- West Sacramento 19
- Aptos 18
- Arcata 18
- Bella Vista 18
- Belmont 18
- Big Bear Lake 18
- Big Pine 18
- Carmel-by-the-Sea 18
- Challenge-Brownsville 18
- Coarsegold 18
- Covelo 18
- El Cerrito 18
- El Dorado 18
- Ferndale 18
- Fetters Hot Springs-Agua Caliente 18
- Graton 18
- Hidden Valley Lake 18
- Hillsborough 18
- Hoopa 18
- Hornbrook 18
- Inyo 18
- La Selva Beach 18
- Laguna Woods 18
- Mendocino 18
- Mission District 18
- Murphys 18
- Needles 18
- Olympic Valley 18
- Pacifica 18
- Paradise 18
- Phoenix Lake 18
- Potter Valley 18
- Prunedale 18
- Red Corral 18
- San Anselmo 18
- San Mateo 18
- Santa Margarita 18
- Scotts Valley 18
- Shingle Springs 18
- Sutter Creek 18
- Tahoe Vista 18
- Woodacre 18
- Yreka 18
- Alpine 17
- Arbuckle 17
- Arnold 17
- Belvedere 17
- Bill Stanley 17
- Boulder Creek 17
- Calimesa 17
- Cathedral City 17
- Cool 17
- Copperopolis 17
- Gasquet 17
- Guadalupe 17
- Idyllwild-Pine Cove 17
- Johnstonville 17
- La Grange 17
- Lucerne 17
- Mariposa 17
- Placer 17
- Point Arena 17
- Pollock Pines 17
- Quincy 17
- Rancho Murieta 17
- Rancho Santa Fe 17
- Redway 17
- Sonora 17
- Soulsbyville 17
- Temelec 17
- Tulelake 17
- Tuolumne City 17
- Williams 17
- Willow Creek 17
- Alturas 16
- Bayside 16
- Bolinas 16
- Carmel Valley 16
- Cedar Ridge 16
- Cobb 16
- Columbia 16
- Dunsmuir 16
- East Quincy 16
- Eastvale 16
- Felton 16
- Forest Ranch 16
- Foresthill 16
- Forestville 16
- Humboldt 16
- Inverness 16
- Laytonville 16
- Los Olivos 16
- Macdoel 16
- Marin 16
- Montara 16
- Nipomo 16
- North Auburn 16
- Rancho Tehama Reserve 16
- Running Springs 16
- Scotia 16
- Shingletown 16
- Truckee 16
- Tuolumne 16
- Willows 16
- Buckhorn 15
- Corning 15
- Deer Park 15
- Eureka 15
- Fairfax 15
- Fortuna 15
- Lakeport 15
- Loyalton 15
- Moss Beach 15
- Occidental 15
- Solana Beach 15
- South Lake Tahoe 15
- Thermal 15
- Twain Harte 15
- Watsonville 15
- Amador 14
- Dollar Point 14
- Fort Bragg 14
- Lexington Hills 14
- Mono 14
- Mono Vista 14
- Nevada County 14
- Orcutt 14
- Orleans 14
- Rancho Calaveras 14
- Spring Valley 14
- Tahoe City 14
- Tahoma 14
- Tehama 14
- Vandenberg Village 14
- Westhaven-Moonstone 14
- Arroyo Grande 13
- Ceres 13
- Crescent City 13
- Downieville 13
- Lower Lake 13
- North Lakeport 13
- Siskiyou 13
- Soledad 13
- Solvang 13
- Strawberry 13
- West Bishop 13
- Atascadero 12
- Boonville 12
- Calaveras 12
- Galt 12
- Greenville 12
- Lee Vining 12
- Midpines 12
- Paicines 12
- San Juan Capistrano 12
- San Luis Obispo 12
- Clearlake 11
- Del Monte Forest 11
- Lompoc 11
- Monte Rio 11
- Santa Maria 11
- Sierra 11
- Brookdale 10
- Buellton 10
- Costa Mesa 10
- Lake Wildwood 10
- Mission Canyon 10
- San Benito 10
- Sunnyside-Tahoe City 10
- Nashville 9
- Pismo Beach 9
- Leona Valley 8
- Kings Beach 7
- Templeton 7
- Wilton 7
- Cambria 6
- Yosemite Lakes 6
- Los Osos 5
- Oroville East 4
- Capitola 3
- Chester 3
- Avila Beach 2
- Anza 0
AQI US, Metric