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Final ruleTook effect March 18, 2026

National Emission Standards for Hazardous Air Pollutants: Polyether Polyols Production Industry Review

Built by the Tribune's code from the Federal Register. No AI wrote this page. Published in the Federal Register March 18, 2026. Document 2026-05261. Updated Nov. 13, 2026.

What it does

The U.S. Environmental Protection Agency (EPA) is finalizing amendments to the National Emission Standards for Hazardous Air Pollutants (NESHAP) for the Polyether Polyols (PEPO) Production source category ("PEPO NESHAP") under Clean Air Act (CAA) section 112. Specifically, the EPA is finalizing certain ethylene oxide (EtO)- specific standards pursuant to CAA section 112(d)(6) rather than finalizing the proposed second residual risk review and corresponding amendments pursuant to CAA section 112(f)(2). In addition, the EPA is taking final action addressing certain issues raised in an administrative petition for reconsideration. Lastly, the EPA is finalizing maximum achievable control technology (MACT) standards for certain emission points, work practice standards for certain activities where alternatives are appropriate, performance testing requirements once every five years for certain process vents, and electronic reporting requirements for performance test reports, flare management plans, and periodic reports.

The Environmental Protection Agency's summary, as published in the Federal Register.

What changed in the regulation

1 part of Title 40 of the Code of Federal Regulations:

40 CFR 63

Wording on eCFR: the day before it took effect and from the day it took effect (first part listed).

Compared with

The Environmental Protection Agency has published 245 final rules in 2026 so far, compared with 263 in all of 2025.

Counted by the Tribune from Federal Register records since Jan. 1, 2025.

Before this

No earlier Federal Register document under regulation identifier 2060-AW01 since Jan. 1, 2025.

What happens next and when

This final rule is effective on March 18, 2026. The Director of the Federal Register (FR) has approved incorporation by reference (IBR) of certain publications listed in the rule as of March 18, 2026.

The agency's dates, word for word.

Document number2026-05261
ActionFinal rule.
AgenciesEnvironmental Protection Agency
PublishedMarch 18, 2026
Effective dateMarch 18, 2026
Regulation identifier (RIN)2060-AW01
DocketEPA-HQ-OAR-2023-0282

Source: the Federal Register (public domain). The document in the Federal Register