An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Pennsylvania SIP, Allegheny County Health Department ACHD Article XXI, Part A, Regulation 2101.20 General- Definitions 82 FR 24860


*             State:    Pennsylvania 

*             Agency:               PA-Allegheny County Health Department

*             Regulation Type:              Rule

*             Rule #:  Article XXI, Part A, Regulation 2101.20 General- Definitions 

*             Rule Title:           General- Definitions                      


*             State Effective Date:       06/19/2015

*             Final Federal Register Date:         05/31/2017

*             Federal Register Citation #:          82 FR 24860

               Superseded /

                Rescinded Date              


1.  Added definitions (Section II.), with a SIP effective date of 8/23/05

2.  Added definitions (Section III.) , with a State effective date of 5/24/10 and a SIP effective date of 2/28/11.

3.  2.  Addition of "PM2.5 standards." The State effective date is 5/24/10, and the SIP effedctive date is 2/3/14 (79 FR 54).

4.  added definitions for Outdoor Wood-fired boiler  12/8/14

5. Revision to add three new VOC compound CTG definitions 79 FR 70470 11-26-14 SIP effective 12/26/14

6. revised definitions for Major Source and Major modification  SIP effective 4-29-15...80 FR 16568 FR date 3-30-15

7.  Revised Definition of "County Executive" to mean "the Chief Executive of Alleghey County, Pennsylvania, as defined in the Allegheny County Home Rule Charter".  SIP effective 7/1/2017 82 FR 24860

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.