Where in particular? Northampton county is UHF "T" band, not that bad except for Easton PD, East PD, and Tac 3. Those frequencies can be troublesome to receive clearly at times. The closer the better. Bethlehem is Phase 1, good reception throughout most of the valley.
Lehigh county is VHF High. Good reception throughout most of the valley too. Allentown is EDACS for now. Reception can be spotty depending on where you are. They will be going Phase 2 soon, testing is under way.
PD is pretty much in the clear to listen except Allentown which is encrypted.
Depending on where you are there is Bucks county Phase 2 to listen to as well as Berks county Phase 2. There is Monroe county a mix of VHF and UHF.
Loads of DMR if you're into it, and some NXDN.