# Approval and Promulgation of Air Quality Implementation Plans; Commonwealth of Pennsylvania; Determination of Clean Data for the 1997 Fine Particulate Matter Standard
> **Rule** · Final rule. · Published 2009-09-25 · Effective 2009-09-25 · 74 FR 48863
## Document
- **Document number:** E9-23057
- **Category:** air-emissions
- **Federal Register citation:** 74 FR 48863
- **CFR reference:** 40 CFR 52
- **Publication date:** 2009-09-25
- **Effective date:** 2009-09-25
- **State:** PA
- **EPA docket:** EPA-R03-OAR-2009-0506
## Abstract

EPA is determining that the Johnstown (Cambria and Indiana Counties), Lancaster (Lancaster County), Reading (Berks County), and York (York County), Pennsylvania nonattainment areas for the 1997 fine particulate matter (PM<INF>2.5</INF>) National Ambient Air Quality Standard (NAAQS) have clean data for the 1997 PM<INF>2.5</INF> NAAQS.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2009/09/25/E9-23057/approval-and-promulgation-of-air-quality-implementation-plans-commonwealth-of-pennsylvania)
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