Laws & Regulations

Clean Air Act Permitting in Nevada

Information on Clean Air Act permitting in Nevada in Nevada and EPA's oversight. Clean Air Act permitting in Nevada is the shared responsibility of one state and two local agencies, along with EPA Region 9.

Hawaii PSD Agreement

Amended agreement for delegation of authority of the regulations for Prevention of Significant Deterioration (PSD) of air quality (40 CFR 52.21) between USEPA and Hawaii DOH.

Clean Air Act Permitting in Arizona

CAA permitting in Arizona is the shared responsibility of one state, three county agencies, and EPA. EPA Region 9 is responsible for processing permits on most tribal lands. Navajo Nation and Gila River Indian Community also issue some types of permits.

Affected States Notifications in EPA's Pacific Southwest

Information about Tribes approved for Treatment as a State (TAS) in EPA's Pacific Southwest (Region 9).

State Grant Policy and Guidance

Find EPA policies and guidance on grants for underground storage tank programs.

Maison Belle, LLC, CWA-01-2026-0005

Notice of Proposed Assessment of Class I Clean Water Act Section 309(g)(2)(A) Administrative Penalties and Opportunity to Comment for Maison Belle, LLC, Atkinson, NH, CWA-01-2026-0005.

Geographic Locations: New Hampshire

EPA Build America, Buy America (BABA) Act

Build America Buy America (BABA)

Build America, Buy America (BABA) Act Resources

Guidance, presentation, and resources related to the Build America, Buy America (BABA) Act.

Build America, Buy America (BABA) Act EPA Programs

This page provides information specific to each of the programs on applying to Build America Buy America.

Build America, Buy America (BABA) Withdrawn or Denied EPA Waivers

A listing of BABA waivers that recipients withdraw after public comment or that EPA denies.

Build America, Buy America (BABA) Act Overview

Overview of the Build America Buy America (BABA) Act.

WIPP 1998 Compliance Certification Documents

WIPP regulatory documents are legal documents that explain and support EPA's decision to certify that the Department of Energy has met EPA's criteria for opening the Waste Isolation Pilot Plant.

EPA Proposes to Approve Louisiana's Coal Combustion Residuals Permit Program

EPA proposed the approval of the state of Louisiana’s coal combustion residuals (CCR) permit program application.

Release Date: June 4, 2026

Specific Elements for Each of the Major SIP Types for Particulate Matter (PM)

Required elements differ depending on the type of state implementation plan (SIP).

Identification of Nonattainment Classification and Deadlines for Submission of State Implementation Plan (SIP) Provisions for the 1997 & 2006 Fine Particle National Ambient Air Quality Standards (NAAQS) Fact Sheet

This page contains the fact sheet for the Final Nonattainment Classification and Deadlines for Submission of State Implementation Plan (SIP) Provisions for the 1997 and 2006 Particulate Matter (PM) rule.

2012 PM National Ambient Air Quality Standards (NAAQS) Nonattainment Actions

Read about the EPA's infrastructure actions for the 2008 Ozone NAAQS. These actions are regarding states' failure to submit SIPs addressing various parts of the standards. Here you can read the federal register notices, fact sheets, and the docket folder.