40 CFR § 52.1471 - Classification of regions.
---
identifier: "/us/cfr/t40/s52.1471"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 52.1471 - Classification of regions."
title_number: 40
title_name: "Protection of Environment"
section_number: "52.1471"
section_name: "Classification of regions."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "C"
subchapter_name: "AIR PROGRAMS"
part_number: "52"
part_name: "APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS"
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"
cfr_part: "52"
---
# 52.1471 Classification of regions.
The Nevada plan is evaluated on the basis of the following classifications:
| | | | | | |
| --- | --- | --- | --- | --- | --- |
| Las Vegas Intrastate | I | III | III | I | I |
| Northwest Nevada Intrastate | I | III | III | III | III |
| Nevada Intrastate | IA | III | III | III | III |
[80 FR 67663, Nov. 3, 2015]