Department of Energy and EnvironmentDataset is comprised of hourly air quality data points captured from the District's air monitoring network sites. The dataset is quality controlled by a process of field data verification and validation. The District of Columbia is providing this data for a rolling 1-year period. For complete real-time data, visit the EPA AirNow system at docs.airnowapi.orgArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/20c07bd1506249d4877ee45acfa73b71_76engOpen Data DCPublicAir Quality Realtime [District of Columbia--Washington]Web servicesDistrict of Columbia--WashingtonDistrict of ColumbiaLast Modified: 2026-01-06