Regulatory and Guidance Information By Topic | US EPA
Oct 10, 2025 · EPA develops and enforces regulations that span many environmental topics, from acid rain reduction to wetlands restoration. Each topic listed below may include related laws …
Climate Change | US EPA
Oct 20, 2025 · Comprehensive information from U.S. EPA on issues of climate change, global warming, including climate change science, greenhouse gas emissions data, frequently asked …
EPA Organization Chart | US EPA
Nov 21, 2025 · Organization chart, showing how the different Headquarters offices and Regional offices of the EPA are structured, & providing contact information
EPA in Your State | US EPA
Apr 16, 2025 · EPA in Your State Learn what EPA is doing in your state or territory by selecting from the drop-down menu or clicking on the map.
Regional and Geographic Offices | US EPA
Oct 7, 2025 · Regional Offices Offices with a Geographic Focus Regional Offices We have ten Regional offices, each of which is responsible for the execution of our programs within several …
Environmental Topics | US EPA
5 days ago · EPA's resources on environmental issues include research, basics, what you can do, and an index covering more specific terms.
Air Topics | US EPA
Dec 11, 2025 · Information about indoor and outdoor air quality, air monitoring and air pollutants.
EPA Region 9 (Pacific Southwest)
Dec 16, 2025 · EPA’s Pacific Southwest (Region 9) implements and enforces federal environmental laws in Arizona, California, Hawaii, Nevada, the Pacific Islands, and 148 Tribal …
EPA Region 10 (Pacific Northwest) | US EPA
Apr 22, 2025 · Information about EPA's Region 10 office, serving Alaska, Idaho, Oregon, Washington, and 271 native Tribes.
Lead | US EPA
Dec 8, 2025 · Learn about the health effects of lead, who is at risk, how to test for lead in paint or other areas of your home, how to find or become a lead-safe certified firm, and more about the …