Regulations last checked for updates: Jan 18, 2025

Title 40 - Protection of Environment last revised: Dec 30, 2025

INTRODUCTION
APPLICABILITY AND DELEGATION OF AUTHORITY
PRECONSTRUCTION SITING ANALYSIS
OPERATOR TRAINING AND QUALIFICATION
EMISSION LIMITS, EMISSION STANDARDS, AND OPERATING LIMITS AND REQUIREMENTS
INITIAL COMPLIANCE REQUIREMENTS
CONTINUOUS COMPLIANCE REQUIREMENTS
PERFORMANCE TESTING, MONITORING, AND CALIBRATION REQUIREMENTS
RECORDKEEPING AND REPORTING
TITLE V OPERATING PERMITS
DEFINITIONS
authority: 42 U.S.C. 7401
source: 36 FR 24877, Dec. 23, 1971, unless otherwise noted.