40 CFR § 52.738 - Significant deterioration of air quality.

---
identifier: "/us/cfr/t40/s52.738"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 52.738 - Significant deterioration of air quality."
title_number: 40
title_name: "Protection of Environment"
section_number: "52.738"
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"
---


# 52.738 Significant deterioration of air quality.

(a) The requirements of sections 160 through 165 of the Clean Air Act are met, except for sources seeking permits to locate in Indian reservations within the State of Illinois, and any other area where the EPA or an Indian tribe has demonstrated that a tribe has jurisdiction.

(b) The provisions of § 52.21 except paragraph (a)(1) are hereby incorporated and made a part of the applicable State plan for the State of Illinois for sources seeking permits to locate in Indian reservations or in any other area where the EPA or an Indian tribe has demonstrated that a tribe has jurisdiction.

(c) All applications and other information required pursuant to § 52.21 from sources located in the State of Illinois shall be submitted to the state agency, Illinois Environmental Protection Agency, 1021 North Grand Avenue East, Springfield, Illinois 62794.

[45 FR 52741, Aug. 7, 1980, as amended at 46 FR 9584, Jan. 29, 1981; 68 FR 11323, Mar. 10, 2003; 68 FR 74489, Dec. 24, 2003; 75 FR 55275, Sept. 10, 2010; 86 FR 50470, Sept. 9, 2021]