40 CFR § 52.985 - Visibility protection.

---
identifier: "/us/cfr/t40/s52.985"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 52.985 - Visibility protection."
title_number: 40
title_name: "Protection of Environment"
section_number: "52.985"
section_name: "Visibility protection."
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"
---


# 52.985 Visibility protection.

(a) *Measures addressing best available retrofit technology (BART) for electric generating unit (EGU) emissions of nitrogen oxides (NO*<sub>X</sub>*)*. The BART requirements for EGU NO<sub>X</sub> emissions are satisfied by § 52.984.

(b) *Other measures addressing BART.* The BART requirements for emissions other than EGU NO<sub>X</sub> emissions are satisfied by the Louisiana Regional Haze SIP approved December 21, 2017.

[82 FR 60543, Dec. 21, 2017]