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

Daily AQI Table

Pollutant	10/18/25	10/19/25	10/20/25	10/21/25	10/22/25
Ozone	58	44	40	50	40
PM2.5	58	51	40	52	50

Synopsis and Discussion

A line of showers associated with a cold front will sweep through this evening. Pockets of lower Code Yellow particle pollution are being observed ahead of the front and with cleaner air arriving late today, daily averages are expected to net out right near the Code Green/Yellow threshold. Good air quality is anticipated to kick off the new workweek before transient high pressure moves overhead, creating an environment conducive for the formation of strong temperature inversions. The inversions will help concentrate fine particles near the surface both during the morning and evening hours on Tuesday, pushing daily averages into the lower Code Yellow range. Another cold front will sweep through on Wednesday, promoting Code Green conditions. Ozone is expected to largely remain in check but could approach the Code Green/Yellow threshold on Tuesday. (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