Hereford Fire Department Tac1 154.8825 MHz. This is the primary dispatch and operations channel for the Hereford Fire Department. Hereford Police Department 155.8725 MHz. This is the main frequency that the Hereford Police department uses for operations. Deaf Smith Sheriff Office 155.295 MHz. This is the frequency that the Sheriff Department uses for their primary operations. All three of these channels are Analog VHF narrowband.