@Paul Leason has a lot of great ideas on how to handle water. Here's a little more: Grand Rapids may be doing away with the Guardian copy of the bills. However, you can now pull a report online on all your properties and see the status of all of your tenants' water bills. This report is a life saver for staying on top of the bills before they are past due. I'm hoping to bring the Grand Rapids Water Department into the office for training on the new system and reporting for landlords soon. So, keep on the look out for it--you'll all be invited!
Additionally, Michigan state law enables a landlord to file a "water affidavit" for each of their rentals where the tenant is responsible for the bill. The affidavit prevents the municipality from putting a lien on your property for unpaid bills. Each municipal water service handles the filing procedures differently. The gist of most of these is that you must file a copy of the lease (or your tenant does) showing that they are responsible for the water bill and an affidavit signed by the tenant saying they understand they are responsible for the water bill, etc. Some municipalities will provide you with the form they want you to use--some will accept yours. Some (as in Grand Rapids) will also charge your tenants a water deposit--even if they don't charge other residents a water deposit. The deposit in Grand Rapids is nearly $500. (This of course increases the cost of rental housing in Grand Rapids and creates a disparate impact on tenants--but we'll not go there in this discussion.) Of course, there is always a loop hole whereby the city can get your money, i.e. they'll hold water up for ransom and not turn on the service for a new tenant until the old bill is paid--so, it behooves you to get the cash from the tenant before they move on.
Good luck with all your investments!
Clay