AQI Detail Page

AQI 225: Berkeley Earth comparison and what to do next

Berkeley Earth's rough population health-impact comparison: ≈ 6.81 cigarette-equivalents if PM2.5 at AQI 225 persisted for 24 hours. This is risk communication, not particle mass, inhaled dose, cigarettes smoked, personal risk, or diagnosis.

Open AQI 225 in the calculatorCompare with AQI 50

AQI category

Very Unhealthy

PM2.5 estimate

149.7

µg/m³

Berkeley Earth comparison

6.81

Berkeley Earth cigarette-equivalents / 24h

30-day repeated comparison

204.3

Berkeley Earth cigarette-equivalents / 30 repeated days

What AQI 225 means

Even brief exposure can be irritating, and repeated exposure adds up quickly.

People with cardiopulmonary disease may need a much stricter stay-inside plan.

Stay inside as much as possible and postpone nonessential outdoor time.
Create a dedicated clean-air room and run filtration continuously.
Wear a well-fitted N95 outdoors and minimize trips to essentials only.

Berkeley Earth risk-communication comparison

1 hour: Berkeley Earth comparison ≈ 0.28 cigarette-equivalents.

2 hours: Berkeley Earth comparison ≈ 0.57 cigarette-equivalents.

24 hours: Berkeley Earth comparison ≈ 6.81 cigarette-equivalents.

7 repeated days: Berkeley Earth comparison ≈ 47.7 cigarette-equivalents.

Scenario guidance at AQI 225

These are the kinds of day-to-day decisions users commonly make from this reading.

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Commute or errands

Avoid

2 hours at AQI 225: Berkeley Earth comparison ≈ 0.57 cigarette-equivalents.

Delay nonessential errands and consolidate unavoidable travel.

Outdoor exercise

Avoid

1 hour at AQI 225: Berkeley Earth comparison ≈ 0.28 cigarette-equivalents.

Skip outdoor exercise and wait for cleaner air.

Kids, school, or playground time

Avoid

3 hours at AQI 225: Berkeley Earth comparison ≈ 0.85 cigarette-equivalents.

Keep children inside and use the cleanest indoor space you can maintain.

Sleeping with windows open

Avoid

8 hours at AQI 225: Berkeley Earth comparison ≈ 2.27 cigarette-equivalents.

Seal the room as much as possible and run filtration continuously.

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.

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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.

Read methodologyLearn AQI levels

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