Learn the Issues
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NPDES SSO Technical Reports and Materials
Series of documents for evaluating Capacity, Management, Operation, and Maintenance (CMOM) Programs and operation and maintenance of Sanitary Sewer Collection Systems.
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Secondary Treatment Standards
Secondary treatment standards for POTWs
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NPDES Integrated Planning Documents
Integrated municipal stormwater and wastewater planning documents
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National Pretreatment Program Variances
Overview of types of variances that can be granted for pretreatment standards.
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NPDES WET Case Studies
Case studies report evaluating relationship of whole effluent toxicity to biological impacts in a freshwater system.
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NPDES Watershed-Based Permitting Guidance
Documents with additional guidance for NPDES Watershed-Based Permitting.
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NPDES WET Test Method Video Fact Sheets
EPA developed these DVDs as an important training tool for regional and state NPDES permit writers and laboratories to use as part of their program implementation.
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NPDES CSO Reports to Congress
Listing of Reports to Congress filed by EPA in regards to Combined Sewer Overflows
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Central Tenets of the NPDES Permitting Program
Central tenets of the National Pollutant Discharge Elimination System (NPDES) permitting program.
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Secondary Treatment Standards
Secondary treatment standards resources for NPDES permitees.
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NPDES Industrial Stormwater Endangered and Threatened Species Documents
Documents related to industrial stormwater and its effects on endangered and threatened species.
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NE Fremont Street Green Street Project
Stormwater retrofit of an existing residential collector street – demonstration project.
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NPDES Pesticide Applications Fact Sheets
A collection of NPDES Pesticide Applications fact sheets on for-hire applicators, pesticide general permit for agricultural stakeholders, notices of intent, and mosquito control activities.
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NPDES PGP eNOI Tutorials
EPA has developed tutorials to walk you through the process of submitting NOIs, NOTs and Annual Reports.
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NPDES Permit Writers' Manual for Concentrated Animal Feeding Operations
This manual is designed to provide general information on the CWA and NPDES requirements for CAFOs, explain CAFO permitting, and provide technical information to understand options for nutrients management planning.
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NPDES SSO FAC Documents
Series of documents by the Urban Wet Weather Flows Federal Advisory Committee providing review and analysis of water quality issues.
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NPDES SSM Fact Sheet
Use of sufficiently sensitive test methods for permit applications and reporting factsheet.
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Mandestrobin Petition and Response
Petition and Response documents for Mandestrobin
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NPDES Water-Quality Based Permit Limits for Recreational Water Quality Criteria
This set of Frequently Asked Questions (FAQ) provides an overview of NPDES permitting applicable to continuous dischargers.
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Pollutants in Publicly Owned Treatment Works Pretreatment Standards; 40 CFR Part 128 Pretreatment Standards
Documents related to pollutants in publicly owned treatment works pretreatment standards; 40 CFR part 128 pretreatment standards.