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Full catalog/HAQES_NA_PM25_OC_COUNTY
HAQES_NA_PM25_OC_COUNTY·v1·dataset

Organic-carbon soot in the air by county, every 3 hours

HAQES 3-Hourly Ensemble mean surface PM2.5 Organic Carbon concentration at county level, North America V1 (HAQES_NA_PM25_OC_COUNTY) at GES DISC
atmosphere NASA GES_DISC Level 4 active
In plain English

What it measures. An estimate of organic-carbon soot pollution (a component of fine PM2.5 particles) near the ground, reported county by county across the continental U.S. every three hours.

How it's made. Produced by HAQES, a forecasting system that blends together several U.S. agency air-quality models to predict hazardous air events like wildfire smoke and dust, then averages them and maps the result to counties.

How & where you'd use it. Helpful for tracking and forecasting hazardous air quality during wildfires and dust storms, and for public-health work that needs pollution estimates at the county level.

What's measured

ATMOSPHERE › AIR QUALITYATMOSPHERE › AEROSOLS › PARTICULATE MATTERHUMAN DIMENSIONS › PUBLIC HEALTH › ENVIRONMENTAL HEALTH FACTORS › PARTICULATE MATTER CONCENTRATIONSHUMAN DIMENSIONS › PUBLIC HEALTH › ENVIRONMENTAL HEALTH FACTORS › PARTICULATE MATTER (PM 2.5)

Coverage & cadence

  • Time span2022-11-01 → ongoing
  • Measured byHAQES (NOT APPLICABLE)
  • Processing levelLevel 4
  • Spatial extent-132, 21, -58.5, 53.5
  • StatusACTIVE

What you can do with it

  • Map air pollutants — NO₂, aerosols, ozone
  • Track greenhouse gases and Earth's energy budget
  • Feed weather and air-quality analysis
Official description

This product provides HAQES 3-hourly ensemble mean surface PM2.5 Organic Carbon concentration at the county level over the continental United States (CONUS). The Hazardous Air Quality Ensemble System (HAQES) is a real-time ensemble forecast of hazardous air quality events, such as wildfires, dust storms, and Volcanic eruptions. Both regional and global models from multiple agencies are used to create the ensemble, including the Goddard Earth Observing System (GEOS) from the National Aeronautics and Space Administration (NASA), the Navy Aerosol Analysis and Prediction System (NAAPS) from Naval Research Laboratory, the Global Ensemble Forecast System Aerosols (GEFS), High-Resolution Rapid Refresh (HRRR), and National Oceanic and Atmospheric Administration-U.S. Environmental Protection Agency (NOAA-EPA) Atmosphere-Chemistry Coupler-Community Multiscale Air Quality model (NACC-CMAQ) from NOAA. The prototypes of HAQES products were developed by the George Mason University Air Quality Laboratory as part of the NASA Health Air Quality Applied Science Team (HAQAST).

Get the data

haqes_na_pm25_oc_county_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="HAQES_NA_PM25_OC_COUNTY",
    version="1",
    bounding_box=(-122.5, 37.2, -121.8, 37.9),  # your area (W,S,E,N)
    temporal=("2024-01-01", "2024-12-31"),       # your dates
)
files = earthaccess.open(results)   # stream straight from GES_DISC
Browsing CMR needs no login. Downloading or streaming bytes needs a free Earthdata Login + the earthaccess package.