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Laws & Regulations

Final NPDES Permit for Arecibo RWWTP for Guaynabo, Puerto Rico

Below are EPA's National Pollutant Discharge Elimination System (NPDES) final permit and supporting documents for Arecibo RWWTP.
EPA Approved New Hampshire Source-Specific Requirements

EPA Approved New Hampshire Source-Specific Requirements
EPA Approved Nonregulatory Provisions and Quasi-Regulatory Measures in the Maine SIP

EPA Approved Nonregulatory Provisions and Quasi-Regulatory Measures in the Maine SIP
Approved Air Quality Implementation Plans in Region 1

Read about the approved State Implementation Plans, Tribal Implementation Plans, as well as any Federal Implementation Plans for Region 1.
EPA Approved Nonregulatory Provisions and Quasi-Regulatory Measures in the Rhode Island SIP

EPA Approved Nonregulatory Provisions and Quasi-Regulatory Measures in the Rhode Island SIP
EPA Approved Regulations in the Oregon SIP

Table of contents for EPA-approved regulations in Oregon's air quality State Implementation Plan (SIP).
Technical Corrections for GHG Reporting

Technical Corrections
Operating Permit Timeline for New Mexico or Albuquerque

Part 70 Title V Operating Permit Timeline for New Mexico
Paying PRIA Application Fees

pria fees
National Study of Chemical Residues in Lake Fish Tissue Results

Data collection to inform fish advisories and safe eating guidelines - National Study of Chemical Residues in Lake Fish Tissue Results
Oklahoma Regulation 1.4.2 Construction Permit, SIP effective June 14, 2017 (OKd21) -- Applicable to minor NSR permitting under OAC 252:100-8 only. NOT IN SIP effective August 3, 2026 (OKd40)

Oklahoma SIP: OK Regulation 1.4.1 General Permit Requirements
Oklahoma Regulation 1.4.1 General Permit Requirements, SIP effective June 14, 2017 (OKd21) -- Applicable to minor NSR permitting under OAC 252:100-8 only. NOT IN SIP effective August 3, 2026 (OKd40)

Oklahoma SIP: OK Regulation 1.4.1 General Permit Requirements
EPA Approved Regulations in Oklahoma SIP effective January 3, 2000 (OKc48) to August 2, 2026

Current EPA-Approved Regulations in the Oklahoma SIP
Federal Register Notices and State Authorization Tracking System (StATS) Reports for State Authorization under the Resource Conservation and Recovery Act

Authorization Federal Register Notices and state authorization activity.
FY 2026 U.S. Chemical Safety and Hazard Investigation Board Management Challenges

At a Glance, December 6, 2026. The OIG is required by statute to prepare an annual report summarizing what the OIG considers the “most serious management and performance challenges facing the agency.”
Underground Storage Tank (UST) Inspector Training

This page provides links and instructions to the UST-LUST virtual classroom through EPA's National Enforcement Training Institutes eLearning Center Training Catalog
Suspected Release Investigation, Confirmation of Releases (Prevention Program Activities), and Closure

This page describes the steps related to a suspected release investigation and confirmation of releases.
Disposal of Coal Combustion Residuals from Electric Utilities Rulemakings

The EPA finalized national regulations to provide for the safe disposal of coal combustion residuals (CCR) from coal-fired power plants
Final Error Corrections Rule

This is the final Error Corrections Rule to correct minor errors in four NSR regulations.
Carbon Tetrachloride Scope Document and Supplemental Files

scope document and supplemental files for carbon tetrachloride

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