Water Supply, Quality, Pressure, Meter Restrictions, And Rate Case


EPCOR provides their monthly update and highlights where the community stands for the summer water supply, improvements to water quality and water pressure, an update on new meter restrictions, and an update on the Arizona Corporation Commission’s decision on the future rate case.

Water Supply

Our work over the last seven months to ensure adequate water supplies for this summer is paying off. Through a combination of strategies to increase sources of clean water, we expect supplies to meet demand and that customers will not see a repeat of last summer’s water shortages.

As of the end of May, the San Tan Well #1 is up and running and Magma Well #1 is expected to be running by mid-June. Each well brings an extra 600 gallons per minute (gpm) into the system. An additional power upgrade is in the works that will increase the amount of water San Tan Well #1 can produce to 1,100 gpm – that work is expected to take another 60 days.

We’re also evaluating the Crestfield 2, Ellsworth and McRae wells, and a comprehensive groundwater supply study is in the works to evaluate wells within and outside the existing system for potential new sources of water.

Improved Water Quality and Water Pressure

Our team is making headway installing technologies to improve water quality at various locations. The reverse osmosis (RO) system at Morning Sun Farms started operating in early May, and the new ion exchange (IX) system at the Main Yard started full operation in early June. Another new RO unit is also up and running at Johnson Ranch Well #4 to aid with blending at the Main Yard. It will remain in operation until the IX treatment system is expanded.

We’ve installed a flow meter along with a pressure reducing valve (PRV) from the Magma and Ricky wells, resulting in improvements in water pressure in the Magma and Magic Ranch areas.

EPCOR Receives Approval to Lift New Meter Restriction in Region 4

We’re very pleased to announce that the restriction on new service connections has been removed for Region 4 of the Johnson service territory, which includes the Wild Horse, Crestfield and Magic Ranch areas. On May 21, the Arizona Corporation Commission (ACC) approved our recommendation. The restriction is still in place for Regions 1 and 2 of the Johnson water system, and we’ll continue to update customers, the development community and the public on as we continue to make more progress. 

Future Rate Case Update

At the ACC’s May 21 Open Meeting the commission also issued a new decision regarding a rate case for Johnson Utilities. You may remember that the rate case originally filed by Johnson Utilities on December 29, 2017, was withdrawn in March 2019.

Instead, the ACC has ordered EPCOR to file, as the interim manager for Johnson Utilities, a new rate case by the end of 2019, using a test year that shows what it cost to provide your service no later than from September 1, 2018 to August 31, 2019. This decision replaces the ACC’s decision in March requiring Johnson Utilities, through EPCOR, to file a new full rate case application before May 1, 2020.

EPCOR’s rates, regulatory and financial experts will be focused on developing this application this fall. Once the application is ready for the ACC’s review, all customers will receive information and invitations to open houses where they can learn more.