40 CFR § 81.410 - Idaho.

---
identifier: "/us/cfr/t40/s81.410"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 81.410 - Idaho."
title_number: 40
title_name: "Protection of Environment"
section_number: "81.410"
section_name: "Idaho."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "C"
subchapter_name: "AIR PROGRAMS"
part_number: "81"
part_name: "DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7401,"
regulatory_source: "36 FR 22421, Nov. 25, 1971, unless otherwise noted."
cfr_part: "81"
---


# 81.410 Idaho.

| Area name | Acreage | Public Law establishing | Federal land manager |
| --- | --- | --- | --- |
| Craters of the Moon Wild | 43,243 | 91-504 | USDI-NPS |
| Hells Canyon Wild | 83,800 | 94-199 | USDA-FS |
| Sawtooth Wild | 216,383 | 92-400 | USDA-FS |
| Selway-Bitterroot Wild | 988,770 | 88-577 | USDA-FS |
| Yellowstone NP | 31,488 | () | USDI-NPS |
| Hells Canyon Wilderness, 192,700 acres overall, of which 108,900 acres are in Oregon and 83,800 acres are in Idaho. |  |  |  |
| Selway Bitterroot Wilderness, 1,240,700 acres overall, of which 988,700 acres are in Idaho and 251,930 acres are in Montana. |  |  |  |
| Yellowstone National Park, 2,219,737 acres overall, of which 2,020,625 acres are in Wyoming, 167,624 acres are in Montana, and 31,488 acres are in Idaho. |  |  |  |
| 17 Stat. 32 (42nd Cong.). |  |  |  |