Air Plan Approval; New York; Interstate Transport Requirements for the 2010 SO2 NAAQS

Published

Sep 9, 2026

Effective

Oct 9, 2026

Citation

91 FR 57260

Docket

EPA-R02-OAR-2025-1047, FRL-13227-02-R2

Final rule.

Summary

The Environmental Protection Agency (EPA) has officially approved New York’s State Implementation Plan (SIP) that shows the state meets the “good neighbor” requirements of the Clean Air Act for the 2010 one‑hour sulfur dioxide (SO₂) air‑quality standard. The rule confirms that New York’s emissions control measures are sufficient to prevent the state’s pollution from traveling across state lines in amounts that would cause another state to fail to meet, or maintain, the federal SO₂ standard. This approval helps ensure that all states can work together to keep the air clean and protects communities that might otherwise be affected by out‑of‑state pollution. The action is a final rule issued by the EPA, the federal agency responsible for enforcing the Clean Air Act. It directly affects New York, which must continue to follow the approved plan, and any neighboring states that could be impacted by SO₂ transported from New York. Because the rule is final, the public comment period that typically accompanies proposed regulations has already closed; there is no further comment deadline. The rule was published in the Federal Register on September 9, 2026 (91 FR 57260) and became effective on October 9, 2026. From that date forward, New York’s approved SIP is incorporated into the national air‑quality framework, and the EPA will monitor the state’s compliance with the interstate‑transport provisions. If future data show that the plan is insufficient, the agency could require additional measures, but for now the approved plan is legally enforceable.

AI-generated summary — verify against the Federal Register text.

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