Tri-County Area Radio Frequencies

The following thread is a comprehensive guide to all frequencies and trunking id's for the tri-county area radio systems. This is done to keep all frequencies in an orderly area and easier to access. There are a few terms you should know before attempting to program your scanner.

Conventional Frequencies - These are standard frequencies that don't require any trunking capable scanners. These usually include simulcasts of main fire channels.
Alpha Tag - An alpha tag indicates what may be displayed on the user's display.
Mode - The mode on which a conventional frequency is transmitted.

These lists will be updated accordingly. If any changes are made to the following frequencies, they will be updated ASAP.

Calvert County Fire Frequencies

33.820 - Fire Dispatch (Simulcast) - FM
154.28 - FMARS (Fire Mutual Aide Radio System) - FM
154.295 - FMARS - FM

Calvert County Police Frequencies

39.280 - State Police - FM

The following are trunked frequencies. You need a trunking scanner capable of tracking Motorola Type II Smartnet Systems

866.91250 - Trunking Channel
867.13750 - Trunking Channel
867.18750 - Trunking Control Channel
867.25000 - Trunking Control Channel
868.35000 - Trunking Control Channel

The following are talkgroups for Calvert County Fire to be used in conjunction with the trunked frequencies

1840 - Fire Main
1872 - Fire Tac 1
1904 - Fire Tac 2
1936 - Fire Tac 3
1968 - Fire Mutual Aide Channel 1 (Mainly used for St. Mary's)
2032 - Fire Training Channel
2704 - Benedict Channel 1 (Used by Charles County Units)

The following are talkgroups for Calvert County Police to be used in conjunction with the trunked frequencies

1616 - Police Main
1648 - Police Tac 1
1680 - Police Tac 2
1712 - Police Tac 3
1744 - Police Training
2064 - Jail

Charles County Fire Frequencies

158.775 - Fire Dispatch (Old, Simulcast) - FM
155.085 - Fire Dispatch (Simulcast of Fire Main) - FM
155.535 - Fire Tac 1 (Simulcast) - FM
158.865 - Fireground - FM
158.9550 - Fireground - FM
154.28 - FMARS - FM


Charles County Police Frequencies

155.61 - Sheriff La Plata (backup) - FM
155.64 - Sheriff Alternate/Tactical (backup) - FM
155.67 - Sheriff (backup) - FM
155.535 - Sheriff Waldorf Talkaround (backup) - FM
155.97 - Sheriff (backup) - FM
155.91 - Sheriff (backup) - FM

The following are trunked frequencies. You need a trunking scanner capable of tracking Motorola Type II Smartnet Systems

866.07500 - Trunking Channel
866.32500 - Trunking Channel
866.56250 - Trunking Channel
867.06250 - Trunking Channel
868.26250 - Trunking Alternate Control Channel
868.37500 - Trunking Control Channel
868.65000 - Trunking Alternate Control Channel
868.90000 - Trunking Alternate Control Channel

The following are talkgroups for Charles County Fire to be used in conjunction with the trunked frequencies

848 - Mutual Aide Channel
880 - Mutual Aide Channel
17040 - Fire Main
17056 - Fire Tac 1
17072 - Fire Tac 2
17088 - Fire Tac 3
17104 - Fire Tac 4
17120 - Fire Tac 5
17136 - Fire Training
17152 - MAR 1
17168 - MAR 2
17184 - MAR 3
17200 - MAR 4
17216 - EMS Secure Channel (Encrypted, no access to public radio)
17232 - Tac 6 (Patch to St. Mary's Fire)

The following are talkgroups for Charles County Police to be used in conjunction with the trunked frequencies

16464 - Sheriff's Office La Plata
16480 - Sheriff's Office Indian Head
16496 - Sheriff's Office Waldorf
16512 - Sheriff's Office Waldorf West (Future Use)
16528 - Sheriff's Office Tac 1
16544 - Sheriff's Office Tac 2
16560 - Sheriff's Office Tac 3
16576 - Sheriff's Office Tac 4
16592 - Sheriff's Office Operations Channel
16624 - Sheriff's Office Secure Channel (Encrypted, no access to public radio)
16640 - Sheriff's Office Encrypted Channel (Encrypted, no access to public radio)
16688 - Sheriff's Office Court Security
16704 - Animal Control
16736 - Sheriff's Office Encrypted (Encrypted, no access to public radio)
16784 - Jail

St. Mary's County Fire Frequencies

154.98 - Fire Dispatch (Simulcast of Fire Main) - FM
154.28 - FMARS - FM

The following are trunked frequencies. You need a trunking scanner capable of tracking EDACS (Standard) Systems

866.16250 - Trunking Channel
866.43750 - Trunking Channel
866.76250 - Trunking Channel
867.47500 - Trunking Channel
867.63750 - Trunking Channel
867.77500 - Trunking Channel
867.93750 - Trunking Channel
868.15000 - Trunking Channel
868.72500 - Trunking Channel
868.78750 - Trunking Channel

The following are talkgroups for St. Mary's County Fire to be used in conjunction with the trunked frequencies

785 - Fire Dispatch (Primary)
786 - Fire Dispatch 2 (Used for EMS)
787 - Meet 1
788 - Meet 2
801 - Tac 1
802 - Ops 1A
803 - Ops 1B
804 - Ops 1C
817 - Tac 2
818 - Ops 2A
819 - Ops 2B
820 - Ops 2C
833 - Tac 3
834 - Ops 3A
835 - Ops 3B
836 - Ops 3C
849 - Tac 4
850 - Ops 4A
851 - Ops 4B
852 - Ops 4C
865 - SMH 1 (Backup to EMRC radio)
866 - SMH 2
867 - SMH 3
868 - Syscom 1
869 - Syscom 2
870 - Syscom 3
881 - Hazmat Ops (Encrypted, no access to public radio)

The following are talkgroups for St. Mary's County Police to be used in conjunction with the trunked frequencies

273 - Sheriff's Dispatch North
274 - Sheriff's Dispatch South
275 - Sheriff's Dispatch Main
276 - Sheriff's Supervisor
277 - Courthouse
278 - Police Channel (Used for high priority crimes, allows interops between Sheriff and State Police)
279 - CID
280 - SOD
289 - Sheriff Tac 1
290 - Sheriff Tac 2
291 - Sheriff Tac 3
292 - Sheriff Tac 4
293 - Sheriff Tac 5
294 - Sheriff Tac 6
305 - County Detention Center (CDC)
1041 - State Police Dispatch
1042 - State Police Tac 1
1043 - State Police Tac 2
1044 - State Police Tac 3

Thank's for the info- I think I'm going to take my scanner to Radio Shack to add St Mary's, they did Chuck County for me when I lived there. Programming not like the old days.

St. Mary's is REALLY easy to program, ASLONG as you know how EDACS works. EDACS uses LCN, which means you can't use the 0 channel to put in your first trunking freq. You put your trunking freq's in order, then enter trunk mode, put the talkgroup id's in order, and voila.