# Air Plan Approval; Delaware; 2022 Amendments to Delaware's Ambient Air Quality Standards
> **Rule** · Final rule. · Published 2024-12-23 · Effective 2025-01-22 · 89 FR 104431
## Document
- **Document number:** 2024-30404
- **Category:** air-emissions
- **Federal Register citation:** 89 FR 104431
- **CFR reference:** 40 CFR 52
- **Publication date:** 2024-12-23
- **Effective date:** 2025-01-22
- **State:** DE
- **EPA docket:** EPA-R03-OAR-2023-0444
## Abstract

The Environmental Protection Agency (EPA) is approving a state implementation plan (SIP) revision submitted by the State of Delaware. This SIP revision consists of Delaware's amendments to its ambient air quality standards for ground level ozone, amendments to citations to the Code of Federal Regulation (CFR) dates for the EPA sampling and analytical procedures and techniques for all ambient air quality standards in Delaware's regulations, and Delaware's amendment removing the sulfur dioxide (SO<INF>2</INF>) 24-hour and annual primary standards that have been revoked by EPA. This action is being taken under the Clean Air Act (CAA).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2024/12/23/2024-30404/air-plan-approval-delaware-2022-amendments-to-delawares-ambient-air-quality-standards)
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