Active Air Quality Alerts
Real-time air quality alerts for US cities. Monitor current health advisories, understand risks, and get safety recommendations for your area.
Unhealthy for Sensitive Groups
2 cities - Sensitive groups should limit outdoor activities
Sensitive Groups
These groups are most at risk during poor air quality and should take precautions first:
- Children and TeenagersDeveloping lungs are more vulnerable to pollution
- Adults 65 and OlderAge-related vulnerabilities increase risk
- People with Asthma or COPDPre-existing respiratory conditions worsen
- People with Heart DiseaseCardiovascular stress increases with pollution
- Pregnant WomenProtect both maternal and fetal health
Recommended Actions by Alert Level
- • Sensitive groups limit prolonged outdoor activity
- • Watch for symptoms like coughing or shortness of breath
- • Everyone should reduce prolonged outdoor exertion
- • Sensitive groups should avoid outdoor activities
- • Keep windows closed, use air conditioning
- • Everyone should avoid outdoor activities
- • Stay indoors with air filtration
- • Wear N95 masks if you must go outside
- • Everyone should remain indoors
- • Run air purifiers continuously
- • Evacuate if possible
Related Resources
About Air Quality Alerts
Air quality alerts are based on real-time AQI data from EPA monitoring stations via the AirNow network. Alerts are categorized by EPA standards: Moderate (51-100), Unhealthy for Sensitive Groups (101-150), Unhealthy (151-200), Very Unhealthy (201-300), and Hazardous (301+). Data updates every 30 minutes to provide the most current health advisories. When AQI exceeds 100, sensitive groups should take precautions. When AQI exceeds 150, everyone should limit outdoor exposure.