---
kind: "unit"
title: "40"
title_heading: "Protection of Environment"
key: "chI/subchO/part503"
level: "part"
label: "Part 503"
heading: "Standards for the Use or Disposal of Sewage Sludge"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/40/chI-subchO-part503"
sections_count: 40
---

# Part 503 — Standards for the Use or Disposal of Sewage Sludge

Title 40 C.F.R. — Protection of Environment › Chapter I — Environmental Protection Agency › Subchapter O — Sewage Sludge

## Contents

- [Subpart A — General Provisions](/cfr/40/chI-subchO-part503-subpartA.md)
- [Subpart B — Land Application](/cfr/40/chI-subchO-part503-subpartB.md)
- [Subpart C — Surface Disposal](/cfr/40/chI-subchO-part503-subpartC.md)
- [Subpart D — Pathogens and Vector Attraction Reduction](/cfr/40/chI-subchO-part503-subpartD.md)
- [Subpart E — Incineration](/cfr/40/chI-subchO-part503-subpartE.md)