I thought I saw a list on the regional council meeting PDF somewhere where it listed the agencies that will be on the region's P25 system and EMS was included on that list.
Update: found the PDF from the region agenda from Friday, June 14, 2019.
Page 54 of this document -
https://calendar.regionofwaterloo.c...ommittee/4db435c3-9a09-4010-9ee1-aa6c0108581d
Waterloo Regional Voice Radio User Groups The main member agencies using the Voice Radio System are (in alphabetical order):
• Cambridge By-Law;
• Cambridge Fire Department;
• Cambridge Public Works;
• Grand River Transit;
• ION (Region of Waterloo Light Rail Transit);
• Kitchener By-Law;
• Kitchener Fire Department;
• North Dumfries Township Fire Department;
• Waterloo By-Law;
• Waterloo Fire Rescue;
• Waterloo Public Works;
• Waterloo Regional Airport;
• Waterloo Regional Paramedic Services; - This is what I was saying here that EMS would probably be on P25 with the rest of the regions emergency services.
• Waterloo Regional Police Service (WRPS);
• Waterloo Region Emergency Measures Office;
• Waterloo Region Security Services (including security dispatch);
• Waterloo Region Transportation;
• Waterloo Region Waste Management;
• Wellesley Township Fire Department;
• Wilmot Township Fire Department;
• Wilmot Township Public Works; and
• Woolwich Township Fire Department.
Other agencies and subgroups also use the legacy Voice Radio System, albeit with a lesser number of units.