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Medium urgency

Air Plan Partial Approval and Partial Conditional Approval; South Carolina; Control of Oxides of Nitrogen and Source Testing Requirements

Detected August 19, 2026 · in Environmental & Emissions Compliance (EPA)

EPA proposes partial approval and partial conditional approval of South Carolina's air plan for controlling oxides of nitrogen and source testing requirements.

Aforeworn detected this change in the Environmental & Emissions Compliance (EPA) space on August 19, 2026 and published this briefing so affected operators are forewarned rather than caught off guard. It is rated Medium urgency. Manufacturers, power generators, chemical processors, and other facilities in South Carolina subject to NOx emission limits and source testing. should confirm how it applies to their specific situation before acting. There is a time constraint attached: Comments are due by October 18, 2026 (assuming 60-day comment period from publication on August 19, 2026; verify exact date).. Acting after that point can mean penalties, a lapsed licence, or lost eligibility — exactly the kind of surprise Aforeworn exists to prevent. Aforeworn monitors Environmental & Emissions Compliance (EPA) continuously and turns every detected change into a plain-English briefing like this one, so you always know first. Forewarned is forearmed.

What changed

The EPA is proposing to partially approve and partially conditionally approve changes to South Carolina's State Implementation Plan (SIP) for controlling oxides of nitrogen and source testing requirements.

Who it affects

Manufacturers, power generators, chemical processors, and other facilities in South Carolina subject to NOx emission limits and source testing.

What you must do

Review the proposed rule to determine if your facility is affected; comment during the public comment period if needed.

Deadline

Comments are due by October 18, 2026 (assuming 60-day comment period from publication on August 19, 2026; verify exact date).

Source: https://www.federalregister.gov/documents/2026/08/19/2026-16932/air-plan-partial-approval-and-partial-conditional-approval-south-carolina-control-of-oxides-of

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