Worst air pollution Carlsbad, today and tomorrow
Today (15 July): Air quality in Carlsbad is fair. AQI, PM10, and O3 are fair; PM2.5, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 7:00 AM (O3: 28.3/100).
Tomorrow (16 July 2026): Air quality in Carlsbad is fair. All pollutants stay as today. Pollution peaks around 8:00 AM (O3: 28.9/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Carlsbad's air quality benefits from direct Pacific Ocean coastal exposure on the San Diego County coast, with consistent onshore sea breezes providing reliable maritime ventilation. Vehicle emissions from I-5 and the surrounding biotechnology campus corridor are the primary local sources, while the coastal position provides significantly better conditions than the inland San Diego County valleys throughout most of the year.
Today - 15 July | Pollution peaks at 07:00
AQI:
Fair
28.3/100
PM2.5 (fine particles):
Good
17.4/100
PM10 (coarse particles):
Fair
28.0/100
NO2 (nitrogen dioxide):
Good
0.7/100
O3 (ozone):
Fair
28.3/100
SO2 (sulfur dioxide):
Good
1.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
3.1/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 08:00
AQI:
Fair
28.9/100
PM2.5 (fine particles):
Good
12.8/100
PM10 (coarse particles):
Fair
22.0/100
NO2 (nitrogen dioxide):
Good
1.0/100
O3 (ozone):
Fair
28.9/100
SO2 (sulfur dioxide):
Good
1.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
2.8/100
Pollen forecast in Carlsbad
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Frequently Asked Questions
Is air quality bad in Carlsbad right now?
On 15 July 2026, overall air quality in Carlsbad is fair. AQI is the main air quality indicator at 28.3/100. Pollution peaks around 7:00 AM (O3: 28.3/100).
Will air quality be worse tomorrow in Carlsbad?
On 16 July 2026, air quality conditions in Carlsbad will be similar to today, with AQI forecast at fair at 28.9/100. Pollution peaks around 8:00 AM (O3: 28.9/100).
When is air pollution at its worst in Carlsbad?
Air quality across Carlsbad rises and falls with the seasons. In short, winter rains provide the only real relief from an otherwise persistent haze, whereas summer and early autumn bring the highest ozone levels, and wildfire smoke can spike particulate readings sharply from August through October. Coastal breezes offer some relief compared to inland valley locations that see heavier smog buildup.
Are air quality levels in Carlsbad based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
For long term forecasts and maps, see the Airmine app