---
kind: "section"
citation: "40 C.F.R. § 52.842"
title: "40"
number: "52.842"
heading: "Visibility protection."
url: "https://uscodex.org/cfr/40/52.842"
---

# §52.842. Visibility protection.

- (a) The requirements of section 169A of the Clean Air Act (CAA) are met because the Regional Haze plan submitted by Iowa on March 25, 2008, and supplemented on May 14, 2019, includes fully approvable measures for meeting the requirements of the Regional Haze Rule including 40 CFR [51.308(d)(3)](/cfr/40/51.308.md?p=d-3) and [(e)](/cfr/40/51.308.md?p=d-e) with respect to emissions of NOX and SO2 from electric generating units.
- (b) The requirements of [section 169A](/cfr/40/169A.md) of the CAA are met because the Regional Haze plan submitted by Iowa on August 15, 2023, includes fully approvable measures for meeting the requirements of the Regional Haze Rule in [40 CFR 51.308](/cfr/40/51.308.md).

## Notes

### Amendments

[90 FR 37403, Aug. 5, 2025]

### Authority

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

### Amendments

[40 FR 5521, Feb. 6, 1975]

### Amendments

[90 FR 37403, Aug. 5, 2025]