---
kind: "section"
citation: "40 C.F.R. § 52.2581"
title: "40"
number: "52.2581"
heading: "Significant deterioration of air quality."
url: "https://uscodex.org/cfr/40/52.2581"
---

# §52.2581. Significant deterioration of air quality.

- (a) -(c) [Reserved]
- (d) The requirements of sections 160 through 165 of the Clean Air Act are met, except for sources seeking permits to locate in Indian country within the State of Wisconsin.
- (e) **Regulations for the prevention of the significant deterioration of air quality.** The provisions of [§ 52.21](/cfr/40/52.21.md) except paragraph (a)(1) are hereby incorporated and made a part of the applicable State plan for the State of Wisconsin for sources wishing to locate in Indian country; and sources constructed under permits issued by EPA.
- (f) **Forest County Potawatomi Community Reservation.**
  - (1) The provisions for prevention of significant deterioration of air quality at [40 CFR 52.21](/cfr/40/52.21.md) are applicable to the Forest County Potawatomi Community Reservation, pursuant to [§ 52.21(a)](/cfr/40/52.21.md?p=a).
  - (2) In accordance with section 164 of the Clean Air Act and the provisions of [40 CFR 52.21(g)](/cfr/40/52.21.md?p=g), those parcels of the Forest County Potawatomi Community's land 80 acres and over in size which are located in Forest County are designated as a Class I area for the purposes of prevention of significant deterioration of air quality. For clarity, the individual parcels are described below, all consisting of a description from the Fourth Principal Meridian, with a baseline that is the Illinois-Wisconsin border:
    - (i) **Section 14 of Township 36 north (T36N), range 13 east (R13E).**
    - (ii) **Section 26 of T36N R13E.**
    - (iii) **The west half (W 1/2) of the east half (E 1/2) of Section 27 of T36N R13E.**
    - (iv) **E 1/2 of SW 1/4 of Section 27 of T36N R13E.**
    - (v) **N 1/2 of N 1/2 of Section 34 of T36N R13E.**
    - (vi) **S 1/2 of NW 1/4 of Section 35 of T36N R13E.**
    - (vii) **Section 36 of T36N R13E.**
    - (viii) **Section 2 of T35N R13E.**
    - (ix) **W 1/2 of Section 2 of T34N R15E.**
    - (x) **Section 10 of T34N R15E.**
    - (xi) **S 1/2 of NW 1/4 of Section 16 of T34N R15E.**
    - (xii) **N 1/2 of SE 1/4 of Section 20 of T34N R15E.**
    - (xiii) **NW 1/4 of Section 28 of T34N R15E.**
    - (xiv) **W 1/2 of NE 1/4 of Section 28 of T34N R15E.**
    - (xv) **W 1/2 of SW 1/4 of Section 28 of T34N R15E.**
    - (xvi) **W 1/2 of NE 1/4 of Section 30 of T34N R15E.**
    - (xvii) **SW 1/4 of Section 2 of T34N R16E.**
    - (xviii) **W 1/2 of NE 1/4 of Section 12 of T34N R16E.**
    - (xix) **SE 1/4 of Section 12 of T34N R16E.**
    - (xx) **E 1/2 of SW 1/4 of Section 12 of T34N R16E.**
- (xxi) **N 1/2 of Section 14 of T34N R16E.**
- (xxii) **SE 1/4 of Section 14 of T34N R16E.**
- (xxiii) **E 1/2 of Section 16 of T34N R16E.**
- (xxiv) **NE 1/4 of Section 20 of T34N R16E.**
- (xxv) **NE 1/4 of Section 24 of T34N R16E.**
- (xxvi) **N 1/2 of Section 22 of T35N R15E.**
- (xxvii) **SE 1/4 of Section 22 of T35N R15E.**
- (xxviii) **N 1/2 of SW 1/4 of Section 24 of T35N R15E.**
- (xxix) **NW 1/4 of Section 26 of T35N R15E.**
- (xxx) **E 1/2 of Section 28 of T35N R15E.**
- (xxxi) **E 1/2 of NW 1/4 of Section 28 of T35N R15E.**
- (xxxii) **SW 1/4 of Section 32 of T35N R15E.**
- (xxxiii) **E 1/2 of NW 1/4 of Section 32 of T35N R15E.**
- (xxxiv) **W 1/2 of NE 1/4 of Section 32 of T35N R15E.**
- (xxxv) **NW 1/4 of Section 34 of T35N R15E.**
- (xxxvi) **N 1/2 of SW 1/4 of Section 34 of T35N R15E.**
- (xxxvii) **W 1/2 of NE 1/4 of Section 34 of T35N R15E.**
- (xxxviii) **E 1/2 of Section 36 of T35N R15E.**
- (xxix) **SW 1/4 of Section 36 of T35N R15E.**
- (xl) **S 1/2 of NW 1/4 of Section 36 of T35N R15E.**
- (xli) **S 1/2 of Section 24 of T35N R16E.**
- (xlii) **N 1/2 of Section 26 of T35N R16E.**
- (xliii) **SW 1/4 of Section 26 of T35N R16E.**
- (xliv) **W 1/2 of SE 1/4 of Section 26 of T35N R16E.**
- (xlv) **E 1/2 of SW 1/4 of Section 30 of T35N R16E.**
- (xlvi) **W 1/2 of SE 1/4 of Section 30 of T35N R16E.**
- (xlvii) **N 1/2 of Section 34 of T35N R16E.**

## Notes

### Amendments

[45 FR 52741, Aug. 7, 1980, as amended at 46 FR 9585, Jan. 29, 1981; 64 FR 28748, May 27, 1999; 68 FR 11324, Mar. 10, 2003; 68 FR 74490, Dec. 24, 2003; 72 FR 18394, Apr. 12, 2007; 73 FR 23101, May 29, 2008]

### Authority

Authority: 42 U.S.C. 7401 et seq.

### Amendments

[40 FR 5521, Feb. 6, 1975]

### Amendments

[45 FR 52741, Aug. 7, 1980, as amended at 46 FR 9585, Jan. 29, 1981; 64 FR 28748, May 27, 1999; 68 FR 11324, Mar. 10, 2003; 68 FR 74490, Dec. 24, 2003; 72 FR 18394, Apr. 12, 2007; 73 FR 23101, May 29, 2008]