Public Safety (Security guards, along with armed Police Officers), Emergency and Supervisor talkgroups.
This includes the MetroLink, MetroBus, and contracted St Clair County Transit District (IL) buses.  
Transit serving St Louis City (MO), St Louis County (MO), St Clair County (IL)

This feed displays TALKGROUP (Channel) NAMES and RADIO IDs (unit transmitting), so you can tell what channel you are hearing and who is talking.  You will need to use a particular app, such as "Scanner Radio", available in your app phone store.   There may be other aps available, but many of them DO NOT display this information. 

Analog Conventional Frequencies
Currently NONE

MOSWIN Statewide Digital P25 Trunked System 
Sites: 2-001 St Louis City, 2-005 St Louis City/MSHP, 2-007 MetroTransit North, 2-008 MetroTransit South

Talkgroups: 
10401  Public Safety Dispatch
10404  Emergency 
10410  Transit Service Managers 
10411  Transit Service Managers
10412  Transit Service Managers 
(and possibly a couple others)

Call Sign Identifiers
700s - TSMs - Transit Security Managers (Supervisors for *bus/train)
800s - TSMs - Transit Security Managers (Supervisors for *bus/train)
900s - TSS - Transit Security Specialists (Drive Vehicles, have Taser, employed by Metro)
7600s - St Clair County Sheriff Deputies (working along the MetroLink line in the county)
9100s - Allied contracted Security (Northern units from Forest Park to Airport on the xxx line)
9200s - Allied contracted Security (Southern units from Forest Park to Shrewsbury on the xxx line)
9300s - Allied contracted Security (East/St Louis City units)
9400s - Allied contracted Security (Illinois units)
9500s - Allied contracted Security (working at Events, like Stadium station for Cardinal games, or Convention Center)

Antenna