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| Component Change History |
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| Apr 1950 |
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| - | | New SMA: Pittsburgh, PA SMA |
| - | | Allegheny County, PA included as original component of Pittsburgh, PA SMA |
| - | | Beaver County, PA included as original component of Pittsburgh, PA SMA |
| - | | Washington County, PA included as original component of Pittsburgh, PA SMA |
| - | | Westmoreland County, PA included as original component of Pittsburgh, PA SMA |
| - | | Pittsburgh, PA designated as original central city of new Pittsburgh, PA SMA |
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| Jun 1983 |
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| - | | McKeesport, PA designated as original central city of new Pittsburgh, PA PMSA in Pittsburgh-Beaver Valley, PA CMSA |
| - | | Fayette County, PA included as original component of Pittsburgh, PA PMSA in Pittsburgh-Beaver Valley, PA CMSA |
| - | | Pittsburgh, PA transferred from Pittsburgh, PA SMSA to Pittsburgh, PA PMSA in Pittsburgh-Beaver Valley, PA CMSA and was designated as original central city of new PMSA |
| - | | Title of Pittsburgh, PA SMSA changed to Pittsburgh-Beaver Valley, PA CMSA |
| - | | Allegheny County, PA included as original component of Pittsburgh, PA PMSA in Pittsburgh-Beaver Valley, PA CMSA, transferred from Pittsburgh, PA SMSA |
| - | | Beaver County, PA included as original component of Beaver County, PA PMSA in Pittsburgh-Beaver Valley, PA CMSA, transferred from Pittsburgh, PA SMSA |
| - | | Washington County, PA included as original component of Pittsburgh, PA PMSA in Pittsburgh-Beaver Valley, PA CMSA, transferred from Pittsburgh, PA SMSA |
| - | | Westmoreland County, PA included as original component of Pittsburgh, PA PMSA in Pittsburgh-Beaver Valley, PA CMSA, transferred from Pittsburgh, PA SMSA |
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| Dec 1992 |
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| - | | McKeesport, PA no longer designated as central city of Pittsburgh, PA PMSA in Pittsburgh-Beaver Valley, PA CMSA |
| - | | Title of Pittsburgh-Beaver Valley, PA CMSA changed to Pittsburgh, PA MSA |
| - | | Allegheny County, PA added to Pittsburgh, PA MSA, transferred from Pittsburgh, PA PMSA in Pittsburgh-Beaver Valley, PA CMSA |
| - | | Beaver County, PA added to Pittsburgh, PA MSA, transferred from Beaver County, PA PMSA in Pittsburgh-Beaver Valley, PA CMSA |
| - | | Butler County, PA added to Pittsburgh, PA MSA |
| - | | Fayette County, PA added to Pittsburgh, PA MSA, transferred from Pittsburgh, PA PMSA in Pittsburgh-Beaver Valley, PA CMSA |
| - | | Washington County, PA added to Pittsburgh, PA MSA, transferred from Pittsburgh, PA PMSA in Pittsburgh-Beaver Valley, PA CMSA |
| - | | Westmoreland County, PA added to Pittsburgh, PA MSA, transferred from Pittsburgh, PA PMSA in Pittsburgh-Beaver Valley, PA CMSA |
| - | | Pittsburgh, PA transferred from Pittsburgh, PA PMSA in Pittsburgh-Beaver Valley, PA CMSA to Pittsburgh, PA MSA and was designated as central city of MSA |
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| Jun 2003 |
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| - | | New CSA: Pittsburgh-New Castle, PA CSA |
| - | | Armstrong County, PA added to Pittsburgh, PA Metro Area in Pittsburgh-New Castle, PA CSA |
| - | | New Micro Area: New Castle, PA Micro Area in Pittsburgh-New Castle, PA CSA |
| - | | Lawrence County, PA included as original component of New Castle, PA Micro Area in Pittsburgh-New Castle, PA CSA |
| - | | New Castle, PA designated as original principal city of new New Castle, PA Micro Area in Pittsburgh-New Castle, PA CSA |
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