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Current Total Atmospheric PM-2.5 24-Hour Levels

The map below shows the current highest total atmospheric pm-2.5 24-hour levels measured in no units (No Units) for each of the metropolitan or other areas across United States where total atmospheric pm-2.5 is measured by the TREX. More detailed maps showing the current 24-hour total atmospheric pm-2.5 levels measured at each site in a particular area are available by clicking on the boxes on the map. These levels are based on data measured at the TREX's continuous air monitoring stations and may include data from local governments and private monitoring networks.

The latest imagery available is for Friday October 18, 2019 17:00 MDT.

Key to Total Atmospheric PM-2.5 Highlight Colors:

The daily average color-coding is based on the 24-hour standard levels for PM-2.5.
The table below shows the levels, color-coding, and suggested actions for the 24-hour standard.

Color Air Quality Rating 1-Hour
Actions to take

PLEASE NOTE: This data has not been verified by the TREX and may change. This is the most current data, but it is not official until it has been certified by our technical staff. Data is collected from TREX ambient monitoring sites and may include data collected by other outside agencies. This data is updated hourly. All times shown are in local standard time unless otherwise indicated.