When air pollution levels are high, a red alert warns the public of health dangers. Poor air quality is bad for us all. And it's an even greater risk for those with breathing issues. Poor air quality can trigger allergies and asthma attacks for millions of Americans. And air quality changes from day to day.

Fortunately, the Air Quality Index tracks and reports on the most common air pollutants controlled under the Clean Air Act. You can monitor your local air pollution daily. It’s easy to do. Just check www.airnow.gov/  for color-coded ratings in your area.

With that knowledge,  you can reduce your exposure — and risk — on high pollution days.

Create an Action Plan for High Pollution Days

If you need to go outside during high pollution days, it’s helpful to create an action plan — especially if you suffer from asthma or other breathing issues. During red and orange days, you should: 

• Limit or avoid outdoor exercise and activities.  
• Avoid going outdoors at times when air pollution is highest. This is typically from 11 a.m. to 8 p.m., says the Asthma and Allergy Foundation of America.
• Consider protective measures like wearing an N-95 mask outdoors.  
• Stay in a well-ventilated building, with air conditioning if possible.

Pay Attention to Local Environmental Triggers

Many communities are exposed to pollution. Nearby factories and power plants can release harmful chemicals into the air. Diesel exhaust fumes, agricultural burning, crop dusting and forest fires can make breathing difficult. In cities, triggers can include smog and vehicle exhaust.

All of these environmental triggers can provoke asthma or allergy symptoms and make breathing more difficult in general.

To reduce exposure, get educated about potential pollutants in your area. Pay attention to reports from local health departments and air pollution control agencies.

Improve Indoor Air Quality

Other than avoiding exposure on high pollution days, there isn’t much you can do about bad air quality outside. But you can improve the quality of air in your home:

• Dust regularly and keep carpets clean and dry.
• Make sure gas- and wood-burning appliances are properly installed, used, and maintained.
• Keep your humidifier clean.
• Be careful how you store and use household cleaners.
• If you use candles, consider safer options like beeswax or soy candles that don’t release chemicals when burning.
• Change your HVAC filter every three months.
• Watch for mold.

Learn more about keeping your indoor air quality safe  and protecting your lungs.

For children and adults alike, reducing exposure to harmful outdoor pollutants and keeping our indoor air clean can go a long way toward breathing easier.

Sources: Air Quality Index (AQI),  United States Environmental Protection Agency, 2025;  AirNow,  AirNow.gov; Air Pollution and Asthma,  Asthma and Allergy Foundation of America, 2024; 10 Tips to Protect Yourself From Unhealthy Air,  American Lung Association, 2024; Indoor Air Can Cause Health Problems,  University of Rochester Medical Center; Indoor Air Quality House Tour,  EPA, 2025