What is the air quality like in St. Louis?
St. Louis has an average AQI of 58, which falls in the "Moderate" category. About 50% of days have Good air quality, 36% are Moderate, and 12% are Unhealthy for Sensitive Groups. The primary pollutant is PM2.5.
What is the main pollutant in St. Louis?
The primary pollutant in St. Louis is PM2.5. The city's average PM2.5 level is 10.5 μg/m³ (below the EPA annual standard of 12 μg/m³). Average ozone levels are 46 ppb. Major pollution sources include vehicles, industry, river barges.
Is St. Louis affected by wildfire smoke?
St. Louis has a low wildfire risk rating. Wildfire smoke rarely impacts air quality here.
How many good air quality days does St. Louis have?
Approximately 50% of days in St. Louis have Good air quality (AQI 0-50). Residents experience Good air quality about half the time, with other days being Moderate or worse.
What about allergies in St. Louis?
Air quality and pollen counts can both affect respiratory health in St. Louis. On days with higher AQI levels, allergy symptoms may worsen. Using a HEPA air purifier indoors and monitoring both AQI and pollen counts can help manage symptoms.