40 CFR § 81.423 - North Dakota.

---
identifier: "/us/cfr/t40/s81.423"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 81.423 - North Dakota."
title_number: 40
title_name: "Protection of Environment"
section_number: "81.423"
section_name: "North Dakota."
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"
---


# 81.423 North Dakota.

| Area name | Acreage | Public Law establishing | Federal land manager |
| --- | --- | --- | --- |
| Lostwood Wild | 5,557 | 93-632 | USDI-FWS. |
| Theodore Roosevelt, NP | 69,675 | 80-38 | USDI-NPS. |

[54 FR 41098, Oct. 5, 1989]