The TOPAZ Regional Wireless Cooperative, which is used by Mesa PD, Gilbert PD, and Apache Junction PD, as well as the Mesa Fire & Medical Regional Dispatch Center (which serves Mesa, Gilbert, Queen Creek, Superstition (Apache Junction and surrounding areas), and Rio Verde FD's) is simulcast (they have 2 standalone sites, but you won't hear much unencrypted comms on them, and only the FD dispatcher side 99% of the time). Mesa Fire & Medical also has analog conventional VHF channels for larger fires.
The Maricopa County Sheriff's Office patrols Queen Creek, Sun Lakes, the Salt River recreational area, the recreational lakes, and unincorporated areas. The current Maricopa County radio system is not simulcast, but the future one being built out right now will be.
The Pinal County Sheriff is fully encrypted on the new Pinal County radio system.
Rural/Metro FD, Inc is analog conventional VHF, and covers county islands in the East Valley, as well as Fountain Hills, and the San Tan Valley area of Pinal County East and South of Queen Creek.
DPS is analog conventional UHF on the I-10, US 60 and AZ 202 freeways.
ADOT is on the AZWINS system, which is not simulcast. (This includes the Enforcement and Compliance Division officers who deal with commercial vehicles, and the ALERT emergency traffic control response unit that shuts down the freeways for DPS when needed. Maricopa County DOT has a similar unit known as REACT on the Maricopa County radio system. They are not the CB radio REACT group.)
The Ft. McDowell Indian Community FD uses the TOPAZ RWC on a seperate channel than what Mesa uses. The PD is encrypted.
The Salt River Indian Community FD is on the Salt River radio system. They're Phase II, but not simulcast I don't think. The Salt River PD is encrypted.
The Gila River Indian Community FD is on the Gila River radio system. They're Phase I, but not simulcast. The PD is encrypted.
Most of the rest of the Valley is on the Phoenix Regional Wireless Cooperative, which is mostly simulcast. This includes Scottsdale, Paradise Valley, Tempe, and Chandler PD's, plus the Phoenix FD Regional Dispatch Center. (Scottsdale, Paradise Valley, Tempe, Guadalupe, Chandler, Sun Lakes FD's, plus Phoenix and most of the West Valley PD's and FD's.) The PFDRDC also has analog conventional VHF channels for fire and hazmat calls.
I think that covers it.
John
Peoria