# Approval and Promulgation of Air Quality Implementation Plans; Delaware; Ambient Air Quality Standard for Ozone and Fine Particulate Matter
> **Rule** · Direct final rule. · Published 2005-07-18 · Effective 2005-09-16 · 70 FR 41146
## Document
- **Document number:** 05-13987
- **Category:** air-emissions
- **Federal Register citation:** 70 FR 41146
- **CFR reference:** 40 CFR 52
- **Publication date:** 2005-07-18
- **Effective date:** 2005-09-16
- **State:** DE
- **EPA docket:** R03-OAR-2005-DE-0001
## Abstract

EPA is taking direct final action to approve revisions to the Delaware State Implementation Plan (SIP). The revision consists of modifications to the ambient air quality standards for ozone and fine particulate matter. EPA is approving this revision in accordance with the requirements of the Clean Air Act (CAA).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2005/07/18/05-13987/approval-and-promulgation-of-air-quality-implementation-plans-delaware-ambient-air-quality-standard)
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