# Air Plan Approval; South Carolina; Updates to Ambient Air Quality Standards
> **Rule** · Final rule. · Published 2021-09-30 · Effective 2021-11-01 · 86 FR 54104
## Document
- **Document number:** 2021-21047
- **Category:** air-emissions
- **Federal Register citation:** 86 FR 54104
- **CFR reference:** 40 CFR 52
- **Publication date:** 2021-09-30
- **Effective date:** 2021-11-01
- **State:** SC
- **EPA docket:** EPA-R04-OAR-2020-0676
## Abstract

The Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision submitted by the State of South Carolina, through the South Carolina Department of Health and Environmental Control (SC DHEC), on April 24, 2020. The SIP revision approves a non-substantive formatting change and the removal of an outdated sentence regarding test methods for gaseous fluorides from South Carolina's ambient air quality standards regulation. EPA is finalizing approval of these changes pursuant to the Clean Air Act (CAA or Act) and implementing federal regulations.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/09/30/2021-21047/air-plan-approval-south-carolina-updates-to-ambient-air-quality-standards)
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