Northumberland County (NUM)
Adams
Allegheny
Armstrong
Beaver
Bedford
Berks
Blair
Bradford
Butler
Bucks
Carbon
Cambria
Center
Chester
Clarion
Clearfield
Clinton
Columbia
Crawford
Cameron
Cumberland
Dauphin
Delaware
Elk
Erie
Fayette
Forest
Franklin
Fulton
Greene
Huntingdon
Indiana
Jefferson
Juniata
Lackawanna
Lancaster
Lawrence
Lebanon
Lehigh
Luzerne
Lycoming
McKean
Mercer
Montgomery
Mifflin
Monroe
Montour
Northampton
Northumberland
Perry
Philadelphia
Pike
Potter
Schuykill
Snyder
Somerset
Sullivan
Susquehana
Tioga
Union
Venango
Warren
Washington
Wayne
Westmoreland
Wyoming
York
| Year |
Total stations |
Mobiles | Portables | Rovers |
% of grand total |
County total |
| 1987 | 5 | 3 | 0 | 0 | 0.25% | 27,752 |
| 1988 | 6 | 4 | 0 | 0 | 0.09% | 9,195 |
| 1989 | 7 | 6 | 0 | 0 | 0.24% | 23,343 |
| 1990 | 10 | 6 | 0 | 0 | 0.52% | 67,312 |
| 1991 | 10 | 5 | 1 | 0 | 1.01% | 116,387 |
| 1992 | 6 | 5 | 0 | 0 | 0.26% | 28,042 |
| 1993 | 4 | 1 | 1 | 0 | 1.09% | 110,419 |
| 1994 | 7 | 4 | 0 | 0 | 0.22% | 29,987 |
| 1995 | 6 | 3 | 0 | 0 | 0.37% | 53,334 |
| 1996 | 8 | 5 | 0 | 1 | 0.15% | 21,212 |
| 1997 | 7 | 6 | 0 | 0 | 0.07% | 9,868 |
| 1998 | 4 | 4 | 0 | 0 | 0.12% | 20,421 |
| 1999 | 8 | 6 | 0 | 1 | 0.58% | 86,829 |
| 2000 | 8 | 6 | 0 | 1 | 0.47% | 68,540 |
| 2001 | 8 | 6 | 0 | 0 | 0.41% | 64,315 |
| 2002 | 7 | 4 | 1 | 0 | 0.46% | 81,681 |
| 2003 | 9 | 7 | 0 | 0 | 0.64% | 89,576 |
| 2004 | 8 | 7 | 1 | 0 | 1.54% | 177,654 |
| 2005 | 5 | 3 | 0 | 0 | 0.35% | 44,820 |
| 2006 | 3 | 2 | 0 | 0 | 0.16% | 17,036 |
| 2007 | 5 | 2 | 0 | 1 | 0.13% | 13,802 |