---
kind: "unit"
title: "42"
title_heading: "The Public Health and Welfare"
key: "ch6A/schXII"
level: "subchapter"
label: "Subchapter XII"
heading: "Safety of Public Water Systems"
release: "119-102"
date: "2026-07-12"
url: "https://uscodex.org/usc/42/ch6A-schXII"
sections_count: 68
---

# Subchapter XII — Safety of Public Water Systems

Title 42 — The Public Health and Welfare › Chapter 6A — Public Health Service

## Contents

- [Part A — Definitions](/usc/42/ch6A-schXII-ptA.md)
- [Part B — Public Water Systems](/usc/42/ch6A-schXII-ptB.md)
- [Part C — Protection of Underground Sources of Drinking Water](/usc/42/ch6A-schXII-ptC.md)
- [Part D — Emergency Powers](/usc/42/ch6A-schXII-ptD.md)
- [Part E — General Provisions](/usc/42/ch6A-schXII-ptE.md)
- [Part F — Additional Requirements To Regulate Safety of Drinking Water](/usc/42/ch6A-schXII-ptF.md)