Regulations last checked for updates: Sep 29, 2023

Title 40 - Protection of Environment last revised: Sep 27, 2023
authority: Secs. 301, 304 (b) and (c), 306 (b) and (c), 307(c), and 316(b) of the Federal Water Pollution Control Act, as amended; 33 U.S.C. 1251,1311,1314,1316,1317; 86 Stat. 816
source: 39 FR 2565, Jan. 22, 1974, unless otherwise noted.