# Air Plan Approval; Delaware; Philadelphia Area Base Year Inventory for the 2015 Ozone National Ambient Air Quality Standards
> **Rule** · Final rule. · Published 2022-03-25 · Effective 2022-04-25 · 87 FR 17011
## Document
- **Document number:** 2022-06276
- **Category:** air-emissions
- **Federal Register citation:** 87 FR 17011
- **CFR reference:** 40 CFR 52
- **Publication date:** 2022-03-25
- **Effective date:** 2022-04-25
- **State:** DE
- **EPA docket:** EPA-R03-OAR-2021-0854
## Abstract

The Environmental Protection Agency (EPA) is approving a state implementation plan (SIP) revision formally submitted by the State of Delaware. This revision consists of the base year inventory for the Delaware portion of the Philadelphia-Wilmington-Atlantic City, PA-NJ- MD-DE marginal nonattainment area (Philadelphia Area) for the 2015 ozone national ambient air quality standards (NAAQS). This action is being taken under the Clean Air Act (CAA).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2022/03/25/2022-06276/air-plan-approval-delaware-philadelphia-area-base-year-inventory-for-the-2015-ozone-national-ambient)
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