Note: Hover over datapoints on the graph for more information.

Daily AQI Table

Pollutant	09/13/25	09/14/25	09/15/25	09/16/25	09/17/25
Ozone	46	51	48	40	45
PM2.5	55	48	49	44	41

Synopsis and Discussion

High pressure continues to keep the Triad's skies clear and dry, with light winds allowing ozone levels to creep up towards the lower portion of the Code YELLOW range this afternoon. Unlike previous days, ozone quickly reached Code YELLOW earlier in the day, which allows for a better chance at the daily average sustaining a Code YELLOW despite the decreasing total daylight hours that we typically observe as we approach the autumnal equinox. Clouds begin to increase from east to west tomorrow as a coastal low gets closer to the coastline and pulls in moisture along the northern side of the storm system. Skies remain cloudy Tuesday as chances of rain increase as the low moves into the coastal areas of northeastern NC, dropping ozone and particle pollution levels into the low to middle Code GREEN range. Ozone and particle pollution AQI is expected to rise to the middle to upper Code GREEN on Wednesday as the low pressure system finally pulls off to the north during the day, with decreasing cloud cover allowing for a late rise in ozone levels before sunset. (Payne)

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Air Monitoring Data

The Forsyth County Office of Environmental Assistance and Protection is making data available from the county's air monitoring network as a public service. These data represent the hourly data set from all of the sites within this network. Data from Triad sites outside of Forsyth County are collected by the North Carolina Division of Air Quality.

Reports

• Current Hourly Data(pdf)(txt)
• Yesterday's Data & Calibration Report(pdf)(txt)
• Simple Key for Reading Data File