---
kind: "unit"
title: "42"
title_heading: "The Public Health and Welfare"
key: "ch6A/schXII/ptB"
level: "part"
label: "Part B"
heading: "Public Water Systems"
release: "119-102"
date: "2026-07-12"
url: "https://uscodex.org/usc/42/ch6A-schXII-ptB"
sections_count: 11
---

# Part B — Public Water Systems

Title 42 — The Public Health and Welfare › Chapter 6A — Public Health Service › Subchapter XII — Safety of Public Water Systems

## Sections

- [§300g. Coverage](/usc/42/300g.md)
- [§300g–1. National drinking water regulations](/usc/42/300g-1.md)
- [§300g–2. State primary enforcement responsibility](/usc/42/300g-2.md)
- [§300g–3. Enforcement of drinking water regulations](/usc/42/300g-3.md)
- [§300g–4. Variances](/usc/42/300g-4.md)
- [§300g–5. Exemptions](/usc/42/300g-5.md)
- [§300g–6. Prohibition on use of lead pipes, solder, and flux](/usc/42/300g-6.md)
- [§300g–7. Monitoring of contaminants](/usc/42/300g-7.md)
- [§300g–8. Operator certification](/usc/42/300g-8.md)
- [§300g–9. Capacity development](/usc/42/300g-9.md)
- [§300g–10. Cybersecurity support for public water systems](/usc/42/300g-10.md)