Air Quality in Boston
Boston has improved air quality significantly but faces challenges from traffic and heating emissions.
📊 AQI Monitoring
MassDEP monitors air quality across the state. Boston maintains urban monitoring stations.
Standard: EPA AQI & Canadian AQHI (AQI/AQHI)
⚠️ Key Pollutants
- Traffic emissions
- Heating system emissions
- Ozone transport
- Construction dust
Local Regulations
Regional Greenhouse Gas Initiative. State emission limits. Building emission standards.
Understanding air quality in Boston
Boston's outdoor air is shaped mainly by traffic emissions, heating system emissions, ozone transport. These climb during rush hours and settled, still weather when pollutants aren't dispersed — which is why local agencies monitor them closely and enforce the rules above.
Whatever today's AQI shows on the live data, the air inside your home is typically 2–5× more polluted than outdoors, and it's the part you can actually control. Sizing a MERV‑13 or HEPA purifier to your room is the most reliable way to protect Boston households on high‑pollution and wildfire‑smoke days — use the free ACH calculator to get the size right.
Outdoor Air in Boston Is Hard to Change. Indoor Air Isn't.
The EPA says indoor air can be 2-5x more polluted than outside. For Boston residents, the most effective long-term solution is a quality indoor air purifier — removing 90%+ of PM2.5, allergens, and pollutants where you spend most of your time.
Shop Clean Air KitsIndoor Air Quality Tips for Boston
- ✓AirNow provides real-time data
- ✓Older buildings benefit from supplemental HEPA
- ✓Consider whole-building filtration upgrades
Improve Your Indoor Air Quality
DIY HEPA & MERV air purifiers from $149. Effective, affordable solutions for Boston residents.
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