Utility billing is mailed to customers on the last day of each month. Payments are “Due Upon Receipt”. Payments are late if received in the office, or by mail after the close of business on the 15th of each month. Online payments follow the banking rule–if made after 4pm, the payment will be posted with the next days business date. Please plan accordingly to avoid penalties being applied to your account for late payments especially when the 15th falls on a Sunday.