Data / Federal rules / 2026-06838

Air Plan Approval; Rhode Island; Regional Haze State Implementation Plan for the Second Implementation Period; Prong 4 (Visibility) for the 2015 8-Hour Ozone National Ambient Air Quality Standard

The Environmental Protection Agency published this final rule in the Federal Register on April 9, 2026. It took effect on May 11, 2026.

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What the agency says

The Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision submitted by the State of Rhode Island on March 7, 2025, as satisfying the applicable requirements under the Clean Air Act (CAA) and EPA's Regional Haze Rule (RHR) for the program's second implementation period. Rhode Island's SIP submission addresses the requirement that states must periodically revise their long-term strategies for making reasonable progress towards the national goal of preventing any future, and remedying any existing, anthropogenic impairment of visibility, including regional haze, in mandatory Class I Federal areas. The SIP submission also addresses other applicable requirements for the second implementation period of the regional haze program. EPA is also approving the remaining element of Rhode Island's September 23, 2020, infrastructure SIP (ISIP) submittal for the 2015 ozone National Ambient Air Quality Standard (NAAQS). The approval of Rhode Island's second implementation period regional haze plan addresses ISIP requirements related to visibility protection. The EPA is taking this action pursuant to sections 110 and 169A of the Clean Air Act.

Key facts

Document number: 2026-06838
Type: Final rule
Action: Final rule
Agency: Environmental Protection Agency
Published: April 9, 2026
Takes effect: May 11, 2026
Dates: This rule is effective on May 11, 2026.
Docket: EPA-R01-OAR-2025-0915 and EPA-R01-OAR-2020-0562; FRL-13065-02-R1
Code of Federal Regulations: 40 CFR 52
Topics: Air pollution control; Carbon monoxide; Environmental protection; Incorporation by reference; Intergovernmental relations; Lead; Nitrogen dioxide; Ozone; Particulate matter; Reporting and recordkeeping requirements; Sulfur oxides; Volatile organic compounds
Pages: 4

The document on federalregister.gov PDF

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Everything from the Environmental Protection Agency · Rules on air pollution control · Rules on carbon monoxide · Rules on environmental protection · Published in April 2026

Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.