# Approval and Promulgation of Air Quality Implementation Plans; District of Columbia; Interstate Pollution Transport Requirements for the 2006 24-Hour Fine Particulate Matter Standard
> **Rule** · Direct final rule. · Published 2015-08-21 · Effective 2015-10-20 · 80 FR 50785
## Document
- **Document number:** 2015-20527
- **Category:** air-emissions
- **Federal Register citation:** 80 FR 50785
- **CFR reference:** 40 CFR 52
- **Publication date:** 2015-08-21
- **Effective date:** 2015-10-20
- **State:** DC
- **EPA docket:** EPA-R03-OAR-2015-0537
## Abstract

The Environmental Protection Agency (EPA) is taking direct final action to approve a revision to the District of Columbia State Implementation Plan (SIP). The revision addresses the infrastructure requirements for interstate transport pollution with respect to the 2006 24-hour fine particulate matter (PM<INF>2.5</INF>) National Ambient Air Quality Standards (NAAQS). 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/2015/08/21/2015-20527/approval-and-promulgation-of-air-quality-implementation-plans-district-of-columbia-interstate)
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