AQI Detail Page
AQI 165: Berkeley Earth comparison and what to do next
Berkeley Earth's rough population health-impact comparison: ≈ 3.43 cigarette-equivalents if PM2.5 at AQI 165 persisted for 24 hours. This is risk communication, not particle mass, inhaled dose, cigarettes smoked, personal risk, or diagnosis.
AQI category
Unhealthy
PM2.5 estimate
75.5
µg/m³
Berkeley Earth comparison
3.43
Berkeley Earth cigarette-equivalents / 24h
30-day repeated comparison
102.9
Berkeley Earth cigarette-equivalents / 30 repeated days
What AQI 165 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.
Berkeley Earth risk-communication comparison
1 hour: Berkeley Earth comparison ≈ 0.14 cigarette-equivalents.
2 hours: Berkeley Earth comparison ≈ 0.29 cigarette-equivalents.
24 hours: Berkeley Earth comparison ≈ 3.43 cigarette-equivalents.
7 repeated days: Berkeley Earth comparison ≈ 24 cigarette-equivalents.
Scenario guidance at AQI 165
These are the kinds of day-to-day decisions users commonly make from this reading.
Commute or errands
Move indoors2 hours at AQI 165: Berkeley Earth comparison ≈ 0.29 cigarette-equivalents.
Keep trips short, wear a well-fitted mask, and avoid adding extra outdoor stops.
Outdoor exercise
Move indoors1 hour at AQI 165: Berkeley Earth comparison ≈ 0.14 cigarette-equivalents.
Take the workout indoors. Heavy breathing raises inhaled dose quickly.
Kids, school, or playground time
Move indoors3 hours at AQI 165: Berkeley Earth comparison ≈ 0.43 cigarette-equivalents.
Shift recess, pickup waiting, and playtime indoors when possible.
Sleeping with windows open
Move indoors8 hours at AQI 165: Berkeley Earth comparison ≈ 1.14 cigarette-equivalents.
Keep windows shut and rely on filtered indoor air.
Explore nearby readings
Related AQI Berkeley Earth comparisons
Open a nearby or commonly searched AQI value to see how estimated PM2.5 concentration, Berkeley Earth's rough population health-impact comparison, and action guidance change.
Why the estimate is credible
The site first converts a PM2.5 pollutant AQI into an estimated concentration, then applies Berkeley Earth's rough population health-impact comparison.
The result is for risk communication—not particle mass, inhaled dose, cigarettes actually smoked, personal risk, or diagnosis.
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