United States
Air quality in Boston is good. Safe for outdoor exercise.
Data from Open-Meteo • Updated 6:04:21 PM
Boston's air quality benefits from ocean breezes and progressive environmental policies, though summer heat can push ozone higher. The Charles River Esplanade and waterfront paths offer some of the cleanest air in the city, while traffic corridors downtown can see elevated pollution during rush hours.
Based on hourly averages, 2023–2025 · Data: Open-Meteo / CAMS
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<a href="https://www.aeriqo.app/cities/boston"><img src="https://www.aeriqo.app/api/badge/boston" width="300" height="64" alt="Live air quality in Boston (Aeriqo)" loading="lazy"></a>
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Try it freeBoston typically sees AQI readings between 25 and 55, mostly in the Good range. Occasional summer ozone events may push readings into the Moderate category.
The Charles River Esplanade offers excellent running conditions with generally clean air. Spring through fall mornings provide the best combination of air quality and pleasant temperatures.
Charles River Esplanade, Emerald Necklace, Middlesex Fells, and the highway corridors Boston runners should avoid.
Deep dive into pollutants, thresholds, and how air quality affects your running performance.
Quick threshold lookup for every AQI level. Know when to run and when to stay indoors.
