CFR›Title 40›Chapter I›Part 501 ContainsSubparts A–CCorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 PART 501—STATE SLUDGE MANAGEMENT PROGRAM REGULATIONS Subparts A Subpart A—Purpose, Scope and General Program Requirements Sections 501.1–501.3 B Subpart B—Development and Submission of State Programs Sections 501.11–501.25 C Subpart C—Program Approval, Revision and Withdrawal Sections 501.31–501.34 Authority33 U.S.C. 1251 et seq.Source54 FR 18786, May 2, 1989, unless otherwise noted. Previous 471 Part 471—Nonferrous Metals Forming and Metal Powders Point Source Category Next 503 Part 503—Standards for the Use or Disposal of Sewage Sludge