Outdoor Event Planning
Planning outdoor events based on air quality conditions.
What AQI is safe for outdoor events?
Outdoor events are safe to hold when the AQI is under 100. An AQI of 0–50 (Good) is ideal, and 51–100 (Moderate) is generally fine — offer sensitive attendees shade, seating, and a way to step inside. From 101–150 (Unhealthy for Sensitive Groups), provide indoor areas and advise vulnerable guests to limit exertion; above 150 (Unhealthy), consider postponing, shortening, or moving the event indoors, since crowds include children, older adults, and people with asthma who are most affected.
- ✓0–50 (Good): ideal conditions for any outdoor event.
- ✓51–100 (Moderate): generally fine; give sensitive attendees shade, seating, and an indoor option.
- ✓101–150 (Unhealthy for Sensitive Groups): offer indoor areas; advise vulnerable guests to limit exertion.
- ✓151+ (Unhealthy and above): consider postponing, shortening, or moving the event indoors.
Frequently asked questions
What AQI is safe for outdoor events?▾
AQI 0–50 (Good) is ideal for outdoor events, and 51–100 (Moderate) is generally safe — provide shade, seating, and an easy indoor option for sensitive attendees. From AQI 101–150 (Unhealthy for Sensitive Groups), make indoor areas available and advise children, older adults, and people with asthma or heart conditions to limit exertion. At AQI 151 and above (Unhealthy), consider postponing, shortening, or moving the event indoors.
Should an outdoor event be cancelled for poor air quality?▾
Below AQI 100 an event can generally proceed as planned. Between 101 and 150, keep it running but add indoor refuge space and reduce strenuous programming. Once the AQI reaches 151 (Unhealthy), seriously weigh postponing or relocating indoors, because event crowds always include vulnerable people. Build the decision into your plan ahead of time by setting AQI thresholds and checking the same-day forecast, especially during wildfire season when smoke can arrive quickly.
What is the best time of day to schedule an outdoor event for cleaner air?▾
Morning events typically see the best air quality, before traffic builds and before afternoon sun drives ground-level ozone formation. Evening is a good second option as ozone dissipates after sunset. Midday to late afternoon in summer is the riskiest window for ozone, so schedule intensive or long outdoor programming for the cooler parts of the day.
Gear for exercising in poor air
At AQI 101, the air outside is already in the range where hard breathing pulls in more pollution. If you're heading outdoors anyway, two pieces of gear do more than anything indoors:
Wear a mask when exercising in poor air — a snug N95/KN95 filters the PM2.5 and wildfire smoke that mouth-breathing drives deep into your lungs. (Masks do little against ozone, a gas.)
Shop N95 / KN95 Masks on Amazon →Check the air where you actually are — a pocket PM2.5 monitor reads your street, trail or field, which can be far worse (or better) than the nearest official station miles away.
Shop Portable AQ Monitors on Amazon →As an Amazon Associate, we earn from qualifying purchases at no extra cost to you.
Air Quality Guidelines for Outdoor
When exercising or working outdoors, you breathe faster and deeper, potentially inhaling more air pollution. Knowing when it is safe to be active outdoors is crucial for your health.
When to Exercise/Work Outdoors
- AQI 0-50 (Good): Safe for all activities
- AQI 51-100 (Moderate): Generally safe, sensitive individuals take caution
- AQI 101-150 (Unhealthy for Sensitive): Reduce intense activities
- AQI 151+ (Unhealthy): Avoid prolonged outdoor exertion
Planning around poor air quality? Keep your indoor spaces clean too:
Protect Your Indoor Air
With an AQI of 101 driven by fine particulate matter (PM2.5), outdoor pollution is seeping indoors. A True-HEPA purifier captures up to 99.97% of the PM2.5, wildfire smoke and fine particles behind this reading. On unhealthy days like today, size up to a higher-CADR unit so it can clear the whole living area quickly.
Compare top-rated True-HEPA purifiers:
Prices are approximate and subject to change. As an Amazon Associate, we earn from qualifying purchases at no extra cost to you.
Best Times of Day
Early morning typically has the best air quality before traffic builds up and ozone forms. Evening can also be good once ozone decreases after sunset.
Protection Tips
- Check the AQI before heading outdoors
- Choose routes away from busy roads when possible
- Consider wearing an N95 mask on poor air quality days
- Move activities indoors when AQI is elevated
Where outdoor event planning is hardest on your lungs right now
The five monitored US cities with the highest Air Quality Index in our latest EPA AirNow snapshot. If you are planning outdoor event planning in or near one of these, check the city page (and the live AirNow reading) before you go.
| # | City | AQI | Category | Main pollutant | Observed |
|---|---|---|---|---|---|
| 1 | Fresno, CA | 87 | Moderate | PM2.5 | 9:00 AM PST on November 8, 2026 |
| 2 | Sacramento, CA | 75 | Moderate | PM2.5 | 9:00 AM PST on November 8, 2026 |
| 3 | Bakersfield, CA | 71 | Moderate | PM2.5 | 9:00 AM PST on November 8, 2026 |
| 4 | Macon, GA | 71 | Moderate | PM2.5 | 12:00 PM EST on November 8, 2026 |
| 5 | Visalia, CA | 66 | Moderate | PM2.5 | 9:00 AM PST on November 8, 2026 |
Source: EPA AirNow (files.airnowtech.org reportingarea.dat). This snapshot was taken when the site was last built (Nov 8, 2026, 5:35 PM UTC); AQI changes hourly, so treat this as a starting point, not a live reading. Covers 147 of 149 tracked cities.