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 | Air Data | The AirData Web site gives you access to air pollution data for the entire United States. |  |
| Chemicals On Reporting Rules (CORR) | A database containing information on chemicals which are regulated under specific sections of the Toxic Substances Control Act (TSCA) or section 313 of the Emergency Planning and Community Right -to-Know Act (EPCRA). |  |
 | Chesapeake Bay Program Data Hub | Chesapeake Bay data programs, downloads, and tools. |  |
| Emissions and Air Quality Data | This Web site presents data and summaries for with the designations of 8-hour ozone nonattainment areas. It includes data from the 1996 National Emission Trends Inventory and Emission Tracking System/Continuous Emissions Monitoring data, Census related data, air quality data and maps. |  |
 | Envirofacts Warehouse | A single point of access to select US EPA environmental data. |  |
| Environmental Monitoring and Assessment Program (EMAP) | EMAP’s goal is to translate environmental monitoring data from multiple spatial and temporal scales into assessments of ecological condition and forecasts of the future risks to the sustainability of our natural resources. |  |
 | Green Book | Maps and listings of nonattainment areas (areas of the country where air pollution levels persistently exceed the national ambient air quality standards (NAAQS) for criteria pollutants. |  |
| Photochemical Assessment Monitoring Stations (PAMS) database | Repository for data collected by Photochemical Assessment Monitoring Stations, which record air quality data for ozone (and related pollutants) in areas that are required to have enhanced ozone monitoring in place. |  |
 | RadNet | RadNet, formerly Environmental Radiation Ambient Monitoring System (ERAMS), is a national network of monitoring stations that regularly collect air, precipitation, drinking water, and milk samples for analysis of radioactivity. |  |
| US-Mexico Information Center on Air Pollution (CICA) | Contains summary ambient air quality data from monitors near the US-Mexican border for criteria and non-criteria pollutants. |  |
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| Accidental Release Information Program Database (ARIP) | Information on accidental releases of hazardous chemicals at fixed facilities. |  |
 | Air Data | The AirData Web site gives you access to air pollution data for the entire United States. |  |
| Chemicals On Reporting Rules (CORR) | A database containing information on chemicals which are regulated under specific sections of the Toxic Substances Control Act (TSCA) or section 313 of the Emergency Planning and Community Right -to-Know Act (EPCRA). |  |
 | Clean Air Markets - Data and Maps | Provides access to data on air emissions, the latest Greenhouse Gas Inventory, and Acid Deposition Data. |  |
| Envirofacts Warehouse | A single point of access to select US EPA environmental data. |  |
 | Great Lakes Regional Air Toxics Emissions Inventory | The eight Great Lakes states and the Province of Ontario are developing the first regional inventory of air toxic pollutants. Illinois, Indiana and Wisconsin have completed the Southwest Lake Michigan Pilot Study. Access the study's final report, a summary of emissions data, and also state-of-the-art software (RAPIDS) used to compile the inventory. |  |
| Hazardous Waste Data | Page containing links to RCRA databases; including Biennial Report databases and RCRIS databases. |  |
 | National Priorities List | All sites registered on Superfund's National Priorities List. |  |
| Region 3 GIS Data Library | A library of GIS data, maps, and related information for Region 3 |  |
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| Envirofacts Warehouse | A single point of access to select US EPA environmental data. |  |
 | Integrated Risk Information System (IRIS) | An electronic database containing information on human health effects that may result from exposure to various chemicals in the environment. |  |
| Listing of Fish and Wildlife Consumption Advisories | Fish consumption advisories for the United States and Canada. |  |
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| Accidental Release Information Program Database (ARIP) | Information on accidental releases of hazardous chemicals at fixed facilities. |  |
 | Clean Air Markets - Data and Maps | Provides access to data on air emissions, the latest Greenhouse Gas Inventory, and Acid Deposition Data. |  |
| Envirofacts Warehouse | A single point of access to select US EPA environmental data. |  |
 | Great Lakes Information Network | Contains maps and GIS of the Great Lakes region. |  |