Waltham Real-time Air Quality Index (AQI) & Pollen Report - Air Matters

Waltham

Middlesex County, Massachusetts

2026-05-16 22:00

AQI (China)

Excellent

Pollutants|Pollens

PM10

μg/m³

13

PM2.5

μg/m³

4.1

Weather

21℃

50%

26 kph

0 of 11

Historical Data

Data Sources

http://www.airnow.gov/

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