Laws & Regulations

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.

Results using 2023 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.

Proposed CSAPR Close-Out

This page includes information on the determination regarding Good Neighbor Obligations for the 2008 Ozone National Ambient Air Quality Standard.

Cross-State Air Pollution Revisions Rules

Revisions and adjustments made to the Cross-State Air Pollution Rule

NOx Ozone Season Group 3 Trading Program under the Revised Cross-State Air Pollution Rule (CSAPR) Update

Revised CSAPR Update 2021 dates

Cross-State Air Pollution Rule (CSAPR) State Budgets, Variability Limits, and Assurance Provisions

These updated tables incorporate all adjustments finalized in the Supplemental Notice of Final Rulemaking (December 2011), the February Revisions Rule (February 7, 2012), and the June Revisions Rule (June 5, 2012) for the CSAPR for SO2, NOx and Ozone