They are part of Halton EMS and can be found here on Radio Reference as part of the Bell Fleetnet Zone 1 system. They can usually be heard on sites 005 Hamilton (Charlton), 005 Ballinafad & 009 Mississauga (Britannia). Operational comms are on 35792 Mississauga Halton and hospital patches are usually on 35840 Mississauga Tactical 3.