I finally got the owner's email address and let him know about the issues with the PM, which I thought would end it but it hasn't.

You can search by address as well to see if something falls within a zone.

The address is 1118 Ursula Avenue, University City, MO 63130.  

I already have a call in to my realtor to find out the details from the MLS listing.

Of course electric, water, and sewer will need to be addressed.

Maintenance requests are handled online as well, if a tenant submits a maintenance request, you recieve an email with the address, unit, tenant contact info, and their detailed explanation.

You are going to want to talk to several professionals in your state for this one as it is a legal maneuver that amateurs or even professionals not familiar with the details of your situation on the internet probably aren't going to be able to help with much.

I'm always in favor of playing devil's advocate, but it's not possible to "force complexity...for the benefit of deeper understanding and analysis" when we have no details of cost, upfront cash, closing costs, rents and room for raising them, etc, etc. 

Without the whole story and all the dirty details we can't know why the tenant even thinks this.I take it from the info relayed that the sewage issue is still on going.

Hi,  I have a problem I think I've solved but I lack the experience to work out all the details.