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, 1151 monitoring stations are currently reporting PM2.5 levels, with 138 stations showing air quality above the Moderate range. The most affected areas include Hood River West Side FD, Oregon, with a current reading of 234 µg/m³ and a forecast to exceed 500 µg/m³ in the next 48 hours, and Weiser PM25, Idaho, at 214 µg/m³, also expected to surpass 500 µg/m³. Entiat, Washington, is reporting 188 µg/m³ with a forecast of 207 µg/m³, while Prineville - Davidson Park, Oregon, and Eugene - Wilkes Dr., Oregon, both show 150 µg/m³, with Prineville expected to exceed 500 µg/m³. Over the next 48 hours, models predict the highest smoke levels in Omak-Colville Tribe, Washington, Winthrop-Chewuch Rd, Washington, Twisp-S Lincoln St, Washington, Soap Lake, Washington, Hood River West Side FD, Oregon, and San Andreas, California, all forecast to exceed 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, 10:44AM EDT
or
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
Checking…
Forecast models
Checking…
Page generated
Checking…
Next scheduled refresh
Checking…
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.