What is the air quality like in San Diego?
San Diego has an average AQI of 52, which falls in the "Moderate" category. About 58% of days have Good air quality, 33% are Moderate, and 8% are Unhealthy for Sensitive Groups. The primary pollutant is Ozone.
What is the main pollutant in San Diego?
The primary pollutant in San Diego is Ozone. The city's average PM2.5 level is 9.1 μg/m³ (below the EPA annual standard of 12 μg/m³). Average ozone levels are 45 ppb. Major pollution sources include vehicles, cross-border pollution.
Is San Diego affected by wildfire smoke?
San Diego has a moderate wildfire risk rating. Occasional wildfire smoke events may temporarily degrade air quality.
How many good air quality days does San Diego have?
Approximately 58% of days in San Diego have Good air quality (AQI 0-50). Residents experience Good air quality about half the time, with other days being Moderate or worse.
When is pollen season in San Diego's state (CA)?
Pollen seasons in CA include: Grass Pollen (April–July, High severity); Tree Pollen (February–May, High severity); Weed Pollen (July–November, Moderate severity); Mold Spores (Year-round–Year-round, Moderate severity). Allergy sufferers should monitor pollen counts during these periods and consider staying indoors on high-pollen days, especially during morning hours when counts peak.