---
kind: "unit"
title: "42"
title_heading: "The Public Health and Welfare"
key: "ch85/schI/ptA"
level: "part"
label: "Part A"
heading: "Air Quality and Emission Limitations"
release: "119-102"
date: "2026-07-12"
url: "https://uscodex.org/usc/42/ch85-schI-ptA"
sections_count: 38
---

# Part A — Air Quality and Emission Limitations

Title 42 — The Public Health and Welfare › Chapter 85 — Air Pollution Prevention and Control › Subchapter I — Programs and Activities

## Sections

- [§7401. Congressional findings and declaration of purpose](/usc/42/7401.md)
- [§7402. Cooperative activities](/usc/42/7402.md)
- [§7403. Research, investigation, training, and other activities](/usc/42/7403.md)
- [§7404. Research relating to fuels and vehicles](/usc/42/7404.md)
- [§7405. Grants for support of air pollution planning and control programs](/usc/42/7405.md)
- [§7406. Interstate air quality agencies; program cost limitations](/usc/42/7406.md)
- [§7407. Air quality control regions](/usc/42/7407.md)
- [§7408. Air quality criteria and control techniques](/usc/42/7408.md)
- [§7409. National primary and secondary ambient air quality standards](/usc/42/7409.md)
- [§7410. State implementation plans for national primary and secondary ambient air quality standards](/usc/42/7410.md)
- [§7411. Standards of performance for new stationary sources](/usc/42/7411.md)
- [§7412. Hazardous air pollutants](/usc/42/7412.md)
- [§7413. Federal enforcement](/usc/42/7413.md)
- [§7414. Recordkeeping, inspections, monitoring, and entry](/usc/42/7414.md)
- [§7415. International air pollution](/usc/42/7415.md)
- [§7416. Retention of State authority](/usc/42/7416.md)
- [§7417. Advisory committees](/usc/42/7417.md)
- [§7418. Control of pollution from Federal facilities](/usc/42/7418.md)
- [§7419. Primary nonferrous smelter orders](/usc/42/7419.md)
- [§7420. Noncompliance penalty](/usc/42/7420.md)
- [§7421. Consultation](/usc/42/7421.md)
- [§7422. Listing of certain unregulated pollutants](/usc/42/7422.md)
- [§7423. Stack heights](/usc/42/7423.md)
- [§7424. Assurance of adequacy of State plans](/usc/42/7424.md)
- [§7425. Measures to prevent economic disruption or unemployment](/usc/42/7425.md)
- [§7426. Interstate pollution abatement](/usc/42/7426.md)
- [§7427. Public notification](/usc/42/7427.md)
- [§7428. State boards](/usc/42/7428.md)
- [§7429. Solid waste combustion](/usc/42/7429.md)
- [§7430. Emission factors](/usc/42/7430.md)
- [§7431. Land use authority](/usc/42/7431.md)
- [§7432. Clean heavy-duty vehicles](/usc/42/7432.md)
- [§7433. Grants to reduce air pollution at ports](/usc/42/7433.md)
- [§7434. Repealed.](/usc/42/7434.md)
- [§7435. Low emissions electricity program](/usc/42/7435.md)
- [§7436. Methane emissions and waste reduction incentive program for petroleum and natural gas systems](/usc/42/7436.md)
- [§7437. Greenhouse gas air pollution plans and implementation grants](/usc/42/7437.md)
- [§7438. Environmental and climate justice block grants](/usc/42/7438.md)