EPAAmends 40 CFR Part 52 - PART 52—APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS

Sep 2, 2026

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Dated November 25, 2019, the EPA amends 40 CFR part 52 and sets out approval and promulgation of implementation plans. The notice continues the authority citation and updates Subpart Q—Iowa by amending § 52.820. It adds a new paragraph (e)(52) identifying EPA-approved Iowa nonregulatory provisions, including infrastructure prong 4 requirements for specified fine particulate matter, nitrogen dioxide, sulfur dioxide, and ozone elements. The approval specifies applicable dates and references CAA elements approved for prong 4.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages2

Reading Time5 min

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PART 52—APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS

Subpart Q—Iowa

§ 52.820 Identification of plan

FAQs

What action does the EPA take regarding 40 CFR part 52?

The EPA amends 40 CFR part 52 and establishes approval and promulgation requirements for implementation plans.

What section and subpart are updated for Iowa?

Subpart Q—Iowa is updated, and § 52.820 is amended by adding paragraph (e)(52).

Which types of requirements are addressed under the added (e)(52) provisions?

The provisions approve infrastructure prong 4 requirements for specified 2006/2012 fine particulate matter, 2010 nitrogen dioxide, 2010 sulfur dioxide, 2008 and 2015 ozone NAAQS, and related CAA elements.

Sep 2, 2026

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