# Extension of Deadline for Promulgating Designations for the 2010 Primary Sulfur Dioxide National Ambient Air Quality Standard
> **Rule** · Extension of deadline for promulgating designations. · Published 2012-08-03 · 77 FR 46295
## Document
- **Document number:** 2012-19043
- **Category:** air-emissions
- **Federal Register citation:** 77 FR 46295
- **CFR reference:** 40 CFR 81
- **Publication date:** 2012-08-03
- **EPA docket:** EPA-HQ-OAR-2012-0233
## Abstract

The EPA is announcing that it is using its authority under the Clean Air Act (CAA) to extend by up to 1 year the deadline for promulgating initial area designations for the primary sulfur dioxide (SO<INF>2</INF>) national ambient air quality standard (NAAQS) that was promulgated in June 2010. With this extension, the EPA is now required to complete initial designations for this NAAQS by June 3, 2013.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2012/08/03/2012-19043/extension-of-deadline-for-promulgating-designations-for-the-2010-primary-sulfur-dioxide-national)
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