I agree with kf7yn about the fire dispatches. All fire dispatching in SL County is done by VECC, except for Salt Lake City which does their own. Anytime a fire gets too big or too threatening, any fire dept can be called up, so for us listeners, it seems like one big fire dept.
The city of Murray, always one to be independent, chose not to join UCAN. The state gave them 5 freqs from an 800 MHz trunked system whose users were migrated to UCAN.
Murray uses 800 MHz conventional freqs, but they can access common trunked channels like the Landing Zones and Regional.
The SLCO Sheriff created the Unified Police Department (UPD) to patrol the unicorporated county.
There are also incorporated cities already mentioned that are patrolled by or have joined UPD.
We could organize the cities / towns by geographical area:
South County: Draper, Sandy, Bluffdale, Riverton, S Jordan, Herriman.
Mid County: Midvale, Murray, West Jordan, Taylorsville, Cottonwood, Millcreek.
North County: U of U, South Salt Lake, West Valley, SLC UCAN talk groups.
I would list Salt Lake City by itself since they have their own trunked system.