Hourly Air Quality Data from Washington DC Monitoring Network

Hourly air quality data points from the District of Columbia's air monitoring network sites, provided for a rolling 1-year period. The dataset is quality controlled by a process of field data verification and validation and is published by the District of Columbia. For complete real-time data, users are directed to the EPA AirNow system.

Use Cases

• Modeling hourly pollutant concentration trends based on real-time monitoring data.
• Mapping air quality across Washington DC based on the network of monitoring sites.
• Validating air quality forecasts using quality-controlled, ground-truth measurements.
• Analyzing seasonal or diurnal patterns in urban air pollution.

Strengths

• Data undergoes a quality control process of field verification and validation.
• Provided for a rolling 1-year period, offering recent temporal coverage.
• Available in multiple formats including CSV, GEOJSON, and via API for flexible access.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

District of Columbia

Collection Method

Captured from the District's air monitoring network sites.

Time Range

Rolling 1-year period

Freshness

Last updated 2026-03-25 08:07:10.910013; freshness should be verified.

Geography

Washington DC, District of Columbia