---
kind: "unit"
title: "40"
title_heading: "Protection of Environment"
key: "chI/subchC/part52/subpartXX"
level: "subpart"
label: "Subpart XX"
heading: "West Virginia"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/40/chI-subchC-part52-subpartXX"
sections_count: 17
---

# Subpart XX — West Virginia

Title 40 C.F.R. — Protection of Environment › Chapter I — Environmental Protection Agency › Subchapter C — Air Programs › Part 52 — Approval and Promulgation of Implementation Plans

## Sections

- [§52.2520. Identification of plan.](/cfr/40/52.2520.md)
- [§52.2521. Classification of regions.](/cfr/40/52.2521.md)
- [§52.2522. Identification of plan-conditional approval.](/cfr/40/52.2522.md)
- [§52.2523-52.2524. Reserved](/cfr/40/52.2523-52.2524.md)
- [§52.2525. Control strategy: Sulfur dioxide.](/cfr/40/52.2525.md)
- [§52.2526. Control strategy: Particulate matter.](/cfr/40/52.2526.md)
- [§52.2527. Determination of attainment.](/cfr/40/52.2527.md)
- [§52.2528. Significant deterioration of air quality.](/cfr/40/52.2528.md)
- [§52.2529-52.2530. Reserved](/cfr/40/52.2529-52.2530.md)
- [§52.2531. Base year emissions inventory.](/cfr/40/52.2531.md)
- [§52.2532. Motor vehicle emissions budgets.](/cfr/40/52.2532.md)
- [§52.2533. Visibility protection.](/cfr/40/52.2533.md)
- [§52.2534. Stack height review.](/cfr/40/52.2534.md)
- [§52.2540. Interstate pollutant transport provisions; What are the FIP requirements for decreases in emissions of nitrogen oxides?](/cfr/40/52.2540.md)
- [§52.2541. Interstate pollutant transport provisions; What are the FIP requirements for decreases in emissions of sulfur dioxide?](/cfr/40/52.2541.md)
- [§52.2560. Small business technical and environmental compliance assistance program.](/cfr/40/52.2560.md)
- [§52.2565. Original identification of plan section.](/cfr/40/52.2565.md)