The BC125AT will receive that. It looks like you will hear nothing but fire dispatch. Most of the St Charles Co activity is on the SLATER P25 trunked system. The site is simulcast. The SDS100 and SDS200 scanners are the only ones specifically designed to receive simulcast sites. Any other P25 Phase 1 or Phase 1 & 2 capable scanners may or may not work depending upon your location. P25 is digital. The BC125AT is for analog conventional frequencies only. It does not trunk. It will not work with the SLATER system.