Virginia air quality

Broadlands, Virginia Air Quality

Loudoun County39.018, -77.520

The nearest monitor to Broadlands, at ASHBURN, 2 miles away, measured an index of 33 at Sun, 12:00 PM EDT, which is Good for fine particles (PM2.5). Virginia Dept. of Environmental Quality forecasts Good for Northern Virginia today and Good tomorrow. NOAA’s analysts drew light wildfire smoke over the town today.

Measured now
33 · Good
Today
44 · Good
Tomorrow
39 · Good
Pollutant
PM2.5

Fine particles on the map

Forecast fine particulate matter from NOAA’s National Air Quality Forecast Capability over Broadlands, Virginia. Open it for the live map, where it pans and zooms.

Forecast fine particulate matter from NOAA’s National Air Quality Forecast Capability over Broadlands, Virginia Open the live map with the particulate forecast

Map layer from NOAA National Air Quality Forecast Capability. Boundaries from the Iowa Environmental Mesonet.

Alerts in force

An Air Quality Alert is issued by the National Weather Service on behalf of a state or local agency when pollution is expected to reach a level that harms health. An Air Stagnation Advisory means the air will not move enough to clear what is already in it.

None are in force near Broadlands right now. All Virginia warnings.

Now

Good

Nearest monitor
ASHBURN, 2 miles away (site 511071005)
Index measured
33 · Good
Measured at
Sun, 12:00 PM EDT
Fine particles
6.9 µg/m³
Ozone
34 ppb
Reporting area
Northern Virginia, VA, 8 miles away
Reported by
Virginia Dept. of Environmental Quality
Area index
33 · Good

Measured, not modeled. AirNow observations are preliminary until the operating agency certifies them, which happens months later.

Today and tomorrow

Virginia Dept. of Environmental Quality's own forecast for Northern Virginia, written by a forecaster rather than read off a model.

DayCategoryIndexPollutant
TodayGood44PM2.5
TomorrowGood39PM2.5
Tuesday, September 22Good28PM2.5
Wednesday, September 23Good28PM2.5

Hour by hour

NOAA’s air quality model could not be read for this point just now. It runs twice a day and covers the lower 48, Alaska and Hawaii.

Smoke

NOAA’s Hazard Mapping System analysts drew light smoke over Broadlands in satellite imagery today (Sun, 8:00 AM EDT to Sun, 11:00 AM EDT). That is smoke seen from above; it is not always smoke at ground level.

NOAA’s model forecasts no measurable smoke near the ground here over the next two days.

Smoke on the radar over Broadlands

What this means

Good

Air quality is satisfactory, and air pollution poses little or no risk.

Who is affected
Nobody is expected to be affected.
What to do
It is a good day to be outside.
Index range
0 to 50

Category descriptions are the Environmental Protection Agency’s own.

What these numbers are. An index beside a monitor’s name is a measurement, published hourly by AirNow and preliminary until the operating agency certifies it. A category for today or tomorrow is a state or local agency forecaster’s own forecast for a reporting area. An hourly index is NOAA’s air quality model on a five-kilometer grid, not a reading from any instrument. Where a town has no monitor within reach, only the model figures appear, and the page says so.

Nearby

The nearest towns with a page of their own, closest first.

Weather forecast for BroadlandsWarnings in Loudoun CountyLive radar over BroadlandsVirginia air quality

Sources

Observations and daily forecasts from AirNow, the US Environmental Protection Agency’s program with NOAA, the National Park Service, NASA, tribal, state and local agencies. Hourly forecasts from NOAA’s National Air Quality Forecast Capability. Smoke analysis from NOAA’s Hazard Mapping System. Alerts from the National Weather Service. Index categories and breakpoints are EPA’s, as revised in 2024.