Sorry that we have burst your bubble, but as many people do I imagine, look at prices of these things, dont get digitals that are needed and end up as you getting analog non trunked radios. I've fielded a few dozens that have done so as well here and many dozens more on these forums have also made the same mistake.
As mentioned if you were looking to get 911,
you do need to return that radio asap
Look at this link is where Ballwin is, its all digital trunked for which your radio is incapable of working on it.
St. Louis Area Trunked Emergency Radio (SLATER) Trunking System, St Louis Metro Area, Multi-State Under MODE if it’s D it’s in the clear, De sometimes clear, sometimes encrypted. DE is always encrypted.
Seeing the county is multiple towers for 911 - simulcast your looking at Uniden brands,
996P2, 325P2, 436HP, Home Patrol2, 536HP, SDS 100, SDS 200.
The SDS models are expensive, but work flawlessly in counties as yours with multiple towers.
Do NOT get any whistler brand scanners, they rarely ever work inside the county due to the 4 towers being used, garbled would be common if they did work. Whistler WS1040 or WS1065., TRX1 or TRX2
All you could hope to get on that radio is here, no trunked radio systems -
Scanner Frequencies and Radio Frequency Reference for St. Louis County, Missouri (MO)
www.radioreference.com
Under Tag column, anything listed as data is just that, no voice, anything that has DMR is digital and it wont work on that radio. Also these are also trunked cant get them either.
St. Louis County, Missouri (MO) Trunked Systems