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AQI 152: How Bad Is It and What Should You Do?

Yes. On the U.S. Air Quality Index (AQI), 152 falls in the “Unhealthy” range of 151–200, meaning anyone may experience health effects and people in sensitive groups may experience more serious effects. It is just above the “Unhealthy for Sensitive Groups” range of 101–150, but that change in category is a useful prompt to reduce your exposure.

Consider moving a long run, yard project, or other strenuous outdoor activity indoors, especially if you have asthma, heart or lung disease, or symptoms such as coughing or shortness of breath. If you need to go out, keep the trip brief and pay attention to local air-quality alerts, which can identify the pollutant driving the reading and offer more specific guidance.
Check the product’s listed specifications when evaluating what should you do when the aqi is 152.

Featured in this guide
Breathe Better Indoors, Live Better: A Practical Guide to Improving Indoor Air Quality
When outdoor pollution is the problem, close windows and doors and run an appropriately sized portable air cleaner with a particle filter, or use a compatible HVAC filter if your system supports one. Avoid adding indoor pollution through smoking, burning candles, or frying without ventilation; when outdoor air improves, you can ventilate to help clear pollutants generated inside.
Not necessarily: the reported AQI usually describes outdoor conditions, while your indoor air also depends on ventilation, filtration, and sources inside your home. Our team’s Breathe Better Indoors, Live Better: A Practical Guide to Improving Indoor Air Quality is a starting point for thinking through those room-by-room factors; you can also read our indoor air quality guide.
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At an AQI of 151 or higher, reducing time outdoors—particularly strenuous activity—is a sensible precaution for everyone. If you are in a sensitive group, consider limiting prolonged or heavy outdoor exertion starting at 101, and follow advice from your health care professional for your circumstances.
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