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City
Air Quality
City of New York —
Dataset contains information on New York City air quality surveillance data. Air pollution is one of the most important environmental threats to urban populations... -
Federal
Clean Air Status and Trends Network (CASTNET) Download Data Module
U.S. Environmental Protection Agency —
The CASTNET Download Data module allows users to select, view, and download CASTNET data (Raw, Aggregate, Modeled & Factual Data) based on user selections.... -
Federal
Regional Air Quality Data
U.S. Environmental Protection Agency —
This asset provides data on regional air quality, including trace level SO2, nitric acid, ozone, carbon monoxide, and NOy; and particulate sulfate, nitrate, and... -
Federal
Clean Air Status and Trends Network (CASTNET): Ozone
U.S. Environmental Protection Agency —
8-hour daily maximum ozone concentrations as measured by the Clean Air Status and Trends Network (CASTNET) -
Federal
AirNow Real Time Air Quality REST API
U.S. Environmental Protection Agency —
A REST web service API allowing the retrieval of real time air quality index data from AirNow. -
Air Quality History
District of Columbia —
This dataset contains quality assured and DOEE-certified air quality data collected from the District’s five air monitoring network sites. The dataset covers a three-... -
Federal
Clean Air Markets Program Data Application (CAMPD)
U.S. Environmental Protection Agency —
The Clean Air Markets Program Data (CAMPD) application, accessible at https://campd.epa.gov/, allows users to view Clean Air Markets data through the Custom Data... -
City
Open Air Chicago Individual Measurements
City of Chicago —
Sensors deployed throughout the City by Open Air Chicago measuring fine particulate matter 2.5 (PM2.5) and nitrogen dioxide (NO2). All sensors collect data on PM2.5... -
Federal
Air Quality System (AQS)
U.S. Environmental Protection Agency —
The Air Quality System (AQS) database contains measurements of air pollutant concentrations from throughout the United States and its territories. The measurements... -
State
GHG Reporting Program Publication
State of Washington —
This dataset contains data reported to Ecology as of January 24, 2025. This dataset contains both reported and covered emissions. Some of these emissions have been... -
Federal
Collection National Transportation Library (NTL) Repository & Open Science Access Platform (ROSA P)
Department of Transportation —
The National Transportation Library (NTL) provides national and international access to transportation information, coordinates information creation and... -
Emissions Inventory
District of Columbia —
NEI point sources include emissions estimates for larger sources that are located at a fixed, stationary location. Point sources in the NEI include large industrial... -
City
NYCCAS Air Pollution Rasters
City of New York —
Citywide raster files of annual average predicted surface for nitrogen dioxide (NO2), fine particulate matter (PM2.5), black carbon (BC), and nitric oxide (NO);... -
Federal
Census Tract EQI
U.S. Environmental Protection Agency —
The Environmental Quality Index (EQI) accounts for the multiple domains of the environment with which humans interact. These domains include chemical, natural, built,... -
County
Allegheny County Air Quality
Allegheny County / City of Pittsburgh / Western PA Regional Data Center —
Air quality data is collected from the Allegheny County Health Department monitors throughout the county. This data must be verified by qualified individuals before... -
Federal
AP-42 Emissions Factors (WebFIRE)
U.S. Environmental Protection Agency —
Emissions factors have long been the fundamental tool in developing national, regional, state, and local emissions inventories for air quality management decisions... -
Federal
Mobile source air quality data used as inputs to generate health effect incidence. PM and ozone health effect incidence for 17 mobile source sectors in 2011 and 2025; baseline mortality incidence in 2011 and 2025; and mortality percentage maps
U.S. Environmental Protection Agency —
Mobile source-related PM and Ozone air quality concentration data used as inputs to BenMAP-CE to generate the attributable health burden of 17 different mobile sector... -
Federal
Temperature, ozone, and PM2.5 data for "Associations Between Simulated Future Changes in Climate, Air Quality, and Human Health" by Fann et al., 2021.
U.S. Environmental Protection Agency —
This dataset contains modeled temperature, ozone, and PM2.5 data for the United States over the 21st century, using two global climate model scenarios and two... -
Federal
AirData AQS REST API
U.S. Environmental Protection Agency —
A REST web service API allowing the retrieval of historical air quality data from EPA.