{"@type": "dcat:Dataset", "accessLevel": "public", "contactPoint": {"@type": "vcard:Contact", "fn": "DCGISopendata", "hasEmail": "mailto:gisgroup@dc.gov"}, "description": "<DIV STYLE=\"text-align:Left;\"><DIV><DIV><P><SPAN STYLE=\"font-size:12pt\">This dataset contains quality assured and DOEE-certified air quality data collected from the District\u2019s five air monitoring network sites. The dataset covers a three-year period and includes hourly concentration data points from the Environmental Protection Agency (EPA)\u2019s criteria pollutants, air toxics, and speciation. It also includes hourly surface meteorology data points. The District of Columbia is providing this data for a rolling 3-year period when data become available from the EPA. For complete history of data, visit the EPA Air Quality System API at </SPAN><A href=\"http://aqs.epa.gov/aqsweb/documents/data_api.html\" target=\"_blank\" STYLE=\"text-decoration:underline;\"><SPAN STYLE=\"font-size:12pt\">aqs.epa.gov/aqsweb/documents/data_api.html</SPAN></A></P></DIV></DIV></DIV>", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://opendata.dc.gov/datasets/DCGIS::air-quality-history", "format": "Web Page", "mediaType": "text/html", "title": "ArcGIS Hub Dataset"}, {"@type": "dcat:Distribution", "accessURL": "https://maps2.dcgis.dc.gov/dcgis/rest/services/DCGIS_DATA/Environment_Air_Quality_WebMercator/MapServer/77", "format": "ArcGIS GeoServices REST API", "mediaType": "application/json", "title": "ArcGIS GeoService"}, {"@type": "dcat:Distribution", "accessURL": "https://maps2.dcgis.dc.gov/dcgis/services/DCGIS_DATA/Environment_Air_Quality_WebMercator/MapServer/WMSServer?request=GetCapabilities&service=WMS", "format": "OGC WMS", "mediaType": "application/vnd.ogc.wms_xml", "title": "OGC WMS"}, {"@type": "dcat:Distribution", "accessURL": "https://opendata.dc.gov/api/download/v1/items/515f2c8ff3534302a34bf47f6902ac0d/csv?layers=77", "format": "CSV", "mediaType": "text/csv", "title": "CSV"}, {"@type": "dcat:Distribution", "accessURL": "https://opendata.dc.gov/api/download/v1/items/515f2c8ff3534302a34bf47f6902ac0d/shapefile?layers=77", "format": "ZIP", "mediaType": "application/zip", "title": "Shapefile"}, {"@type": "dcat:Distribution", "accessURL": "https://opendata.dc.gov/api/download/v1/items/515f2c8ff3534302a34bf47f6902ac0d/geojson?layers=77", "format": "GeoJSON", "mediaType": "application/vnd.geo+json", "title": "GeoJSON"}, {"@type": "dcat:Distribution", "accessURL": "https://opendata.dc.gov/api/download/v1/items/515f2c8ff3534302a34bf47f6902ac0d/kml?layers=77", "format": "KML", "mediaType": "application/vnd.google-earth.kml+xml", "title": "KML"}], "identifier": "https://www.arcgis.com/home/item.html?id=515f2c8ff3534302a34bf47f6902ac0d&sublayer=77", "issued": "2021-12-15T16:15:14.000Z", "keyword": ["air quality", "ozone", "PM2.5", "carbon monoxide", "washington dc", "district of columbia", "dc", "environment", "particulate matter"], "landingPage": "https://opendata.dc.gov/datasets/DCGIS::air-quality-history", "license": "https://creativecommons.org/licenses/by/4.0", "modified": "2025-11-24T00:00:00.000Z", "publisher": {"name": "Department of Energy and Environment"}, "spatial": "-77.0185,38.8148,-76.9707,38.9689", "theme": ["geospatial"], "title": "Air Quality History"}