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****    Be sure to also view the Missouri Independent City of St. Louis page.  ****
See the WIKI for more information (Websites, Unit IDs, Pager Tones-Outs, Unidentified and former Frequencies, etc.)
Please see the WIKI for information on Law, Fire and EMS coverage for each municipality. 
Unless otherwise stated, all municipal services have migrated to the SLATER P25 digital trunked system.
 
851.0125
809.0125
RM
156.7 PL
8CALL90
800 MHz Calling Channel
FMN
Interop
851.5125
806.5125
RM
156.7 PL
8TAC91
800 MHz Tac Channel
FMN
Interop
Mississippi River - Commercial river traffic uses Marine Ch 13, recreational uses Ch 9 and Ch 16 is a hailing channel. 
For more see Maritime Database and American Boating Association.   US Army Corp of Engineers control the locks and dams

Frequencies

Government

St. Louis County Police Department
Provides contract patrol to: Black Jack, Clarkson Valley, Country Life Acres, Fenton, Grantwood Village, Green Park, Hanley Hills, Jennings, Marlborough, Norwood Court, Pasadena Hills, St. George, Twin Oaks, Valley Park, Vinita Terrace, Wilbur Park, Wildwood and Winchester.
155.37 CSQ Point-to-Point, used with other area dispatch centers "WQVG550"
See the WIKI for additional and legacy information
St. Louis Area Trunked Emergency Radio (SLATER)
Project 25 Phase I
Police used for nearly all Dispatch/Operations (as of June 2015). Nearly all Law Enforcement is encrypted.
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
155.475WQVG550 BM 79.7 PL MOLEEN 79.7 Nationwide Law Enforcement Emergency [Ch 10] FMN Law Dispatch
Office of Emergency Management
ECC - Warning Siren Data (POCSAG) = Outdoor Warning Sirens (Data)
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
854.0625WQJY940 RM CSQ StLCo Sirens N1 Siren Data - North (Chesterfield) (was D351) FMN Emergency Ops
854.0625WQJY940 RM CSQ StLCo Sirens N2 Siren Data - North (Chesterfield) (was D411) FMN Emergency Ops
854.1875WQJY940 RM CSQ StLCo Sirens C2 Siren Data - Central (Eureka) (was D411) FMN Emergency Ops
854.1875WQJY940 RM CSQ StLCo Sirens C3 Siren Data - Central (Eureka) (was D351) FMN Emergency Ops
856.6125WQNP228 RM 351 DPL StLCo Sirens S2 Siren Data - South (Clayton) FMN Emergency Ops
809.1875WQJY940 F 411 DPL StLCo Sirens S3 Siren Data - South (Ballwin) FMN Emergency Ops
North County Police Cooperative
Patrols Beverly Hills, Charlack, Dellwood, Flordell Hills (6/24), Hanley Hills, Pine Lawn, Uplands Park, Velda City (6/25), Velda Village Hills, Vinita Park, and Wellston

See the WIKI for more information

St. Louis Area Trunked Emergency Radio (SLATER)
Project 25 Phase I
Police dispatched on encrypted talkgroup 55400 (see North Central Dispatch Center below)
Government
Missouri Statewide Wireless Interoperable Network (MOSWIN)
Project 25 Phase II
All Communications, most departments including County Jail and Government Center, Parks
MetroTransit -- MetroBus/MetroLink (Bi-State Development)

For much more info, see the Bi-State/Metro Wiki 

Missouri Statewide Wireless Interoperable Network (MOSWIN)
Project 25 Phase II
Public Safety, Admin, Fixed Route Buses, MetroLink, Shop, Maintenance and most other communications. Use sites 206, 207 and 208. Talkgroups 10401-10449
Warner Communications-BJC Hospitals (NXDN)
NXDN NEXEDGE 4800
Call-A-Ride communications
St. Louis Metropolitan Sewer District (MSD)
Covers 525 sq m in all of St Louis City and 80% of the county; serving 1.4 million people. Responsibilities include the interception, collection and treatment of wastewater, as well as stormwater management. See the WIKI for additonal frequencies  
Metropolitan St Louis Sewer District
DMR Hytera XPT
Operations
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
468.875WQTW239 F MSD Lemay 4 Lemay Dump Station, UV Blding Telm Data
451.3625WPLT464 M MSD Lemay 5 Wastewater Data (Lemay; licensed to state) Telm Data
451.6125WPXC496 RM CC 12
TG 16777215
SL *
MSD Lemay 6D Lemay Treatment Plant (SL 1/2) DMR Utilities
452.8625452.86250 M CC 3
TG 1
SL 1
MSD Lemay 8D Lemay Treatment Plant DMR Utilities
453.9625WRNM249 RM CC 14
TG 16777215
SL *
MSD Lemay 7D Lemay Treatment Plant (SL 1/2) DMR Utilities
464.500 M 423 DPL MSD Lemay Lemay Treatment Plant: Ops FMN Utilities
456.3125WQGN409 M MSD Meramec 1 Meramec Treatment Plant FMN Utilities
451.3125WQGN409 M MSD Meramec 2 Meramec Treatment Plant Telm Data
158.880KNBC996 M MSD SH Data 1 Operations (Sunset Hills) FMN Utilities
453.750KNBC996 RM MSD SH Data 2 Sewer Data (Sunset Hills) (CSQ) Telm Data
453.675KNGU704 RM MSD Data Flor 1 Data (Florissant) (CSQ Data) Telm Data

EMS Agencies

HEAR / Hospitals
For HEAR (Patient Reports/ER) frequencies, see the Hospitals Database page
AMR Abbott EMS - St Louis
Mainly serves St. Louis City/County, but also provides non-emergency transfers to Jefferson, Franklin and other counties. (and to Illinois) 
Dispatching via CAD (LOGIS), since 2017.  MED-10 used as back-up. Belleville still uses MED-9 UHF for tone-outs of 911/Emergency Calls. 
See St Clair County IL and the WIKI for more information
St. Louis Area Trunked Emergency Radio (SLATER)
Project 25 Phase I
Is assigned talkgroup 200. Abbott dispatch may call East Central Dispatch here. NO NORMAL USE.
Missouri Statewide Wireless Interoperable Network (MOSWIN)
Project 25 Phase II
EMS units located at some St Louis City Firehouses are dispatched on talkgroup 10201 (as of 6/22)
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
462.975KMK409 RM 192.8 PL Abbott EMS MO EMS: Missouri Ops - Back-Up [MED-10] FMN EMS Dispatch
Christian Hospital EMS
464.825
469.825
RM
192.8 PL
CHNE/AMH EMS
EMS: Dispatch - Alton Memorial Hospital (former CHNE EMS)
St. Louis Area Trunked Emergency Radio (SLATER)
Project 25 Phase I
EMS Dispatch on talkgroup 205 (no longer using UHF)
STARCOM21 Statewide Illinois
Project 25 Phase II
Alton and Wood River 911 PSAPs contact "Christian EMS Dispatch" on talkgroup 7323 (MCE 911) to request Alton Memorial Hospital EMS response in their areas
MedicOne EMS
See the WIKI for additional information on digital/unit numbers
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
452.675WRCF930 RM CC 1
TG 1
SL 1
MedicOne EMS 1 EMS: Dispatch DMR EMS Dispatch
452.675WRCF930 RM CC 1
TG 2
SL 2
MedicOne EMS 2 EMS: Ops DMR EMS Dispatch

911 Dispatch Centers

St Louis County Police
St. Louis Area Trunked Emergency Radio (SLATER)
Project 25 Phase I
Dispatches County Police and most municipal Law agencies in the county.  (Nearly all communications are encrypted)
Central County Emergency 911 (Fire/EMS)
See the WIKI for more information; 154.28 VFIRE21 is used for area Mutual Aid (KAF919)
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
154.325KAF919 B 210.7 PL CCE Fire North (BACKUP) Fire: Station Alerting FMN Fire Dispatch
154.220KAF919 B 114.8 PL CCE Fire Central (BACKUP) Fire: Station Alerting FMN Fire Dispatch
154.160KAF919 B 192.8 PL CCE Fire South (BACKUP) Fire: Station Alerting FMN Fire Dispatch
East Central Dispatch Center
See the WIKI for more information
St. Louis Area Trunked Emergency Radio (SLATER)
Project 25 Phase I
Police dispatch on talkgroups 55327 and 55328 (encrypted). Automated Fire Dispatch on talkgroups 54701, 54702. Fire Tactical on talkgroups 54723-54732, 55802 and 55807 (as of 4/28/15)
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
151.055KNAX731 B 412 DPL ECDC Fire B/U (BACKUP) Fire/EMS (?? Simulcast on SLATER TG 54701) FMN Fire Dispatch
West Central Dispatch Center
See the WIKI for more information
St. Louis Area Trunked Emergency Radio (SLATER)
Project 25 Phase I
Police dispatch on talkgroups 55414, 55415 and 55416 (all encrypted).
North Central Dispatch Center
See the WIKI for more information
St. Louis Area Trunked Emergency Radio (SLATER)
Project 25 Phase I
Police dispatched on encrypted talkgroup 55400 (Saint Ann, Edmundson, Northwoods, North County Police Cooperative {Beverly Hills, Charlack, Dellwood, Pine Lawn, Vinita Park, and Wellston.})

Municipalities and Districts

Ballwin
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
462.075WSHW314 RM BallwinGolfCours Ballwin Golf Course (Voice/Data) FMN Public Works
Bridgeton
St. Louis Area Trunked Emergency Radio (SLATER)
Project 25 Phase I
Police use talkgroup 55306 for Dispatch. (As of April 2015)
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
453.850KVR948 RM 107.2 PL Brid ParkRec/Bus Parks / Recreation Center/Buses? [Expired 11/24] FMN Public Works
Chesterfield
St. Louis Area Trunked Emergency Radio (SLATER)
Project 25 Phase I
Police use talkgroup ????? (encrypted) (and patrol for Clarkson Valley)
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
854.5125WNYQ438 RM 311 DPL Chst PubWrks Public Works / Snow Plows [Expired 2/22] FM Public Works
Creve Coeur
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
464.550 M 67.0 PL CrCr GolfCrs Creve Coeur Golf Course (Municipal) FMN Public Works
Eureka
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
158.925KWT733 RM 103.5 PL Eureka Local Events / Local Interop FMN Multi-Dispatch
155.145KWT733 F Eurk PW WDD Water Data (CSQ) Telm Data
Fenton
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
158.955WNMJ345 BM 103.5 PL Fntn PubWrks Public Works [Expired 8/23] FMN Public Works
Florissant
St. Louis Area Trunked Emergency Radio (SLATER)
Project 25 Phase I
Police use talkgroup 55333 for Dispatch. (As of April 2015)
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
465.5625WNUH578 F 131.8 PL Flor Police RF Old Remote Link (Tone Carrier - Active 9/21; Expired 2015) FMN Law Tac
Kirkwood
St. Louis Area Trunked Emergency Radio (SLATER)
Project 25 Phase I
Police dispatched on talkgroup 55343 (encrypted) (also patrols for Oakland)
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
158.760KBA754 RM 146.2 PL Krkwd Fire T/Out Fire: Tone-Outs [Expired 3/23] FMN Fire Dispatch
151.670WQRX762 F Kirkwood WDD Water Data (CSQ) Telm Data
University City
St. Louis Area Trunked Emergency Radio (SLATER)
Project 25 Phase I
Fire, Public Works and City Channels (4/24/15) Fire traffic is on U-City Fire, Muni Main, and Fire Tacs 40-49 talkgroups.
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
154.370KAF919 B 192.8 PL CC911 UCity Fire Fire: Paging / Station Alerting FMN Fire Dispatch

Schools

Miscellaneous

All schools have been moved to their own Database page and WIKI 
St Louis CITY schools Database page and/or the WIKI

Higher Education

Miscellaneous
Also see St Louis City Higher Education for other facilities
Concordia Seminary (Richmond Heights)
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
461.5625WQFV263 RM 632 DPL CS Maintnce A Maintenance / Ops (LP) FMN Schools
Maryville University
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
451.625KNDD561 RM CC 3
TG 1
SL 1
MU Security TG1 Security DMR Security
451.625KNDD561 RM 074 DPL MU Security Security FMN Security
461.0125KNDD561 RM 432 DPL MU Maintenance Maintenance (Low Power/Phone Patch) FMN Business
464.475KNDD561 BM MU Operations Operations FMN Business
Missouri Baptist College
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
464.050WQNF810 RM 123.0 PL MoBapCollege Security / Maintenance [Expired 1/21] FMN Schools
St. Louis Community Colleges (STLCC)
See the WIKI for additional information and frequencies
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
151.1675WQXW558 RM CC 3
TG 1677215
SL 2
StLCC PD Emergency Call Boxes DMR Schools
151.1675WQXW558 RM CC 3
TG 1677715
SL 2
STLCC ? Emerg Emergency Call Boxes (?)) DMR Emergency Ops
151.1675WQXW558 RM CC 1
TG 1677715
SL 1
STLCC Cass Emerg Emergency Call Boxes (Cass Ave?) DMR Emergency Ops
151.1675WQXW558 RM CC 1
TG 1
SL 1
STLCC Cass Ave Operations (Cass Ave) DMR Schools
151.205WQXW558 RM CC 4
TG 1677215
SL 2
STLCC Brdwy Emrg Emergency Call Boxes (300 S. Broadway) DMR Emergency Ops
154.1375WQXW558 RM CC 6
TG 1677215
SL 2
STLCC Meramec Operations (Meramec) DMR Schools
155.535KQL917 RM CC 4
TG 16777215
SL *
StLCC Police Campus Police DMR Law Dispatch
155.535KLW330 BM CC 2
TG 200
SL 1
StLCC PD 2 Campus Police (Florrisant Valley-Fergeson) DMR Law Dispatch
155.535KQL917 RM CC 5
TG 400
SL 2
StLCC PD 3 Campus Police (Forest Park) DMR Law Dispatch
155.535KQL917 RM CC 5
TG 500
SL 1
StLCC 500 Campus Police (Forest Park) DMR Law Dispatch
155.535KRT720 RM 82.5 PL StLCC PD 1 Campus Police (Meramec-Kirkwood) (with Telephone interconnect) FMN Law Dispatch
155.535WQPG463 RM CC 4
TG 300
SL 1
StLCC PD 4 Campus Police: Dispatch DMR Law Dispatch
155.535WQPG463 RM CC 4
TG 200
SL 1
StLCC PD ? Campus Police: Dispatch (heard Ferguson) DMR Law Dispatch
155.535WQPG463 RM CC 9
TG 16777215
SL 2
StlCC 16777215 Emergency Call Boxes DMR Emergency Ops
155.535WQPG463 RM CC 9
TG 100
SL 1
StlCC 9-100-1 Maintenance? (Phone Patch) DMR Schools
155.535WQPG463 RM CC 2
TG 16777215
SL 2
StLCC PE Physical Education - Call Box #210 (Tamper Alarm) DMR Schools
452.175WNXA653 RM STLCC PPKW2 Operations (Kirkwood) FMN Schools
452.175WQGV481 RM StLCC WW Operations (Wildwood) FMN Schools
452.8875WNXA653 RM CC 7
TG 3000
SL 2
STLCC StlC A Operations (St Louis City) DMR Schools
453.475WQNB565 BM StLCC CBx FV Call Boxes (Florrisant Valley-Ferguson) (CSQ Hard Data) Telm Data
453.475KQL917 BM StLCC CBxFP Call Boxes (Forest Park) Telm Data
461.550WNXA653 RM 114.8 PL StLCC NHS Ops Center for Nursing and Health Sciences: Ops FMN Schools
461.550WNXA653 RM 151.4 PL STLCC PP 3 Maintenance / Ops (StL,Kirkwood,Ferguson) FMN Schools
461.550WNXA653 RM 464 DPL StLCC Kirwood Security / Ops (Kirkwood) FMN Schools
462.375WNXA653 RM CC 1
TG *
SL *
STLCC PP*6 Operations (both) DMR Schools
464.850WNRF515 RM 151.4 PL StLCC PP 4 Physical Plant (StL,Kirkwood,Ferguson) FMN Schools
464.850WQGV481 RM 151.4 PL StLCC PP 5 Physical Plant (Wildwood Campus) (CW-ID CSQ) FMN Schools
St. Louis University (SLU) / Parks College
 See St Louis City Database page
University of Missouri - St. Louis (UMSL)
St. Louis Area Trunked Emergency Radio (SLATER)
Project 25 Phase I
Police using talkgroup 55409 (as of 5/15/15)
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
451.725WPTL320 RM CC 1
TG 30
SL 1
UofM 451725 TG30 Operations DMR Schools
451.725WPTL320 RM CC 1
TG *
SL 2
UofM 451725 SL2 Emerg Enc Bcast OVCM Private Call DMR Schools
463.3625WPTL320 RM CC 1
TG 30
SL *
UofM Ops 30 Operations DMR Schools
452.975WPTL320 RM CC 1
TG 110
SL *
UofM MH Ops 110 Operations (Marillac Hall) DMR Schools
452.975WPTL320 RM CC 1
TG 120
SL *
UofM MH Ops 120 Ops / Exterior Care (Marillac Hall) DMR Schools
451.8375WQVZ569 RM CC 1
TG 120
SL *
UofM 120 Ops Ops (Venton Hall) DMR Schools
451.8375WPTL320 RM CC 1
TG 110
SL 1
UofM 110 Maintnc Maintenance (Venton Hall) DMR Schools
464.8375WQIN401 RM 143 DPL UofM Parking 1 Parking Department [Expired 3/18] FMN Schools
461.3875WPZC595 RM 131.8 PL UofM TPAC R1 Touhill Performing Arts Center: Audio/Video Ops FMN Schools
452.800WQNB249 RM 167.9 PL UofM TPAC R2 Touhill Performing Arts Center: Ops [Expired 12/20] FMN Schools
461.300WQNB249 RM 127.3 PL UofM TPAC R3 Touhill Performing Arts Center: Audio/Video/Stage Ops [Expired 12/20] FMN Schools
464.050WQNB249 RM 114.8 PL UofM TPAC R4 Touhill Performing Arts Center: Audio Ops [Expired 12/20] FMN Schools
467.7625WQCD505 M 146.2 PL UofM TPAC P8 Touhill Performing Arts Center: Ops/Carrier (Wireless Mic?) FMN Schools
WashU / Washington University
Located in 4 different jurisdictions, the main Danforth Campus is bordered by Forest Park and the cities of St. Louis, Clayton and University City. Also, a West Campus in Clayton, North Campus in the West End neighborhood of St. Louis, and Medical Campus (WashU Medicine Campus at Barnes Hospital complex) in the Central West End neighborhood of the city of St. Louis.   For Medical Campus, see Operations and Facilities Management Department (OFMD) at St Louis City Higher Education

See the WashU WIKI for more info and frequencies.
St. Louis Area Trunked Emergency Radio (SLATER)
Project 25 Phase I
Danforth (Main) Campus Police uses talkgroup 55419 for Dispatch/Ops (encrypted) (as of 6/13/15)
Warner Communications-BJC Hospitals (NXDN)
NXDN NEXEDGE 4800
School of Medicine Protective Services (Security, Safety, Escorts), and Emergency Management on talkgroups 34-37
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
155.265WPEC247 M WU Transport Transportation (not D516) FMN Transportation
159.090KLU447 RM 723 DPL WU EST Medical (Danforth) Emergency Support Team (EST) (Response to medical calls) FMN EMS Dispatch
461.5125WQHI219 RM 172 DPL WU CampusService (Danforth) Campus Services FMN Schools
453.400KLU447 RM 146.2 PL WU Security U1 (FORMER) Campus Police FMN Law Dispatch
462.075WPTK536 RM 251 DPL WU LearningCentr (FORMER) Learning Center: Ops (LP) [Expired 10/21] FMN Schools
Webster University (Maplewood)
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
462.1125WPMT954 RM 565 DPL WebsterU Securty Security [Expired 12/23] FMN Security

Missouri State

Missouri Institute of Mental Health
5400 Arsenal
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
155.865WQTN535 BM 82.5 PL MIMH StL Ops Operations [Terminated 3/15] FMN Security
Missouri Veteran's Home (Bellfontaine Neighbors)
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
453.5875WQIZ276 RM CC 1
TG 10
SL 1
MO Vet Home 10 Admin/Maintenance (check CC) DMR Business
453.5875WQIZ276 RM CC 1
TG 20
SL 2
MO Vet Home 20 Admin/Maintenance (check CC) DMR Business