---
kind: "unit"
title: "33"
title_heading: "Navigation and Navigable Waters"
key: "ch53"
level: "chapter"
label: "Chapter 53"
heading: "Harmful Algal Bloom and Hypoxia Research and Control"
release: "119-102"
date: "2026-07-12"
url: "https://uscodex.org/usc/33/ch53"
sections_count: 12
---

# Chapter 53 — Harmful Algal Bloom and Hypoxia Research and Control

Title 33 — Navigation and Navigable Waters

## Sections

- [§4001. Assessments](/usc/33/4001.md)
- [§4001a. Consultation required](/usc/33/4001a.md)
- [§4002. National harmful algal bloom and hypoxia program](/usc/33/4002.md)
- [§4003. Comprehensive research plan and action strategy](/usc/33/4003.md)
- [§4004. Northern Gulf of Mexico hypoxia](/usc/33/4004.md)
- [§4004a. South Florida harmful algal blooms and hypoxia](/usc/33/4004a.md)
- [§4005. Great Lakes hypoxia and harmful algal blooms](/usc/33/4005.md)
- [§4006. Protection of States’ rights](/usc/33/4006.md)
- [§4007. Effect on other Federal authority](/usc/33/4007.md)
- [§4008. Definitions](/usc/33/4008.md)
- [§4009. Authorization of appropriations](/usc/33/4009.md)
- [§4010. Hypoxia or harmful algal bloom of national significance](/usc/33/4010.md)