40 CFR § 74.25 - Current promulgated SO emissions limit.

---
identifier: "/us/cfr/t40/s74.25"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 74.25 - Current promulgated SO emissions limit."
title_number: 40
title_name: "Protection of Environment"
section_number: "74.25"
section_name: "Current promulgated SO emissions limit."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "C"
subchapter_name: "AIR PROGRAMS"
part_number: "74"
part_name: "SULFUR DIOXIDE OPT-INS"
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. 7601 and 7651"
regulatory_source: "60 FR 17115, Apr. 4, 1995, unless otherwise noted."
cfr_part: "74"
---


# 74.25 Current promulgated SO emissions limit.

The designated representative shall submit the following data:

(a) Current promulgated SO<sub>2</sub> emissions limit of the combustion source, expressed in lbs/mmBtu, which shall be the most stringent federally enforceable emissions limit that has been promulgated as of the date of submission of the opt-in permit application and that either is in effect on that date or will take effect after that date. If the promulgated SO<sub>2</sub> emissions limit is not expressed in lbs/mmBtu, the limit shall be converted to lbs/mmBtu by multiplying the limit by the appropriate factor as specified in Table 1 of § 74.23(a)(1)(i).

(b) Citations of statute, regulation and any other authority under which the emissions limit under paragraph (a) of this section is established as applicable to the combustion source;

(c) Averaging time associated with the emissions limit under paragraph (a) of this section.

(d) Effective date of the emissions limit under paragraph (a) of this section.