Regulations last checked for updates: Nov 21, 2024

Title 40 - Protection of Environment last revised: Nov 19, 2024
authority: Subpart A, issued under Sec. 505, Clean Water Act, as amended 1987; Sec. 504, Pub. L. 100-4; 101 Stat. 7 (33 U.S.C. 1365). Subpart B, issued under Sec. 1449, Safe Drinking Water Act (42 U.S.C. 300j-8)
source: 38 FR 15040, June 7, 1973, unless otherwise noted.