Learn the Issues
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2011 Version 6.1 Technical Support Document
This TSD describes how the emission inventories were prepared for air quality modeling for the years 2011, 2018, and 2025 using the 2011, version 6.1 emissions modeling platform, which is based on the 2011 National Emissions Inventory, Version 1.
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2005 v4.1 Technical Support Document
Preparation of Emission Inventories for the Version 4.1, 2005-based Platform describes how emissions from the 2005 NEI, version 2 and were processed for air quality modeling in support of the Boiler MACT and the Mercury and Air Toxics Standards.
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2011 Version 6.0 Technical Support Document
This TSD describes how the emission inventories were prepared for air quality modeling for the years 2011, 2018, and 2025 using the 2011, version 6.0 emissions modeling platform, which is based on the 2011 National Emissions Inventory, Version 1
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2022v2 Emissions Modeling Platform Technical Support Document
This document describes how the emission inventories were prepared for air quality modeling by the U.S. Environmental Protection Agency (EPA) for criteria air pollutants to represent the year of 2022.
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McGraw-Edison Superfund Site, City of Centerville, Appanoose County, Iowa - Second Five-Year Review Report
Second Five-Year Review Report, McGraw-Edison Superfund Site, City of Centerville, Appanoose County, Iowa
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Chemplex Site, Clinton County, Iowa - Fourth Five-Year Review Report
Fourth Five-Year Review Report, Chemplex Site, Clinton County, Iowa
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Stormwater Controls-Additional Resources
Federal regulations require stormwater discharges associated with industrial activity to be covered under NPDES permits.
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Stormwater Discharges from Industrial Activities-Conditional "No Exposure" Exclusion
Federal regulations require stormwater discharges associated with industrial activity to be covered under NPDES permits.
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Stormwater Discharges from Industrial Activities-Fact Sheets and Guidance
Federal regulations require stormwater discharges associated with industrial activity to be covered under NPDES permits.
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Stormwater Discharges from Industrial Activities-Electronic Reporting
Federal regulations require stormwater discharges associated with industrial activity to be covered under NPDES permits.
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Stormwater Discharges from Industrial Activities-Threatened and Endangered Species
Federal regulations require stormwater discharges associated with industrial activity to be covered under NPDES permits.
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Stormwater Discharges from Industrial Activities-EPA's 2021 MSGP
EPA’s 2021 MSGP applies in areas of the country where EPA is the NPDES permitting authority and has made the permit available for coverage.
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Stormwater Discharges from Industrial Activities
Federal regulations require stormwater discharges associated with industrial activity to be covered under NPDES permits.
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Stormwater Discharges from Industrial Activities-EPA's Proposed 2026 MSGP
EPA’s 2021 MSGP applies in areas of the country where EPA is the NPDES permitting authority and has made the permit available for coverage.
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Animal Feeding Operations - NPDES CAFO Permitting
Most states are authorized to issue NPDES permits. The operator of a concentrated animal feeding operation (CAFO) in an authorized state should request coverage from the appropriate state agency and utilize the appropriate state forms.
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Managing Aquaculture to Protect Water Quality
Aquaculture permitting in the NPDES program. Description and resources are provided.
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Leak Detection and Flow Monitoring Devices
To help reduce water waste from leaks, EPA has developed a resource to help people understand leak detection and flow monitoring devices.
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Phosphorous Reduction in the Mystic River Watershed 101
View document(s) for the Phosphorous Reduction in the Mystic River Watershed 101 webinars.
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Community Involvement Plan for Wyckoff Eagle Harbor Superfund site
Web version of EPA's Community Involvement Plan for the Wyckoff-Eagle Harbor Superfund Site in Bainbridge Island, Washington.
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Program Updates & Accomplishments - Delaware River Partnership
updates from the Delaware Urban waters location tracking the latest news about partnership members and what they are working on