Arizona Attorney General Challenges Massive Utility Rate Hikes in Robson Ranch Retirement Community
Agent
Constitutional Duty at Stake as AG Mayes Fights ACC Decision
PHOENIX — Arizona Attorney General Kris Mayes has challenged a decision by the Arizona Corporation Commission that would nearly double water and sewer rates for residents of the Robson Ranch retirement community, arguing the approval violates the state constitution's mandate to protect captive customers from monopoly utility exploitation.
The Democratic attorney general filed an application for rehearing with the ACC Monday after the panel approved in a 3-2 vote to increase the water rate for Robson Ranch by nearly 23 percent and its sewer rate by 154 percent on March 4.
"The Arizona Corporation Commission exists to protect ratepayers from exactly this kind of rate shock," Mayes said in a statement.
The attorney general's office argues that the commission failed in its "constitutional duty" to protect homeowners who now face bills they didn't plan for.
Private Equity Firm Takes Over Utilities After 27 Years
The controversy centers on Picacho Water Company and Picacho Sewer Company, which served Robson Ranch residents for decades. The utilities were owned by Robson Communities, the homebuilder that developed the retirement community south of Casa Grande.
For 27 years, Robson Communities kept rates low for residents. But in November 2024, the developer sold the utilities to Phoenix-based JW Water, which is owned by a Netherlands-based investment firm. After the sale, the new owners asked for and got the massive rate hikes now being challenged.
"Arizona's founders enshrined the Corporation Commission in the state constitution specifically to protect consumers from exploitation by monopoly utilities. When the Commission fails to fulfill that role, my office will step in to protect Arizonans," Mayes said.
The Arizona Constitution requires the ACC to set "just and reasonable rates." Mayes said the commission's decision constitutes "the very definition of rate shock, constituting an utter disregard of the impacts to residential ratepayers – a violation of Arizona law."
What the Rate Increase Means for Residents
Under the new increased rates, Robson Ranch customers will be paying $36.87 per month on average for water and $106.73 per month on average for sewer. Before the rate increases, the average water bill per month was $30.01 and $42.00 per month for sewer services.
The combined water and sewer bill will increase by $76.63 per month in April, according to the administrative law judge overseeing the case.
"Robson Ranch residents have no alternative utility providers; they are captive customers of Picacho Water Company and Picacho Sewer Company, with no ability to shop for better rates or switch to a competitor," Mayes said.
Mayes also argued that the commission failed to review documents related to the utility sale before approving the increase.
ACC Commissioners Defend Decision
ACC Chairman Nick Myers defended the rate increase, saying the commission's job is to balance financial integrity of the utility, long-term system sustainability and ratepayer impact.
"The commission's job is not to freeze bills," Myers said. "It is to balance financial integrity of the utility, long term system sustainability and rate payer impact."
ACC Vice Chair Rachel Walden said JW Water is not "recovering revenue losses over the course of the past 25-plus years, nor are they recovering the purchase price of the utilities." She added that this rate case only pertained to establishing rates to "cover the cost of services."
Both Myers and Walden voted in favor of the rate increases.
Two Commissioners Vote Against Increase
Two ACC commissioners voted against the rate increase proposal.
ACC Commissioner Kevin Thompson, who voted against the increase, said the rate increases "should adhere to principles of gradualism."
"As a regulator, I felt I had a duty to advocate for a resolution that strikes an appropriate balance between all parties and not subject these ratepayers to the consequences of business decisions that were no fault of their own," Thompson said.
Commissioner Lea Márquez Peterson, the other ACC commissioner to vote against the increase, said JW Water should have conducted more public outreach and communication about the sewer utility case to the ratepayers.
"We received many public comments concerning the dramatic rate increase though an increase was certainly expected from a utility who hadn't filed a rate case in over 25 years," Márquez Peterson said. "I believe that more could have been done to promote gradualism in the sewer rate case."
Staff Testimony on Rate Impact
During the rate case, commission staff testified about the rate impact. Briton Baxter, the commission's utilities director, later tried to walk back comments suggesting staff doesn't care about rate impact to customers.
"So I don't want the commissioners to believe that staff doesn't care about the rate impact to the customers," Baxter said. "We do, but, and I know there's going to be some cringing when I say this, as an accountant, sometimes the numbers are what the numbers are. We look very closely to find opportunities to recommend adjustments that make sense and that we're comfortable with."
Residents had asked the commission to phase in rate increases and requested commissioners look into the sale. The Center Square reached out to JW Water, but did not hear back before press time.
Sources
- Mayes challenges ACC rate hikes for Robson Ranch residents | Arizona | The Center Square: https://www.thecentersquare.com/arizona/article_a0f4305f-262b-4bb7-bd84-d0b06af0a920.html
- Arizona AG challenges massive utility rate hike for community near Casa Grande | Arizona's Family: https://www.azfamily.com/2026/03/31/arizona-ag-challenges-massive-utility-rate-hike-community-near-casa-grande/
- Mayes challenges utility rate hike in Robson Ranch retirement community in Eloy | KJZZ: https://www.kjzz.org/politics/2026-04-01/mayes-challenges-utility-rate-hike-in-robson-ranch-retirement-community-in-eloy