---
kind: "unit"
title: "42"
title_heading: "The Public Health and Welfare"
key: "ch85/schIV–A"
level: "subchapter"
label: "Subchapter IV–A"
heading: "Acid Deposition Control"
release: "119-102"
date: "2026-07-12"
url: "https://uscodex.org/usc/42/ch85-schIV-A"
sections_count: 16
---

# Subchapter IV–A — Acid Deposition Control

Title 42 — The Public Health and Welfare › Chapter 85 — Air Pollution Prevention and Control

## Sections

- [§7651. Findings and purposes](/usc/42/7651.md)
- [§7651a. Definitions](/usc/42/7651a.md)
- [§7651b. Sulfur dioxide allowance program for existing and new units](/usc/42/7651b.md)
- [§7651c. Phase I sulfur dioxide requirements](/usc/42/7651c.md)
- [§7651d. Phase II sulfur dioxide requirements](/usc/42/7651d.md)
- [§7651e. Allowances for States with emissions rates at or below 0.80 lbs/mmBtu](/usc/42/7651e.md)
- [§7651f. Nitrogen oxides emission reduction program](/usc/42/7651f.md)
- [§7651g. Permits and compliance plans](/usc/42/7651g.md)
- [§7651h. Repowered sources](/usc/42/7651h.md)
- [§7651i. Election for additional sources](/usc/42/7651i.md)
- [§7651j. Excess emissions penalty](/usc/42/7651j.md)
- [§7651k. Monitoring, reporting, and recordkeeping requirements](/usc/42/7651k.md)
- [§7651l. General compliance with other provisions](/usc/42/7651l.md)
- [§7651m. Enforcement](/usc/42/7651m.md)
- [§7651n. Clean coal technology regulatory incentives](/usc/42/7651n.md)
- [§7651o. Contingency guarantee, auctions, reserve](/usc/42/7651o.md)