40 CFR § 52.2121 - Classification of regions.

---
identifier: "/us/cfr/t40/s52.2121"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 52.2121 - Classification of regions."
title_number: 40
title_name: "Protection of Environment"
section_number: "52.2121"
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"
---


# 52.2121 Classification of regions.

The South Carolina plan was evaluated on the basis of the following classifications:

|  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- |
| Augusta (Georgia)-Aiken (South Carolina) Interstate | I | I | III | III | III |
| Metropolitan Charlotte Interstate | I | II | III | III | I |
| Camden-Sumter Intrastate | II | III | III | III | III |
| Charleston Intrastate | I | I | III | III | III |
| Columbia Intrastate | II | III | III | III | III |
| Florence Intrastate | III | III | III | III | III |
| Georgetown Intrastate | II | III | III | III | III |
| Greenville-Spartanburg Intrastate | I | III | III | III | III |
| Greenwood Intrastate | III | III | III | III | III |
| Savannah (Georgia)-Beaufort (South Carolina) Interstate | I | I | III | III | III |