On September 12, 2012, Marathon County Wisconsin made the cutover from a wideband analog radio system to a narrow band digital radio system. The County fire, Wausau Fire, and paging systems are still on analog narrowband, but the police and sheriff channels are now exclusively transmitting in P25 digital mode. Most scanners won’t be able to pick up these transmissions unless it is P25 digital compatible.
Still, there is lots of stuff you can monitor over the air, including the fire channels, DPW, and the highway department.
Please note a few frequency changes for Wausau and County Fire:
Wausau Fire Repeater: 154.235 MHz, PL167.9 NFM
Marathon County Fire: 154.965, PL186.2 NFM
More local frequencies can be found on the Radio Reference site.