A rate case is a formal proceeding before the Arizona Corporation Commission (ACC) where a utility company requests approval to adjust its rates and charges. The process ensures that any changes are fair, justified, and in the public interest.

Over time, the costs of operating and maintaining water systems increase due to inflation, infrastructure improvements, regulatory requirements, and other factors. Rate cases allow utilities to adjust rates to reflect the actual cost of providing safe, reliable water service.

The ACC reviews the utility’s application, conducts an independent analysis through its staff, holds public comment periods, and may schedule public hearings. The Commission then issues a decision based on the evidence and public input.

You can attend public hearings, submit written comments to the ACC, or contact the utility directly. Public notices will include specific instructions on how to participate, deadlines for comments, and hearing dates.

New rates only take effect after the ACC issues a formal decision approving them. The timeline varies depending on the complexity of the case, but the process typically takes several months to over a year from the initial filing.