Rates for private utilities in Arizona, like Brooke and EPCOR, are based on actual costs and capital investments that occurred at a past point in time. In 2017 Brooke filed an application to update rates – that application was put on hold by the ACC while a transfer of ownership was explored. In 2019, Brooke's rate application was combined with EPCOR's request to acquire and the proposed rates in Brooke's application were updated for costs and investments through September 2019. The ACC approved changes to Brooke's water rates on July 22, 2020 – before EPCOR acquired Brooke. The ACC also approved the sale of the Brooke Water assets to EPCOR, to be included in EPCOR's Havasu district. As part of EPCOR's Havasu district, Brooke will be considered along with all other EPCOR water customers in EPCOR's current 2020 rate case.
The last time Brooke changed rates was more than 25 years ago – costs have changed quite a bit since then. Brooke had a rate change request in with the ACC before EPCOR agreed to acquire the system. The ACC reviewed Brooke's rate change request at the same time that it reviewed EPCOR's application to acquire the system.
The ACC ultimately made that decision on July 22, 2020 and the new Brooke rates became effective on August 1, 2020. The average Parker-region customers in the Havasu district using an average of 2,438 gallons a month would see a monthly increase of roughly $8. Customers using 7,000 gallons a month would see an increase of roughly $12.
You'll find a detailed list of rates for Parker-area customers of the Havasu district here.