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Environmental Topics

EPA Environmental Topics

EPA's environmental topics guides you to the most popular pages in your topic of interest.

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Air Category (image of sky and clouds)

Air

Chemicals and Toxics Category

Chemicals, Pesticides, and Toxics

Chemicals, Pesticides, and Toxics Topics

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Health

Land Waste and Cleanup Category

Land, Waste, and Cleanup

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Science

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Water

Water

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EPA Articles and News Releases

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Recent EPA News Releases:

ICYMI: EPA’s New Guidance Removes Requirement for Diesel Exhaust Fluid (DEF) Sensors, Saves American Operators Billions

On Friday, March 27, 2026, President Trump announced U.S. EPA Administrator Lee Zeldin has issued new guidance making it clear DEF sensors are no longer required, and NOx sensors can be used instead to meet regulatory requirements.
- Release Date: March 31, 2026
Advancing Cooperative Federalism, EPA Enters into New Partnership with the Association of State and Territorial Health Officials, Environmental Council of the States to Collaborate on Environmental Health Projects

EPA announced a five-year Memorandum of Agreement with the Association of State and Territorial Health Officials (ASTHO) and the Environmental Council of the States (ECOS) to collaborate on environmental health projects.
- Release Date: March 31, 2026
EPA Concludes Drinking Water Has Been Free of Fuel Contamination Since 2022, in Wake of Red Hill Release

Following rigorous assessment of public water systems impacted by 2021 Red Hill fuel release, EPA issues final drinking water report

U.S. EPA is releasing its final drinking water report on the Joint Base Pearl Harbor-Hickam (JBPHH) and Aliamanu Military Reservation (AMR) public water systems, which were impacted by the 2021 fuel release from the Red Hill Bulk Fuel Storage Facility.
- Release Date: March 31, 2026
What They Are Saying: Leaders Across America Commend EPA’s Action to Finalize Historic Renewable Fuel Standards and Support America’s Rural Communities

On Friday, March 27, 2026, at the White House Great American Agriculture Celebration on the South Lawn, President Trump announced that U.S. Environmental Protection Agency (EPA) has finalized the historic Renewable Fuel Standard (RFS) “Set 2” final rule.
- Release Date: March 30, 2026

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