---
kind: "unit"
title: "40"
title_heading: "Protection of Environment"
key: "chI/subchB/part49"
level: "part"
label: "Part 49"
heading: "Indian Country: Air Quality Planning and Management"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/40/chI-subchB-part49"
sections_count: 537
---

# Part 49 — Indian Country: Air Quality Planning and Management

Title 40 C.F.R. — Protection of Environment › Chapter I — Environmental Protection Agency › Subchapter B — Grants and Other Federal Assistance

## Contents

- [Subpart A — Tribal Authority](/cfr/40/chI-subchB-part49-subpartA.md)
- [Subpart B — General Provisions](/cfr/40/chI-subchB-part49-subpartB.md)
- [Subpart C — General Federal Implementation Plan Provisions](/cfr/40/chI-subchB-part49-subpartC.md)
- [Subpart D — Implementation Plans for Tribes—Region I](/cfr/40/chI-subchB-part49-subpartD.md)
- [Subpart E — Implementation Plans for Tribes—Region II](/cfr/40/chI-subchB-part49-subpartE.md)
- [Subpart F — Implementation Plans for Tribes—Region III](/cfr/40/chI-subchB-part49-subpartF.md)
- [Subpart G — Implementation Plans for Tribes—Region IV](/cfr/40/chI-subchB-part49-subpartG.md)
- [Subpart H — Implementation Plans for Tribes—Region V](/cfr/40/chI-subchB-part49-subpartH.md)
- [Subpart I — Implementation Plans for Tribes—Region VI](/cfr/40/chI-subchB-part49-subpartI.md)
- [Subpart J — Implementation Plans for Tribes—Region VII](/cfr/40/chI-subchB-part49-subpartJ.md)
- [Subpart K — Implementation Plans for Tribes—Region VIII](/cfr/40/chI-subchB-part49-subpartK.md)
- [Subpart L — Implementation Plans for Tribes—Region IX](/cfr/40/chI-subchB-part49-subpartL.md)
- [Subpart M — Implementation Plans for Tribes—Region X](/cfr/40/chI-subchB-part49-subpartM.md)