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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
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. -
City
Inpatient, Emergency Department, and Outpatient Visits for Respiratory Illnesses
City of Chicago —
This dataset includes aggregated weekly data on the percent of emergency department visits and the percent of hospital inpatient admissions due to influenza-like... -
Federal
Pharmaceuticals in the Environment, Information for Assessing Risk (PEiAR)
National Oceanic and Atmospheric Administration, Department of Commerce —
The database provides information on prescribed amounts, levels detected in aquatic environments, chemical structure, molecular weight, octanol-water partition... -
City
Respiratory Virus Wastewater Surveillance
City of Chicago —
Concentrations of respiratory viruses in the Chicago sewer system as measured at seven sewershed sites since February 2022. In addition to SARS-CoV-2 (the virus that... -
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. -
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. -
City
Change Notice: COVID-19 Vaccination Column Updates - 2/13/2026
City of Chicago —
Upcoming change to the Respiratory Virus Wastewater Surveillance Dataset. -
Federal
Air Emissions Where You Live KMZ File
U.S. Environmental Protection Agency —
A KMZ file with the location of all major facilities that emit pollutants into the atmopshere. -
City
Change Notice: Respiratory Virus Wastewater Surveillance Dataset - 1/29/2026
City of Chicago —
Upcoming change to the Respiratory Virus Wastewater Surveillance Dataset. -
Federal
Air Quality System (AQS) ambient observations: 2007 ozone
U.S. Environmental Protection Agency —
Ambient ozone concentrations for 2007 from the national ambient air quality monitoring networks stored in the Air Quality System (AQS). -
City
Public Health Statistics - Asthma hospitalizations in Chicago, by year, 2000-2011 - Historical
City of Chicago —
Note: This dataset is historical only and there are not corresponding datasets for more recent time periods. For that more-recent information, please visit the... -
City
Influenza, COVID-19, RSV, and Other Respiratory Virus Laboratory Surveillance
City of Chicago —
This dataset includes aggregated weekly respiratory virus laboratory data that the Chicago Department of Public Health (CDPH) uses to monitor influenza, COVID-19,... -
Federal
PISCES-NO2-data-version 6.2.2021
U.S. Environmental Protection Agency —
This dataset contains data in lung function, blood lipid markers, blood vascular markers, coagulation markers, and heart rate variability markers in participants of a... -
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. -
Federal
KMZ files of EPA Ambient Monitors
U.S. Environmental Protection Agency —
KMZ files with the location of all the EPA ambient monitors with the ability to download data from within the description box. -
Federal
Web page with links to air quality and emissions data
U.S. Environmental Protection Agency —
A web page that describes and links to EPA systems for accessing and downloading ambient (outdoor) air quality and emissions data -
Federal
Web page with Air Quality System (AQS) ambient observation files
U.S. Environmental Protection Agency —
Ambient concentrations of most requested pollutants from the national ambient air quality monitoring networks stored in the Air Quality System (AQS). -
Federal
KMZ files of EPA Ambient Monitors
U.S. Environmental Protection Agency —
KMZ files with the location of all the EPA ambient monitors with the ability to download data from within the description box.