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  4. Merrimack County
  5. Hopkinton

Hopkinton

Merrimack County, New Hampshire

2026-09-20 16:00
AQI (China)
Excellent
Pollutants|Pollens
O3
μg/m³
26
PM10
μg/m³
5.6
PM2.5
μg/m³
3.3
NO2
μg/m³
7.9
CO
μg/m³
200.1
SO2
μg/m³
1.3
Weather
  • ℃
  • ℉
12℃
92%
0 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (China)
  • Pollen
  • O3
  • PM10
  • PM2.5
  • NO2
  • CO
  • SO2

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