AQI Detail Page
AQI 25: cigarette equivalent, interpretation, and what to do next
At AQI 25, a full day of exposure is roughly equivalent to smoking 0.27 cigarettes. The point of this page is not just the number. It is helping you decide how much of your routine should change.
AQI category
Good
PM2.5 estimate
6
µg/m³
Daily equivalent
0.27
cigarettes / 24h
If repeated daily
8.1
cigarettes / 30 days
What AQI 25 means
Short outdoor activity is generally low risk when AQI stays in this range.
People with asthma or smoke sensitivity should still watch for symptoms if the air smells smoky.
Exposure framing
1 hour: about 0.01 cigarettes.
2 hours: about 0.02 cigarettes.
24 hours: about 0.27 cigarettes.
7 repeated days: about 1.9 cigarettes.
Scenario guidance at AQI 25
These are the kinds of day-to-day decisions users commonly make from this reading.
Commute or errands
Good to go2 hours equals 0.02 cigarettes at AQI 25.
A short outdoor trip is usually manageable, but keep an eye on trends.
Outdoor exercise
Good to go1 hour equals 0.01 cigarettes at AQI 25.
Most people can train outdoors normally.
Kids, school, or playground time
Good to go3 hours equals 0.03 cigarettes at AQI 25.
Normal play is usually fine if children are not symptomatic.
Sleeping with windows open
Good to go8 hours equals 0.09 cigarettes at AQI 25.
Ventilation is usually acceptable if the air stays in this range.
Why the estimate is credible
The site first converts AQI into an estimated PM2.5 concentration and then applies Berkeley Earth's cigarette-equivalence framing.
The estimate is most useful for comparing air-quality dose across times, situations, and repeated days. It should not be treated as a literal smoking-equivalence medical claim.
View next
Commute exposure planner
Use AQI to decide whether a daily commute is routine, cautionary, or worth changing.
Outdoor exercise risk guide
Translate AQI into a clear decision for running, cycling, or training outside.
Kids and school exposure guide
Plan school runs, recess, and after-school time when children are more sensitive than adults.
City planning pages that pair with this AQI
Use these as repeat-visit guides when the same types of air-quality questions keep returning.
Los Angeles AQI planning guide
Interpret LA air quality for commuting, outdoor exercise, and smoke-season decisions.
San Francisco AQI planning guide
Use AQI to decide on transit, neighborhood differences, and wildfire smoke response in the Bay Area.
New York City AQI planning guide
Interpret AQI for street-level exposure, commuting, exercise, and occasional smoke events in NYC.