Regulations last checked for updates: Apr 03, 2025

Title 40 - Protection of Environment last revised: Nov 03, 2025
authority: Secs. 301, 304 (b) and (c), 306 (b) and (c), 307(c), of the Federal Water Pollution Control Act, as amended; 33 U.S.C. 1251,1311,1314,1316,1317; 86 Stat. 816