Regulations last checked for updates: Feb 21, 2025

Title 40 - Protection of Environment last revised: Nov 21, 2025

INTRODUCTION
APPLICABILITY
EMISSION LIMITS
GENERAL COMPLIANCE REQUIREMENTS
MONITORING
REPORTING
PERFORMANCE TESTS
DEFINITIONS
authority: 42 U.S.C. 7401
source: 36 FR 24877, Dec. 23, 1971, unless otherwise noted.