AQI Detail Page
AQI 175: cigarette equivalent, interpretation, and what to do next
At AQI 175, a full day of exposure is roughly equivalent to smoking 3.64 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
Unhealthy
PM2.5 estimate
80
µg/m³
Daily equivalent
3.64
cigarettes / 24h
If repeated daily
109.2
cigarettes / 30 days
What AQI 175 means
Outdoor dose rises fast in this band, especially if windows are open or activity is strenuous.
Sensitive groups should stay indoors as much as possible and use cleaner indoor air.
Exposure framing
1 hour: about 0.15 cigarettes.
2 hours: about 0.3 cigarettes.
24 hours: about 3.64 cigarettes.
7 repeated days: about 25.5 cigarettes.
Scenario guidance at AQI 175
These are the kinds of day-to-day decisions users commonly make from this reading.
Commute or errands
Move indoors2 hours equals 0.3 cigarettes at AQI 175.
Keep trips short, wear a well-fitted mask, and avoid adding extra outdoor stops.
Outdoor exercise
Move indoors1 hour equals 0.15 cigarettes at AQI 175.
Take the workout indoors. Heavy breathing raises inhaled dose quickly.
Kids, school, or playground time
Move indoors3 hours equals 0.45 cigarettes at AQI 175.
Shift recess, pickup waiting, and playtime indoors when possible.
Sleeping with windows open
Move indoors8 hours equals 1.21 cigarettes at AQI 175.
Keep windows shut and rely on filtered indoor air.
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.