Water and Wastewater Rate Review

Welcome to our online open house

In this section you’ll find information about the Arizona Corporation Commission rate review process for our Arizona wastewater, Luke 303 wastewater, and Rio Verde water and wastewater districts.

What’s a rate review and how does it work?

EPCOR is a regulated utility, which means that the Arizona Corporation Commission reviews and sets rates for the service EPCOR provides to its customers. The rate review process is an open and transparent process, overseen by an administrative law judge, that determines the appropriate rates that should be charged based on a certain point in time, called a test year. A rate review can take up to two years or more, beginning with the test year that the data in a rate review is based on. Because a test year is a point in the past, rates for service typically lag behind current costs by several years or more.

Learn more about the rate review process.

Rate review application and supporting documents

Water is part of everyday life. Whether you’re starting the morning with a cup of coffee or cooking dinner for your family, we’re focused on making sure your water is there for you. We’re also making sure not a drop is wasted, purifying wastewater so it can be safely returned to the natural water cycle for use in the future or for irrigation purposes.

Safe, clean and reliable drinking water is a universal need – protecting customers, careful stewardship of the water you rely on, and thoughtfully balancing differences where they arise, are at the heart of this application.

Water is even more precious in the desert. Our team works every day to ensure that safe, clean, reliable and affordable drinking water is there when you need it. Where also focused on a clean and sustainable water future, carefully protecting and preserving water resources and returning every drop possible to the natural water cycle.

We’re required to file this rate review application, according to previous decisions from the ACC. We filed the case, as required, August 31, 2022, giving the ACC the information it needs to determine current rates, based on fresh financial data from 2020.

The rate review process takes about a year – the ACC is expected to make a decision by late 2023. You can download a summary of the application below.

Supporting documents

The application

Rate Review Application, August 31, 2022

Information sessions and public comment meetings

Read the presentation

Water and wastewater rate review

The ​application​​

Information sessions and public comment meetings

The application