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​Interim rates for Arizona water districts

Rates for service in EPCOR's 11 water districts are set by the Arizona Corporation Commission (ACC) based on what it cost to provide your service anywhere from roughly five to 25 years ago. Operating costs have changed significantly in that time and more than $150 million has been spent to repair and replace the infrastructure—pipes, meters, valves, plants, etc.—that brings water to your home.  

On March 28, 2019, the ACC approved interim rates to recover changes in operating costs since rates were last set in each district.

What does that mean for you?

Current rates for your district remain in effect and will continue to appear on your bill as they do today. Interim rates will appear as a surcharge on your bill, calculated based on your individual usage. You pay for as much water as you use – below is an example for residential customers:



Supporting documents

What's next

The Arizona Corporation Commission (ACC) ordered EPCOR to file a new rate case by May 1, 2020.

To share your perspective on interim water rates, you can submit your comments by mail to the ACC, referencing Docket #WS-01303A-19-0011:

Arizona Corporation Commission
Consumer Services Section
1200 W Washington Street
Phoenix, AZ 85007

Comments can also be submitted by email. For instructions, visit