An official website of the United States government.

Due to a lapse in appropriations, EPA websites will not be regularly updated. In the event of an environmental emergency imminently threatening the safety of human life or where necessary to protect certain property, the EPA website will be updated with appropriate information. Please note that all information on the EPA website may not be up to date, and transactions and inquiries submitted to the EPA website may not be processed or responded to until appropriations are enacted.

We've made some changes to If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Environmental Topics

Find the most popular pages in your topic of interest, or search the A-Z index for specific terms.

  • Air:
    • pollution and your impact
    • indoor air issues like asbestos
    • air quality research and data
    • emissions, greenhouse gases
  • Chemicals and Toxics
    • formaldehyde, mercury, other substances
    • how EPA handles spills
    • safer chemicals, TSCA
    • databases such as IRIS and SRS
  • Environmental Information by Location:
    • conditions in your state or community
    • nearby facilities or cleanup sites
  • Greener Living:
    • sustainable energy
    • transportation choices
    • food waste and recycling
    • home and business
  • Health:
    • effects of common pollutants
    • risk and exposure studies
    • asthma, children in school buildings
  • Land, Waste, and Cleanup:
    • landfills
    • hazardous waste
    • plastic and waterways
    • superfund, cleanups
  • Science:
    • methods, modeling, data and tools
    • research grants and fellowships
  • Water:
    • drinking water quality
    • watersheds and rivers
    • wastewater, stormwater, runoff
    • infrastructure finance and resilience