Regulations last checked for updates: Apr 20, 2024

Title 40 - Protection of Environment last revised: Jun 26, 2024
authority: Secs. 101; 301; 304(b), (c), (e), and (g); 306; 307; 308 and 501, Clean Water Act (Federal Water Pollution Control Act Amendments of 1972, as amended; 33 U.S.C. 1251; 1311; 1314(b), (c), (e), and (g); 1316; 1317; 1318 and 1361)
source: 47 FR 52304, Nov. 19, 1982, unless otherwise noted.