Southington Changes?
"no hits on any of their frequencies"
I'm not aware of any changes, and I don't believe that the town would change all the freqs. used for the FD, PD, etc. at once.
I would think that it's more likely that you have inadvertently changed a PL setting, or your receiver, or antenna/coax is at fault.
Are you still receiving other towns/agencies, or the NWS freqs?