The frequency of water billing from the City of Philadelphia Water Revenue Bureau typically follows a quarterly schedule. This means that customers generally receive their water bills every three months. However, billing practices may vary based on individual circumstances, such as the specific account type or usage patterns. In some cases, customers may also receive estimated bills if actual readings are not available. It is important to review the billing statement for details regarding charges and payment due dates. For the latest information and any updates regarding billing frequency or policies, it is advisable to visit the official webpage of the City of Philadelphia Water Revenue Bureau, where relevant information can be found.