Learn the Issues

Tribal Consultation in EPA's Pacific Southwest (Region 9)

These documents are intended as communication tools for EPA's Pacific Southwest (Region 9). They describe how Region 9 generally has approached consultation and coordination with tribal governments when addressing matters other than enforcement.

Section 15: Surface Water - Ground Water to Surface Water Component

Learn about surface water targets, which can be threatened by the release of contaminated ground water.

Lead at Superfund Sites: Frequent Questions from the General Public

Read frequent questions and answers about lead from the general public.

Air Toxics Screening Assessment

The Air Toxics Screening Assessment, or AirToxScreen, is EPA's review of air toxics in the United States, based on modeled air quality. We developed AirToxScreen as a tool for state, local and tribal agencies, and we use its results as well.

SERC-TERC Update: February 2023

SERC-TERC Update: January 2023

SERC-TERC Updates: April 2025

April SERC newsletter

National Security Memoranda and Presidential Directives

Three of these directives directly affect EPA's role in the national emergency response system: HSPD-5 Management of Domestic Incidents; HSPD-7 Critical Infrastructure Identification, Prioritization, and Protection; and HSPD-8 National Preparedness.

Superfund Redevelopment Basics

Become involved in the redevelopment of a Superfund site with tools and resources about reuse planning support and technical assistance, partnerships, reuse success stories, policy, and guidance.

Technical Assistance at the Colonial Creosote Superfund Site in Louisiana

Details about the public meeting on April 9, 2026, to provide information about technical assistance opportunities for the community living near the Colonial Creosote Superfund site in Bogalusa, Louisiana.

Date: April 9, 2026

NPDES Permits around the Nation

Find National Pollutant Discharge Elimination System (NPDES) wastewater permits issued by EPA across the nation.

Ozone-Depleting Substances

Learn about ozone-depleting substances, including what they are and how they contribute to ozone layer depletion and climate change.

AVoided Emissions and geneRation Tool (AVERT)

Use AVERT to estimate the regional, state, and county PM2.5, NOX, SO2, CO2, NH3, and VOC emissions impacts of energy efficiency and renewable energy policies. Designed to help air quality planners, energy office and PUC staff evaluate policies.

CO-Benefits Risk Assessment Health Impacts Screening and Mapping Tool (COBRA)

Use COBRA to explore and map how changes in air pollution (PM2.5, S02, NOX, NH3, VOCs) from clean energy policies and programs affect human health at the county, state, regional, or national levels. Estimate the economic value of these health benefits.