Datasets
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AirNow Real Time Air Quality REST API
A REST web service API allowing the retrieval of real time air quality index data from AirNow. -
Web page with Air Quality System (AQS) ambient observation files
Ambient concentrations of most requested pollutants from the national ambient air quality monitoring networks stored in the Air Quality System (AQS). -
AQS Data Mart
The AQS Data Mart is a database that contains all of the information from the AQS system. It is a storehouse of air quality information that allows users to make queries of... -
Historical Ambient Air Quality Data Inventory
The Historical Ambient Air Quality Data Inventory contains measured and estimated data on ambient air pollution for use in assessing air quality, assisting in designating... -
Control Strategy Tool (CoST)
The EPA Control Strategy Tool (CoST) is a software tool for projecting potential future control scenarios, their effects on emissions and estimated costs. This tool uses the NEI... -
OAR Tribal System
OTS is an internal EPA national tribal database to assist the Regions and HQs in tracking tribal performance information. -
Monitoring Knowledge Base (MKB)
The Monitoring Knowledge Base (MKB) is a compilation of emissions measurement and monitoring techniques associated with air pollution control devices, industrial process... -
Community Multi-scale Air Quality (CMAQ) Model Outputs
The CMAQ Model Outputs data asset includes current and projected future levels of ambient concentrations and deposition to support regulatory impact analyses. -
Air Quality System (AQS) ambient observations: 2007 ozone
Ambient ozone concentrations for 2007 from the national ambient air quality monitoring networks stored in the Air Quality System (AQS). -
Title V Permitting Statistics Inventory
The Title V Permitting Statistics Inventory contains measured and estimated nationwide statistical data, consisting of counts of permitted sources, types of permits issued, and... -
Control Measure Dataset
The EPA Control Measure Dataset is a collection of documents describing air pollution control available to regulated facilities for the control and abatement of air pollution... -
Air Emisisons Inventories
This data exchange allows states to submit data to the US Environmental Protection Agency's National Emissions Inventory (NEI). NEI is a national database of air emissions... -
Photochemical Assessment Monitoring Stations (PAMS)
Photochemical Assessment Monitoring Stations (PAMS). This file provides information on the numbers and distribution (latitude/longitude) of air monitoring sites which measure... -
Emissions Modeling Clearinghouse
The Emissions Modeling Clearinghouse (EMCH) supports and promotes emissions modeling activities both internal and external to the EPA. Through this site, the EPA distributes and... -
AP-42 Emissions Factors (WebFIRE)
Emissions factors have long been the fundamental tool in developing national, regional, state, and local emissions inventories for air quality management decisions and in... -
Our Nation's Air - annual air trends report, USA, EPA OAR OAQPS
Annual air trends report in the form of an interactive web application. The report features a suite of visualization tools that allow the user to: -Learn about air pollution and... -
Compliance and Emissions Data Reporting Interface (CEDRI)
EPA regulations codified in 40 CFR Part 60 and 63 require affected sources to perform emissions source tests, conduct continuous emissions monitoring, and submit compliance and... -
Criteria Air Emissions Trends
The Air Emissions Trends site provides national trends of criteria pollutant and precursor emissions data based on the the National Emissions Inventory (NEI) from 1970 - the...