Learn the Issues
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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 Federal Register Notice: Applying the Supreme Court’s County of Maui v. Hawaii Wildlife Fund Decision in the Clean Water Act Section 402 National Pollutant Discharge Elimination System Permit Program
PRE-PUBLICATION NOTICE. The EPA Assistant Administrator for the Office of Water, signed the following document on December 4, 2020, and EPA is submitting it for publication in the Federal Register (FR).
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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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NPDES Permit Basics
Answers to questions like what is an NPDES permit, what is a pollutant, do I need an NPDES permit, etc.
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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.
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Hazardous Waste Cleanup: Defense Distribution Center - Susquehanna Facility in New Cumberland, Pennsylvania
RCRA Corrective Action Site Defense Distribution Center Susquehanna, (Formerly: Defense Depot Susquehanna PA) , New Cumberland PA
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Hazardous Waste Cleanup: U.S. Naval Support Activity (Formerly: National Naval Medical Center) in Bethesda, Maryland
MD4170024687 RCRA Corrective Action Site US Naval Support Activity, Bethesda, MD (Formerly: National Naval Medical Center: NNMC)
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Why is it difficult to establish a link between cancers or other illnesses and environmental exposures?
The complex nature of cancer makes it inherently challenging to identify, interpret, and address cancer clusters. Cancer is a term describing different diseases that share a similar characteristic: uncontrollable cell growth and division. As a group, cancers are very common. Cancers are the second leading cause of death in the…