Boston vs Toronto

Live AQI Comparison

Updated 3h ago · Data from OpenAQ

Boston

United States

Good

PM2.58 µg/m³

PM10—

Toronto

Canada

Good

PM2.54 µg/m³

PM10—

Verdict

Boston currently has worse air quality than Toronto (AQI 16 points higher). Both cities have acceptable air quality levels.

Boston vs Toronto Air Quality Analysis

Based on the latest measurements, Boston has an AQI of 33 compared to Toronto's AQI of 17. The World Health Organization (WHO) recommends annual PM2.5 levels below 15 µg/m³ and 24-hour levels below 45 µg/m³.

PM2.5 levels in both cities are within WHO guidelines. Outdoor activities can be enjoyed without air quality concerns.

Air quality can change rapidly due to weather patterns, traffic, and industrial activity. Check back hourly for the latest comparison between Boston and Toronto.

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Frequently Asked Questions

Which city has worse air quality today, Boston or Toronto?

Boston currently has worse air quality with an AQI of 33 compared to Toronto's AQI of 17. This data is updated hourly from government monitoring stations.

Is it safer to be in Boston or Toronto right now?

Based on current AQI levels, Toronto (AQI 17) has safer air quality than Boston (AQI 33). Both cities have acceptable air quality for outdoor activities.

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