---
kind: "section"
citation: "40 C.F.R. § 52.147"
title: "40"
number: "52.147"
heading: "Interstate transport."
url: "https://uscodex.org/cfr/40/52.147"
---

# §52.147. Interstate transport.

- (a) **Approval.** The SIP submitted on May 24, 2007 meets the requirements of Clean Air Act [section 110(a)(2)(D)(i)(I)](/cfr/40/110.md?p=a-2-D-i-I) (contribute significantly to nonattainment or interfere with maintenance of the NAAQS in any other state) and [section 110(a)(2)(D)(i)(II)](/cfr/40/110.md?p=a-2-D-i-II) (interfere with measures in any other state to prevent significant deterioration of air quality, only) for the 1997 8-hour ozone and 1997 PM2.5 NAAQS.
- (b) **Disapproval.** The SIPs submitted on May 24, 2007, February 28, 2011, and May 3, 2013 do not meet the requirements of Clean Air Act [section 110(a)(2)(D)(i)(II)](/cfr/40/110.md?p=a-2-D-i-II) (interfere with measures in any other state to protect visibility, only) for the 1997 8-hour ozone and 1997 PM2.5 NAAQS.
- (c) **Approval.** The SIP submitted on October 14, 2009 meets the requirements of Clean Air Act [section 110(a)(2)(D)(i)(I)](/cfr/40/110.md?p=a-2-D-i-I) (contribute significantly to nonattainment or interfere with maintenance of the NAAQS in any other state) for the 2006 PM2.5 NAAQS.
- (d) **Disapproval.** The SIPs submitted on October 14, 2009 and August 24, 2012 do not meet the requirements of Clean Air Act [section 110(a)(2)(D)(i)(II)](/cfr/40/110.md?p=a-2-D-i-II) (interfere with measures in any other state to prevent significant deterioration of air quality, only) for the 2006 PM2.5 NAAQS.
- (e) **Disapproval.** The SIPs submitted on October 14, 2009, February 28, 2011, and May 3, 2013 do not meet the requirements of Clean Air Act [section 110(a)(2)(D)(i)(II)](/cfr/40/110.md?p=a-2-D-i-II) (interfere with measures in any other state to protect visibility, only) for the 2006 PM2.5 NAAQS.
- (f) **Disapproval.** The SIPs submitted on December 11, 2015 and September 24, 2018 do not meet the requirements of Clean Air Act [section 110(a)(2)(D)(i)(II)](/cfr/40/110.md?p=a-2-D-i-II) (interfere with measures in any other state to protect visibility, only) for the 2012 PM2.5 NAAQS and the 2015 ozone NAAQS, respectively.

## Notes

### Amendments

[78 FR 46175, July 30, 2013, as amended at 89 FR 102773, Dec. 18, 2024]

### Authority

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

### Amendments

[40 FR 5521, Feb. 6, 1975]

### Amendments

[78 FR 46175, July 30, 2013, as amended at 89 FR 102773, Dec. 18, 2024]