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Yesterday's Observed Air Quality Index (AQI) Values for New York State


New York State Air Quality Hotline: (800) 535-1345

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Yesterday's Observed :: Today's Forecast :: Extended Forecast :: AQI Information

Complete set of unofficial observed values


For Thursday, September 18, 2025 (Updated 09/19/2025 @ 8:43AM)
Region Maximum AQI Air Quality

Long Island

51
(Ozone)
Moderate

NYC Metro

58
(Fine Particles)
Moderate

Lower Hudson Valley

35
(Ozone)
Good

Upper Hudson Valley

43
(Ozone)
Good

Adirondacks

42
(Ozone)
Good

Eastern Lake Ontario

50
(Ozone)
Good

Central

51
(Ozone)
Moderate

Western

61
(Ozone)
Moderate

AQI Legend
  Data Not Available
  Good
(0-50)
  Moderate
(51-100)
  Unhealthy for Sensitive Groups
(101-150)
  Unhealthy
(151-200)
  Very Unhealthy
(201-300)
  Hazardous
(301-500)
More Information