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Request for AIS Waiver for Ductile Iron Threaded Companion Flanges for Great Falls, Montana

AIS waiver request.

Project Waiver of the American Iron and Steel Requirements to the Metropolitan District in Connecticut for Mechanical Joint Adapter Bells

AIS project waiver.

Request for AIS Waiver for Butterfly Valves for Wolsey, South Dakota (DWSRF)

AIS Waiver Request received

Project Waiver of AIS Requirements for Pressure Kits for Tap Saddles for the City of Pomona, Kansas (CWSRF)

AIS waiver approved.

Procedures for Implementing Environmental Federal Cross-Cutting Authorities in the Clean Water and Drinking Water State Revolving Fund Programs

This memorandum clarifies procedures for applying federal environmental cross-cutting authorities to projects and activities receiving assistance under the Clean Water and Drinking Water State Revolving Funds.

Project Waiver of AIS Requirements for Butterfly Valves for Wolsey, South Dakota (DWSRF)

AIS waiver request approval.

Project Waiver of American Iron and Steel Requirements to the Metropolitan Water Reclamation District of Greater Chicago in Illinois for Duplex Basket Strainers

Approval of AIS waiver request.

Project Waiver of American Iron and Steel Requirements to the Sacramento Regional County Sanitation District in California for Expansion Joint Shear Dowels

Approved AIS project waiver.

Environmental Benefits of Clean Water State Revolving Fund Green Infrastructure Projects

This collection of case studies explores the efforts of five CWSRF assistance recipients to monitor or model the environmental benefits of green infrastructure practices.

Request for AIS Waiver for Wafer-Style Check Valves for Wolsey, South Dakota (DWSRF)

AIS Waiver Request

Project Waiver of AIS Requirements for 16-inch Plug Valves for Douglas, Georgia (CWSRF)

AIS waiver approved.

Public Interest Waiver of the American Iron and Steel Requirements to Butte-Silver Bow County, Montana for Transition Couplings

Waiver to AIS Requirements.

EPA to hold a public meeting on revised proposed plan for the Kerr-McGee Chemical Corporation Superfund Site

EPA to hold a public meeting on revised proposed plan for the Kerr-McGee Chemical Corporation Superfund Site

• Release Date: July 24, 2025

Livestock Anaerobic Digester Database

The Anaerobic Digester Database provides basic information about anaerobic digesters on livestock farms in the United States, organized in Excel spreadsheets. It includes projects that are under construction, operating, or shut down.

Energy Efficiency/Renewable Energy Programs in State Implementation Plans - Guidance Documents

final document that provides guidance to States and local areas on quantifying and including emission reductions from energy efficiency and renewable energy measures in State Implementation Plans (SIPS).

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