Regulations last checked for updates: Jan 30, 2025

Title 40 - Protection of Environment last revised: Nov 08, 2025
authority: Secs. 301, 304(g), 307, 308, 309, 402, 405, 501(a), Clean Water Act, as amended, (33 U.S.C. 1311,1314,1317,1318,1319,1322,1325
source: 46 FR 9467, Jan. 28, 1981, unless otherwise noted.