San Diego County Mutual Aid Genres:emergency Playing: Slow at times. RCS North & South zone & SDPD mutual aid talk groups (used for multi-jurisdictional pursuits/events/hailing/emergencies) and local/state inter-agency frequencies. Leave a Review Set your rating: Your Review: Submit You Also May Like Calhoun County Sheriff, Fire, and EMS emergencypolice Richmond Fire Dispatch emergency San Felipe Frydek Volunteer Fire emergency Edcouch Fire emergency Posts navigation San Diego City and Poway Fire San Diego International Airport – KSAN