What is the air quality like in Fresno?
Fresno has an average AQI of 89, which falls in the "Moderate" category. About 22% of days have Good air quality, 40% are Moderate, and 25% are Unhealthy for Sensitive Groups. The primary pollutant is PM2.5.
What is the main pollutant in Fresno?
The primary pollutant in Fresno is PM2.5. The city's average PM2.5 level is 16.8 μg/m³ (above the EPA annual standard of 12 μg/m³). Average ozone levels are 59 ppb. Major pollution sources include agriculture, wildfires, vehicles.
Is Fresno affected by wildfire smoke?
Fresno has a very high wildfire risk rating. Wildfire smoke frequently degrades air quality, sometimes pushing AQI into unhealthy ranges for extended periods.
How many good air quality days does Fresno have?
Approximately 22% of days in Fresno have Good air quality (AQI 0-50). This is below the national average, meaning residents frequently experience reduced air quality.
When is pollen season in Fresno'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.