Learn the Issues
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Results using EPA’s Power Sector Modeling Platform v6 - May 2019 Reference Case
Download EPA's IPM v6 including documentation, overview, System Summary Report, .DAT, .RPE, .RPT files, Gas Report, State Level Emissions, Generation and Heat Input Summary.
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Documentation for EPA's Power Sector Modeling Platform v6 - Summer 2021 Reference Case
On this page you will find documentation about EPA’s Platform v6 assumptions, updates, changes, and enhancements, including the full support document as well as additional tables and attachments.
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Documentation for EPA's Power Sector Modeling Platform v6 - May 2019 Reference Case
On this page you will find documentation about EPA’s Platform v6 assumptions, updates, changes, and enhancements, including the full support document as well as additional tables and attachments.
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CSAPR Compliance Year 2021 NUSA NODAs
This page contains links to NUSA Notices of Data Availability for the CSAPR 2020 compliance year.
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CSAPR Assurance Provision
This page provides Assurance Provision Information for The Cross-State Air Pollution Rule trading programs to ensure that the emissions reductions required from each state under the trading program will occur within the state.
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Regional and State NPDES Program and Permit Quality Review (PQR) Reports
Regional NPDES Program Reviews summarize recent program findings
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Summary of Proposed NOₓ Emission Limits for Industrial Sources
Summary of Proposed NOₓ Emission Limits for Industrial Sources for the CSAPR for the 2015 Ozone NAAQS
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Manufacturer Information Module
Redesigned Manufacturer Information Module to improve industry user experience, ensure information is accurate and complete; includes introduction, redesign objectives, mockups and features of interface screens and preparation before production deployment.
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Meeting the Challenge of Cleaner Air- 2008
Read a brochure that provides an overview of the U.S.-Canada Air Quality Agreement and features recent progress made by the United States and Canada to control transboundary air pollution.
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Cleaner Air through Cooperation: Progress under the Air Quality Agreement- 2003
Read a brochure that provides an overview of the air quality agreement between the U.S. and Canada, followed by key commitments and progress, including air quality programs and scientific cooperation between the two nations.
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Monitoring Surface Water Chemistry
Learn about how EPA uses Long Term Monitoring (LTM) and Temporily Integrated Monitoring of Ecosystems (TIME) to track the effect of the Clean Air Act Amendments on acidity of surface waters in the eastern U.S.
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Historical Reports
View historical reports from EPA's Acid Rain Program, Clean Air Interstate Rule, NOx Budget Trading Program, and the OTC NOx Budget Program.
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Port Emission Inventory Guidance – Public Webinar
Overview of latest methodologies and models for planning and scoping port-related inventories to quantify air emissions from mobile sources such as ocean vessels, cargo handling equipment, onroad vehicles, and rail for regulatory or research purposes.
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NPDES Technical Resources
NPDES permit writers’ manual, tools, trainings, eNOI, applications and forms
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Authorization Status for EPA's Construction and Industrial Stormwater Programs
EPA has authorized many states to administer the NPDES stormwater permitting program, including for regulated construction- and industrial-stormwater discharges.
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Pre-Publication Version of Notice of Proposed Rulemaking for Criminal Negligence Standard for State Clean Water Act 402 and 404 Programs
The EPA Administrator signed the following notice of proposed rulemaking on December 1, 2020, and EPA is submitting it for publication in the Federal Register (FR).
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EPA’s Response to Requests for Extension of the Comment Period on the Draft 2016 Pesticide General Permit
EPA decision to not extend the comment period on the draft 2016 Pesticide General Permit.
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Instructions for Using the CGP NMFS Waters of Concern Map
Three step instructions for using the CGP NMFS Waters of Concern Map to print an image of a CGP-affected area.
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CGP Threatened and Endangered Species Eligibility Determination Flow Chart
This summary flow-chart is an at-a-glance guide to assist operators determine ESA eligibility criteria under the CGP.
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National Menu of Best Management Practices (BMPs) for Stormwater-Pollution Prevention and Good Housekeeping
EPA has found the practices listed in the menu of BMPs to be representative of the types of practices that can successfully achieve the minimum control measures.