Air Pollution in California: Real-time Air Quality Index Visual Map

Unhealthy for sensitive groups
Very Unhealthy
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Air Quality Index (AQI) Values

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The GAIA air quality monitoring stations are using high-tech laser particle sensors to measure in real-time PM2.5 pollution, which is one of the most harmful air pollutants.

Very easy to set up, they only require a WIFI access point and a USB power supply. Once connected, air pollution levels are reported instantaneously and in real-time on our maps

Stations on the map

There are 116 stations on the map: Bakersfield-California Avenue, Kern, California (97) - Lake Gregory (Crestline), San Bernardino (69) - Redwood City, San Mateo, California (65) - San Jose-Knox Avenue, Santa Clara, California (65) - Mexicali-UABC, Mexicali, California (65) - San Pablo-Rumrill, Contra Costa, California (65) - Yuba City, Sutter, California (64) - Oakland-Laney College, Alameda, California (61) - CDF - Arroyo Grande, San Luis Obispo, California (61) - Santa Cruz - Soquel Avenue, Santa Cruz, California (61) - North Hollywood, Los Angeles, California (60) - San Francisco-Arkansas Street, San Francisco, California (59) - Calexico-Ethel Street, Imperial, California (58) - Oakland - East, Alameda, California (57) - Banning-Airport, Riverside (57) - Modesto-14th Street, Stanislaus, California (57) - Santa Clarita-Placerita, Los Angeles (56) - Victorville - Park Avenue, San Bernardino, California (56) - Thousand Oaks-Moorpark Road, Ventura, California (55) - Camp Pendleton, San Diego, California (55) - Vallejo, Solano, California (55) - El Cajon-Redwood Avenue, San Diego, California (55) - Nipomo-Guadalupe Road, San Luis Obispo, California (55) - Concord, Contra Costa, California (55) - El Cajon-Lexington Elementary School, San Diego, California (55) - Reseda, Los Angeles (54) - Los Angeles-North Main Street (54) - King City - Pearl, Monterey, California (53) - Ukiah - Library, Mendocino, California (53) - Hollister-Fairview Road, San Benito, California (53) - San Jose - Jackson St, Santa Clara, California (53) - San Diego - Sherman Elementary School, San Diego, California (52) - Ontario-Route 60 Near Road, San Bernardino, California (52) - Alpine-Victoria Drive, San Diego, California (51) - Lancaster-Division Street, Los Angeles, California (50) - El Rio-Rio Mesa School #2, Ventura, California (50) - Pleasanton-Owens Ct, Alameda, California (50) - San Rafael, Marin, California (50) - Springville-Forest Service, Tulare, California (48) - Corcoran-Patterson Avenue, Kings, California (48) - Glendora-Laurel, Los Angeles (47) - Elk Grove - Bruceville Road, Sacramento, California (46) - Simi Valley - Cochran Street, Ventura, California (46) - Sebastopol-103 Morris Street, Sonoma, California (46) - San Lorenzo Valley Middle School, Santa Cruz, California (46) - Rio Vista-St Francis Way, Solano, California (46) - Porterville, Tulare, California (46) - Rio Vista-YS, Solano, California (46) - Sebastopol, Sonoma, California (46) - Goleta-Fairview, Santa Barbara, California (46) - Folsom-Natoma Street, Sacramento, California (45) - Joshua Tree NP - Cottonwood #2, Riverside, California (45) - Upland, San Bernardino (43) - Grass Valley-Litton Building, Nevada, California (43) - Oakland - West, Alameda, California (42) - Livermore - Rincon, Alameda, California (42) - Gilroy-9th Street, Santa Clara, California (42) - Atascadero Lift Station #5, San Luis Obispo, California (42) - Carmel Valley-Ford Road, Monterey, California (42) - Willows-Colusa, Glenn, California (42) - Atascadero-Lift Station #5, San Luis Obispo, California (42) - Ojai - East Ojai Av, Ventura, California (42) - Niland-English Road, Imperial, California (41) - Otay Mesa - Donovan Correctional Facility, San Diego, California (40) - Roseville-N Sunrise Ave, Placer, California (40) - Fresno - Drummond Street, Fresno, California (39) - Piru - Pacific, Ventura, California (38) - Hanford-S Irwin Street, Kings, California (38) - Turlock-S Minaret Street, Stanislaus, California (38) - Clovis-N Villa Avenue, Fresno, California (37) - Madera City, Madera, California (37) - Merced - Coffee Road, Merced, California (37) - Chico - East Avenue, Butte, California (36) - Lake Elsinore-W Flint Street, Riverside (36) - Anderson-North Street, Shasta, California (35) - Bishop-White Mountain Research Center, Inyo, California (35) - San Andreas-Gold Strike Road, Calaveras, California (35) - Westmorland, Imperial, California (35) - Keeler-Cerro Gordo Road, Inyo, California (34) - Manteca AMS, San Joaquin, California (34) - Salinas #3, Monterey, California (34) - Redding - Health Department, Shasta, California (34) - Davis-UCD Campus, Yolo, California (34) - Rubidoux - Mission Blvd, Riverside (33) - Lompoc-South H Street, Santa Barbara, California (33) - Woodland-Gibson Road, Yolo, California (32) - Madera - Pump Yard, Madera, California (32) - Sacramento - 1309 T Street, Sacramento, California (32) - Colfax-City Hall, Placer, California (31) - Anaheim-Loara School, Orange, California (31) - Pinehurst-Forest Service, Fresno, California (30) - Sequoia National Park-Ash Mountain, Tulare, California (30) - Sloughhouse, Sacramento, California (30) - Tahoe City-221 Fairway Drive, Placer, California (30) - Tracy - Airport, San Joaquin, California (30) - Colusa-Sunrise Blvd, Colusa, California (30) - Chester, Plumas, California (30) - Tranquility, Fresno, California (28) - Vacaville-Ulatis Drive, Solano, California (27) - Santa Barbara-National Guard Armory, Santa Barbara, California (26) - Portola - Gulling Street, Plumas, California (25) - Truckee - Fire Station, Nevada, California (25) - Fresno - Garland, Fresno, California (24) - Yosemite Village - Visitor Center, Mariposa, California (21) - Mammoth Lakes-Gateway HC, Mono, California (20) - Lebec, Kern, California (17) - Paradise - Theater, Butte, California (17) - Auburn - Atwood Rd, Placer, California (17) - Lincoln-2885 Moore Road, Placer, California (13) - Huron - 4th Street, Fresno, California (13) - Red Bluff - Walnut St, Tehama, California (13) - Quincy-N Church Street, Plumas, California (9) - Sacramento-Del Paso Manor, Sacramento, California (9) - Tahoe City - 221 Fairway Drive, Placer, California (5) - Gridley, Butte, California (5) - Long Beach-Route 710 Near Road, Los Angeles, California (no data)

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Air Quality Rankings

About the Air Quality and Pollution Measurement:

About the Air Quality Levels

AQIAir Pollution LevelHealth ImplicationsCautionary Statement (for PM2.5)
0 - 50GoodAir quality is considered satisfactory, and air pollution poses little or no riskNone
51 -100ModerateAir quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.
101-150Unhealthy for Sensitive GroupsMembers of sensitive groups may experience health effects. The general public is not likely to be affected.Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.
151-200UnhealthyEveryone may begin to experience health effects; members of sensitive groups may experience more serious health effectsActive children and adults, and people with respiratory disease, such as asthma, should avoid prolonged outdoor exertion; everyone else, especially children, should limit prolonged outdoor exertion
201-300Very UnhealthyHealth warnings of emergency conditions. The entire population is more likely to be affected.Active children and adults, and people with respiratory disease, such as asthma, should avoid all outdoor exertion; everyone else, especially children, should limit outdoor exertion.
300+HazardousHealth alert: everyone may experience more serious health effectsEveryone should avoid all outdoor exertion

To know more about Air Quality and Pollution, check the wikipedia Air Quality topic or the airnow guide to Air Quality and Your Health.

For very useful health advices of Beijing Doctor Richard Saint Cyr MD, check blog.

Usage Notice: All the Air Quality data are unvalidated at the time of publication, and due to quality assurance these data may be amended, without notice, at any time. The World Air Quality Index project has exercised all reasonable skill and care in compiling the contents of this information and under no circumstances will the World Air Quality Index project team or its agents be liable in contract, tort or otherwise for any loss, injury or damage arising directly or indirectly from the supply of this data.


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