ARCH 'CAN' come from anywhere...... depending on where the current units are... if they are at base, at a hospital, or en route home to base.
Jersey County, they can come from St Louis Hospitals, Granite City or the Litchfield base.
Macoupin/Montgomery, usually come from the Litchfield base.
MetroEast (Bond, St Clair, Madison, Clinton and beyond) are often from the Granite City base, but in some cases the Litchfield chopper may be able to get there quicker.
Simply listen to 155.055 for LZ ops, Landing Zone ops or the local Fire or EMS repeaters. ARCH in the past has used QEMs 151.31, Jersey County 155.805, but is usually going to I-REACH (155.055) or IFERN (154.265) on most calls in Illinois.
Dispatch is now from "AIRCOM" which is connected to outer based repeaters via telephone/internet/satellite connections
As already given below.... I've already compiled all this information from my years of listening AND from some people on the inside.
Also see the WIKI article at:
Medical Helicopters / EMS Agencies (Area Wide) (MO) - The RadioReference Wiki
There is also information on the IL Medical Helicopter Database page;
EMS / Ambulance / Medical Helicopters / IDPH Scanner Frequencies and Radio Frequency Reference
If I were you, program in
155.055 CSQ
154.265 CSQ and/or 210.7 PL
462.525 192.8
467.525 192.8 (input)
462.075 107.2
467.075 107.2 (input)
Just for interest sake, AirEvac an serve any part of the area too, depending on subscribers (paid members) and needs. You can often hear these aircraft talking from far away, and most of the dispatch centers come in pretty good in the Metro East IL area.
151.50500 158.40000 WPYR891 RM AEvac Itin*R Nationwide Itinerant Repeater FMN EMS Dispatch
152.99750 WPYF285 BM 051 DPL AEvac JeffL1 Dispatch Hospitals & EMS (Jefferson County) FMN EMS Dispatch
173.37500 WQBD500 BM 032 DPL AEvac JefIL2 Dispatch (Bluford - Jefferson County IL) FMN EMS Dispatch
159.96750 WPWS479 BM 032 DPL AEvac MtStIL Dispatch (Mt. Sterling - Brown County IL) (Heard in St. Louis) FMN EMS Dispatch
152.99750 WPRL740 BM 032 DPL AEvac Cuba Dispatch (Cuba-Crawford County) FMN EMS Dispatch
159.70500 WPWS479 BM 032 DPL AEvac Cape Dispatch: heard AirEvac 35 calling "Cape" (@ Mt. Sterling - Brown Co IL) FMN EMS Dispatch
151.50500 158.40000 WPYR891 RM 072 DPL AEvac SpfldI Dispatch (Pawnee/Springfield IL) FMN Deprecated
159.69000 WQIF745 BM 072 DPL AEvac SpfdIL Dispatch (Springfield-Sangamon IL) (heard CSQ 2/10/08) FMN EMS Dispatch
159.67500 WQIA711 BM AEvac Quincy Dispatch (Quincy-Adams Co IL) FMN EMS Dispatch
151.50500 158.40000 WPYR891 RM 047 DPL AEvac Efnghm Dispatch (Effingham) FMN Deprecated
153.08000 WQIA711 BM 073 DPL AEvac TroyMO Dispatch (Troy-Lincoln Co MO) FMN EMS Dispatch
153.09500 WQIF745 BM 073 DPL AEvac OflnMO Dispatch (O'Fallon-St Charles MO) FMN EMS Dispatch
153.35000 158.14500 WQIA712 RM AEvac OzrkMO Dispatch (Gainesville-Ozark Co MO) FMN EMS Dispatch
153.51500 WQIF745 BM AEvac IndyIN Dispatch (Indianapolis-Marion IN) FMN EMS Dispatch
151.85000 159.84000 WQLD588 RM 047 DPL AEvacGreenup Dispatch (Greenup-Cumberland) FMN EMS Dispatch