40 CFR § 81.427 - South Dakota.

---
identifier: "/us/cfr/t40/s81.427"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 81.427 - South Dakota."
title_number: 40
title_name: "Protection of Environment"
section_number: "81.427"
section_name: "South 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"
---


# 81.427 South Dakota.

| Area name | Acreage | Public Law establishing | Federal land manager |
| --- | --- | --- | --- |
| Badlands Wild | 64,250 | 94-567 | USDI-NPS |
| Wind Cave NP | 28,060 | 57-16 | USDI-NPS |