unpaid bill in my name

[Shain Cannon]

I have a tenant who is past due on a bill that is in my name, the lease agreement states the tenant will pay this bill (water). In the county the property is located this is the only bill I have to have in my name. The lease expires next month and I will not be renewing the lease. If the tenant does not pay this bill in full, can I use their security deposit to pay this bill? 

I have given the tenant multiple opportunities to rectify this issue, we've talked about it multiple times and come to find out he hasn't paid the bill since December.