Worst air pollution Little Italy San Diego - San Diego, today and tomorrow
Today (9 August): Air quality in Little Italy San Diego is fair. AQI, PM10, and O3 are fair; PM2.5, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 AM (PM10: 24.9/100).
Tomorrow (10 August 2026): Air quality in Little Italy San Diego is fair. PM10 decreases to good; all other pollutants stay as today. Pollution peaks around 10:00 AM (O3: 21.0/100). Airmine updates local air quality forecasts four times daily.
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San Diego's Little Italy air quality reflects the downtown waterfront neighbourhood, with vehicle traffic on India Street and the San Diego Bay's maritime activity contributing local sources. The bay's consistent maritime ventilation provides reliable background air quality management, while the neighbourhood's compact walkable character and the outstanding Pacific and bay coastal exposure generally maintain Little Italy among San Diego's more moderately ventilated downtown neighbourhoods throughout most of the year.
Today - 9 August | Pollution peaks at 04:00
AQI:
Fair
24.9/100
PM2.5 (fine particles):
Good
17.2/100
PM10 (coarse particles):
Fair
24.9/100
NO2 (nitrogen dioxide):
Good
2.0/100
O3 (ozone):
Fair
22.8/100
SO2 (sulfur dioxide):
Good
1.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.0/100
PM1 (ultrafine particles):
Good
5.7/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 10:00
AQI:
Fair
21.0/100
PM2.5 (fine particles):
Good
16.3/100
PM10 (coarse particles):
Good
18.1/100
NO2 (nitrogen dioxide):
Good
4.1/100
O3 (ozone):
Fair
21.0/100
SO2 (sulfur dioxide):
Good
1.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.2/100
PM1 (ultrafine particles):
Good
6.0/100
Other Landmarks in San Diego
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Frequently Asked Questions
Is air quality bad in Little Italy San Diego right now?
On 9 August 2026, overall air quality in Little Italy San Diego is fair. AQI is the main air quality indicator at 24.9/100. Pollution peaks around 4:00 AM (PM10: 24.9/100).
Will air quality be worse tomorrow in Little Italy San Diego?
On 10 August 2026, air quality conditions in Little Italy San Diego will be similar to today, with AQI forecast at fair at 21.0/100. Pollution peaks around 10:00 AM (O3: 21.0/100).
When is air pollution at its worst in Little Italy San Diego?
Like the rest of San Diego, Little Italy San Diego sees air quality change through the year. Typically, winter typically brings the cleanest stretch, once occasional rain clears the basin, while from August into October, wildfire smoke can add sharp particulate spikes on top of the usual summer ozone. The mountains ringing the basin can trap pollution close to the ground for days when winds are calm.
Are air quality levels in Little Italy San Diego 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.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 10 August 2026 at 02:34 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.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
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