Laws & Regulations

Energy and Environment Guide to Action 2015 Edition

Presents in-depth information about state policies and best practices used to meet energy, environmental, and economic objectives.

Discover the History of the Clean Water Act

Explore an interactive StoryMap and learn about the history of the Clean Water Act.

Federal Register Citations - MATS

list of FR citations mats

How to Apply

State Authorization Rule Checklists 247 to 249 for Hazardous Waste Rulemakings Published Between July 2024 and June 2025

Rules, checklists, summaries and Federal Register Notice links related to State Program Advisory 42.

Delegations of New Source Performance Standards (NSPS) and National Emission Standards for Hazardous Air Pollutants (NESHAP) in the Pacific Northwest

Clean Air Act Title V program reviews conducted by EPA for delegated and approved permitting programs in Region 10 (Alaska, Idaho, Oregon, Washington.)

Transfer and Cross‐Collateralization of Clean Water State Revolving Funds and Drinking Water State Revolving Funds

Link containing Federal laws and Executive Orders, including cross-cutting federal authorities, apply to projects and activities receiving assistance under the Clean Water State Revolving Fund (CWSRF) program.

WIFTA Questions and Answers

WIFTA questions and answers

DWSRF Resources for Water Utilities

This page contains links and summaries of DWSRF resources.

Deviation from 40 CFR §35.3520(e)(2) for the Groundwater Source Development Project for Mores Creek Rim Ranches Water District, Idaho (2018)

req for a deviation from 40 CFR Part 35.3520(e)(2), which prohibits DWSRF financing of water rights. The deviation will allow the state of ID to use DWSRF funds for a water rights purchase, which would then allow the Mores Creek Rim Ranches Water District

Deviation from 40 CFR Part 35.3520(e)(2) for the Well Relocation Project for Oshkosh, Nebraska, and the North Douglas Regional Intertie Project for Carson City, Nevada (2018)

The deviation will allow the state of Nebraska to use DWSRF funds for a water transfer permit fee from the North Platte Natural Resource District, which would then allow the City of Oshkosh to withdraw water from new wells in the Blue Creek drainage basin.

DWSRF Class Deviation for Water Rights [Deviation from 40 CFR §35.3520(e)(2)] (2019)

Deviation from 40 CFR 35.3520(e)(3) for Off-Stream Reservoir in Defiance, Ohio (2001)

This memo responds to the request for a deviation from 40 CFR 35.3520(e)(3), which prohibits DWSRF financing of reservoirs.

Deviation from 40 CFR 35.3520(e)(3) for Raw Water Reservoir/Settling Basin in Anahuac, Texas (2007)

This memo responds to the request for a deviation from 40 CFR 35.3520 (e)(3), which prohibits DWSRF financing of reservoirs.

Developing Water System Partnerships with the DWSRF (EPA 816-F-21-002)

This fact sheet describes DWSRF eligibilities related to water system partnerships.

Addressing Water Affordability with the DWSRF (EPA 816-F-21-007)

This fact sheet describes ways the DWSRF can help address water affordability.

EPA Approved New Jersey Source-Specific Requirements

This section sets forth the applicable State Implementation Plan (SIP) for New Jersey under section 110 of the Clean Air Act, as amended, 42 U.S.C. 7401 et seq., and 40 CFR part 51 to meet National Ambient Air Quality Standards.

Analysis of the Final MATS Risk and Technology Review (RTR)

IPM analyses of the Proposed MATS Risk and Technology Review (RTR)

Results using Pre-IRA 2022 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.

Supporting Documentation of the 2015 Ozone NAAQS Actions

IPM analyses of the Good Neighbor Plan.