Learn the Issues

Preventing the Spread of Respiratory Viruses in Public Indoor Spaces

EPA recommends multifaceted, layered approach to reduce the risk of indoor airborne transmission of COVID-19.

Region 7 Land Revitalization Resources

Region 7 land revitalization resource links.

Respiratory Viruses, Wildfires, and Indoor Air Quality

Learn where to find information related to COVID-19, wildfires and indoor air quality.

B701 PRIA Fee Category

PRIA fee determination for B701 fee category

Air Cleaners, HVAC Filters, and Respiratory Viruses

EPA recommends precautions to reduce the potential airborne transmission of the virus, such as ventilation and air filtration as a part of a larger strategy that includes minimizing close contact, surface cleaning, handwashing, and other precautions.

RTOC Meeting Materials: Summer 2026

Documents related to the Winter 2026 Regional Tribal Operations Committee (RTOC) meeting in EPA's Pacific Southwest, Region 9.

PRIA Fee Category Table - Inert Ingredients

PRIA fee fee category table for inert ingredients

Learn about Indoor Air Quality

List of links to learn about indoor air quality.

PSD Permit Actions for District of Columbia

Information on current PSD permitting actions in D.C.

Clean Air Act Permitting in Hawai'i and Pacific Islands

Information on EPA Pacific Southwest (Region 9) oversight of Clean Air Act (CAA) permitting in Hawai'i and the Pacific Islands.

Monitoring, Assessment and TMDLs: Pacific Islands

An overview of monitoring, assessment and TMDLs in America Samoa, the Commonwealth of the Northern Mariana Islands and Guam.

Monitoring by Control Technique - Wet Scrubber For Particulate Matter - Documents

Document page for Monitoring by Control Technique - Wet Scrubber For Particulate Matter

Monitoring by Control Technique - Wet Scrubber For Particulate Matter

Stationary source emissions monitoring is required to demonstrate that a source is meeting the requirements in Federal or state rules. This page is about Wet Scrubber For Particulate Matter controls used to reduce pollutant emissions.

Printing and Publishing Monitoring Information -Documents

Printing and Publishing Monitoring Information - Document page

Printing and Publishing - Documents

Printing and Publishing - Documents Page

Monitoring by Control Technique - Electrified Filter Bed - Document

Monitoring by Control Technique - Electrified Filter Bed - Document page

Air Emissions Monitoring for Permits - Documents

Air Emissions Monitoring for Permits - Document page

Regional Highlight - Alaska Lakes Study

NLA 2012 Highlight - Alaska Lakes Study

National Aquatic Resource Surveys

EPA reports information on the condition of our nation's waters using probabilistic surveys. The National Aquatic Resource Surveys assess the status of and changes in water quality of the nation's coastal waters, lakes, rivers and streams, and wetlands.