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

Daily AQI Table

Pollutant	10/17/25	10/18/25	10/19/25	10/20/25
Ozone	44	50	38	40
PM2.5	52	60	51	35

Synopsis and Discussion

A wide spread in particle pollution concentrations from the lower Code Green range to near the Code Green/Yellow threshold is being observed once again today while ozone is steady in the upper Code Green range. The main weather system of the next three days will be a cold front sweeping through on Sunday night, bringing with it the threat of a few showers and some breezy conditions. An uptick in particle pollution levels to the lower Code Yellow range is anticipated tomorrow, potentially lasting into Sunday. Daily averages on Sunday will likely be right near the Code Green/Yellow threshold and largely dependent on the timing of the front and how quickly cleaner air arrives in its wake. By Monday, a clean air mass will be filtering into the Triad. (Greg Perrotte / perrotgt@forsyth.cc)

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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