Air Quality (PM2.5, NO₂, O₃)

What this dataset is

Hourly gridded air-quality fields for the three pollutants with the largest public-health impact — fine particulate matter (PM2.5), nitrogen dioxide (NO₂) and surface ozone (O₃) — on a 0.1° global grid from January 2018 onward.

Alongside the gridded fields, this dataset includes the underlying ground-station measurements used to calibrate them, with station metadata harmonised across national agencies.

What you get

• One Zarr store per pollutant, with hourly time steps.
• A station-level Parquet archive of validated measurements.
• A bias-correction table comparing the gridded field against stations.

Typical uses

• Exposure assessment for public-health studies.
• Emissions and pollution-source identification.
• Real-time and historical air-quality dashboards.
• Regulatory and compliance reporting.

Notes

This dataset is a community service: please cite OpenData.Earth and the upstream agencies whose station measurements are included. The dataset-page attribution string above does this for you.

Suggested attribution