Hourly fine particulate matter (PM2.5) at 1285 US monitoring stations, compared against the FireSmoke, FireWork and HRRR smoke forecasts.
National outlookAcross the United States, 1157 monitoring stations are currently reporting PM2.5 levels, with 138 stations showing air quality above the Moderate range. Several communities are experiencing Hazardous conditions, including Prineville - Davidson Park, Oregon (296 µg/m³), E Wenatchee 8th St NE, Washington (269 µg/m³), Hood River West Side FD, Oregon (243 µg/m³), Entiat, Washington (238 µg/m³), and Chelan-Woodin Ave, Washington (155 µg/m³). Forecasts indicate that some of these locations, such as Prineville - Davidson Park, Hood River West Side FD, and Chelan-Woodin Ave, may see levels rise above 500 µg/m³ in the next 48 hours. The highest forecasted smoke levels in the coming days are expected in Winthrop-Chewuch Rd, Twisp-S Lincoln St, Soap Lake, Omak-Colville Tribe, all in Washington, as well as Hood River West Side FD, Oregon, and San Andreas, California, where models predict levels above 500 µg/m³.
AI-generated summary of the latest observations and forecasts — may contain errors and is based only on official federal, state, local and tribal data · updated Aug 06, 12:44PM EDT
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Forecast PM2.5 peaks from now, using the higher available model value
PM2.5 observations and smoke forecasts (µg/m³)
Observations and NowCast are total PM2.5 — wildfire smoke plus every other source — as regulatory monitors measure it, and FireWork models that same total. FireSmoke is a smoke-dispersion model: it estimates the wildfire contribution only, so it reads lower than the monitors whenever other sources matter. The map's optional plume layer is likewise fires-only.
Stated times are local to the selected station and mark the end of each
measurement hour, as agency displays do. FireSmoke is UBC's BlueSky dispersion model;
FireWork is ECCC's operational chemistry model; HRRR-Smoke is NOAA's 3 km smoke
model. NowCast is the US EPA's smoke-responsive weighted average of recent hours;
the shaded bands are US EPA AQI category thresholds (24-h basis, 2024 revision),
which apply to NowCast — not to single hourly readings.
The dashed line marks now; forecasts extend beyond it.
Data table
Time (local)
Observed µg/m³
FireSmoke µg/m³
FireWork µg/m³
Map layers
Fires
Smoke & weather
Selected observation
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Forecast models
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Page generated
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Next scheduled refresh
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Smoke forecasts by city
Select a state for an overview of every monitor there.
This site aggregates public air-quality measurements and smoke forecasts for general information. It is not an emergency service and is not monitored. Always follow the advice of local or state authorities and refer to official government sources of information.