40 CFR § 52.2451 - Significant deterioration of air quality.
---
identifier: "/us/cfr/t40/s52.2451"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 52.2451 - Significant deterioration of air quality."
title_number: 40
title_name: "Protection of Environment"
section_number: "52.2451"
section_name: "Significant deterioration of air quality."
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: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7401"
cfr_part: "52"
---
# 52.2451 Significant deterioration of air quality.
(a) The requirements of sections 160 through 165 of the Clean Air Act are met since the plan includes approvable procedures for the Prevention of Significant Air Quality Deterioration.
(b) Regulations for preventing significant deterioration of air quality. The provisions of § 52.21 (b) through (w) are hereby removed from the applicable state plan for the Commonwealth of Virginia.
[63 FR 13798, Mar. 23, 1998]