I am about five miles west of the Quad Cities.but I am right on the river.looking at the site maps I should be within range.I am going to get another antenna just to be sure.
A different strategy - instead of immediately spending money and time on an antenna.
Program the scanner with a bank for FM channels and a bank programmed as EDACs. (and another bank programmed with your other EDACs if you aren't sure you're doing it right). Take the radio to the middle of the area served by the system and listen. FM should be loud and clear. See if the EDACS will trunk properly there.
Since this is a portable radio, and the system location should be less than 10 mi from you a few minutes spent listening and watching your scanner while you are bathed in very strong signals should tell you if you have the EDACS settings correct.
THEN you can work on getting a better antenna with confidence that you've got the programming in the radio right.
(take the manual with you so you can mess with settings while you sit in the park or parking lot or wherever you are receiving super strong signals)