Water tolls are invoiced every three months. Invoices are mailed out the first week of January, April, July and October after the water meters have been read. The base rate is billed in advance. For example the invoice sent out in April will include the base rate for April, May and June and consumption for the previous three month period of January, February and March.
Due date for water tolls are clearly marked on the invoice. Typically invoices are due 30 days after the billing date. Payments received after the due date are subject to a late payment penalty as per DBID bylaws.