What is the air quality like in Ontario?
Ontario has an average AQI of 78, which falls in the "Moderate" category. About 32% of days have Good air quality, 42% are Moderate, and 20% are Unhealthy for Sensitive Groups. The primary pollutant is Ozone.
What is the main pollutant in Ontario?
The primary pollutant in Ontario is Ozone. The city's average PM2.5 level is 13.5 μg/m³ (above the EPA annual standard of 12 μg/m³). Average ozone levels are 56 ppb. Major pollution sources include airport, logistics, vehicles.
Is Ontario affected by wildfire smoke?
Ontario has a high wildfire risk rating. Wildfire smoke regularly impacts air quality, especially during summer and fall fire seasons.
How many good air quality days does Ontario have?
Approximately 32% of days in Ontario 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 Ontario'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.