My tenant did not pay their water bill, am I responsible to pay it?

A: YES   As the owner of the property you are responsible to pay the bill.   The WWSA will bill either the property owner or the tenant for each account.  As the property owner if you elect to have the tenant billed directly this is strictly a courtesy provided by the WWSA. If the tenant has any unpaid past due balances the property owner will be responsible to pay them.