Air Quality Monitoring Standards

Begin Actual Construction in the New Source Review Preconstruction Permitting Program

Tier 4 Criteria Pollutant Standards, Part 1: Phase-In Schedule for Light-Duty and Medium-Duty Vehicles

Effluent Limitations Guidelines and Standards for the Steam Electric Power Generating Point Source Category: Unmanaged Combustion Residual Leachate

Extending the Compliance Deadline for the PFOA and PFOS Maximum Contaminant Levels; Notice of Public Hearing

National Emission Standards for Hazardous Air Pollutants: Crude Oil and Natural Gas Production Facilities and Natural Gas Transmission and Storage Facilities; Technology Review and Reconsideration

Ozone Reclassification State Implementation Plan Rule

Louisiana: Approval of State Coal Combustion Residuals Permit Program

Environmental Impact Statements; Availability, etc.

EPCRA Hazardous Chemical Inventory Reporting Requirements: Conformity with the 2024 OSHA Hazard Communication Standard

Hearings, Meetings, Proceedings, etc.: Science Advisory Committee on Chemicals Peer Review; 1,2-dichloropropane (1,2-DCP); 1,1,2-trichloroethane (1,1,2-TCA); trans-1,2-dichloroethylene (tDCE); etc.

Clean Air Act Operating Permit Program: Petition for Objection to State Operating Permit for Lubrizol Corp., Harris County, TX

Air Quality State Implementation Plans; Approvals and Promulgations: Oregon; Update to Materials Incorporated by Reference