Boston air quality · Massachusetts, United States
Most people won't notice any effects at this level
US AQI 55 (Moderate) in Boston, from 1 AirNow monitoring station. Main pollutant: PM2.5.
Updated
Pollutants in Boston
- PM2.555AQI
- NO₂29AQI
- SO₂3AQI
- PM106AQI
- Ozone12AQI
US values are per-pollutant AQI from the highest-reading monitor near Boston (Chelsea).
Is it safe outside in Boston right now?
Air quality is acceptable. People who are unusually sensitive to air pollution may feel effects with long or heavy exertion outdoors.
Walking and commuting
Go aheadFine for everyone.
Running and jogging
Take careFine for most; unusually sensitive people should ease the pace.
Cycling
Go aheadFine for everyone.
Children playing outside
Go aheadNo limits for most children.
Older adults and heart or lung conditions
Take careWatch for symptoms such as coughing or breathlessness.
Open windows
Go aheadFine to ventilate.
Mask outdoors
Not neededNot needed.
Air purifier indoors
Not neededOptional.
Based on the US EPA Air Quality Guide, applied to the current US AQI category. If you have symptoms, follow your doctor's advice.
What US AQI 51–100 means for your health →
Boston air quality history
Daily average, 36 days- 30average daily US AQI over 36 days
- 54worst day, 2 October
- 18cleanest day, 29 September
- 0days at Unhealthy or worse
The last 7 days averaged 32, about the same as the week before (31). 35 of the last 36 days were Good.
Weather in Boston
No active National Weather Service alerts for Boston.
| Day | Forecast | High | Low | Rain |
|---|---|---|---|---|
| Mon 19 | Sunny | 57°F | 45°F | 0% |
| Tue 20 | Partly Sunny | 61°F | 46°F | 0% |
| Wed 21 | Partly Sunny | 54°F | 43°F | 15% |
| Thu 22 | Mostly Sunny | 61°F | 45°F | 13% |
| Fri 23 | Sunny | 55°F | 39°F | 1% |
| Sat 24 | Sunny | 57°F | 41°F | 1% |
| Sun 25 | Sunny | 63°F | 46°F | 2% |
National Weather Service forecast. All US weather alerts →
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Boston air quality: common questions
What is the AQI in Boston right now?
The US AQI in Boston is 55 (Moderate). The main pollutant is PM2.5.
Is it safe to go outside in Boston today?
Fine for most people. Air quality is acceptable. People who are unusually sensitive to air pollution may feel effects with long or heavy exertion outdoors. For runners: Fine for most; unusually sensitive people should ease the pace.
How has air quality in Boston been recently?
Over the last 36 days with data, Boston averaged US AQI 30. The worst day was 2 October at 54; the cleanest was 29 September at 18. 0 days were at Unhealthy or worse.
Where does Boston's air quality data come from?
From US EPA AirNow, using 1 monitoring station in and around the city. Good Air does not estimate or adjust these readings.
Source: US EPA AirNow. Readings are published by the monitoring agency and may be revised.