Learn the Issues
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Section 4: Source Characterization
Learn about source characterization for Superfund sites. Although the Hazard Ranking System (HRS) is designed to score releases and sites, sources and areas of observed contamination play a crucial role in determining HRS pathway scores.
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Section 3: HRS Structure
Read about the the four pathways for evaluating a Hazard Ranking System (HRS) score: ground water migration, surface water migration, soil exposure, and air migration.
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Section 2: Site Assessment Process
Learn about the multi-step process leading to the final National Priorities List (NPL) listing decision, which begins when a site is discovered and listed in CERCLIS.
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Section 1: Regulatory Context of the HRS
Learn about the regulatory context of the Hazard Ranking System (HRS), the primary tool that EPA uses to place sites on the National Priorities List (NPL).
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EPA to Hold Training and Open House on August 29 for Michner Plating-Mechanic Street Superfund Site in Jackson, Michigan
EPA News Release: EPA to Hold Training and Open House on August 29 for Michner Plating-Mechanic Street Superfund Site in Jackson, Michigan
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Example Maps for Exploring Brownfields
This set of maps focuses on one area wide planning grant in the City of Wilmington, DE to address brownfields clean-up and area revitalization using EnviroAtlas data.
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Clean Water Act Programs Utilizing the Definition of WOTUS
Information regarding programs to which the definition of waters of the United States applies.
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Audit Policy Sample Disclosure Follow-up Letter
The Agency will send follow-up communications to a company after receiving a self-disclosure pursuant to EPA's Audit Policy.
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Drinking Water Distribution System Tools and Resources
draft only - distribution system resources
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EPA Appoints New Members to the FIFRA Scientific Advisory Panel
EPA has appointed a new chair and two new members and reappointed two current members to serve on the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) Scientific Advisory Panel (SAP).
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Project Waiver of AIS Requirements for Three-way Converging Valve for City of Nampa, Idaho (CWSRF)
AIS waiver request approval.
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Project Waiver of AIS Requirements for Air Flow Valves for City of Lancaster, Ohio (CWSRF)
AIS waiver request approval.
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Staff Manuals
Staff manuals.
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Administrative Opinions
Final opinions, including concurring and dissenting opinions, as well as orders, made in the adjudication of cases.