For Star subscribers: Arizona looks at proposals to allow some development to use groundwater in fast-growing fringes of the Phoenix area — after halting new growth relying on groundwater there.
Tony Davis Arizona's water director is looking at proposals to allow some development to use groundwater in fast-growing fringes of the Phoenix area — just a month after halting new growth relying on the aquifer there.
People are also reading… The department also signaled it might be open to considering changes in the computerized groundwater model for the Phoenix water management area that it released June 1. The model projected the total amount of groundwater available in the Phoenix area over the next 100 years would likely fall about 4% short of expected demand. But it drew a lot of questions and unfavorable comments from water interest groups when it was unveiled.
At this time,"we cannot say whether any proposals" that come out of this committee and others coming from the parent Governor's Water Policy Council"will affect just one or all" of the state's five water Active Management Areas, including one governing the Tucson area, said Shauna Evans, an ADWR spokeswoman.
That is one of the prime development areas for which the state has now found insufficient groundwater exists for the next 100 years. She's concerned about ADWR projections that, despite the new state limits on groundwater pumping for new homes, the overdraft of groundwater in the Phoenix area is expected to grow from 23,000 an acre-foot yearly from 2000 through 2021 to 387,000 acre-feet yearly by 2121.
Also unsustainable. she said, is the state's current rule, allowing groundwater to be depleted by up to 1,000 feet in the Phoenix and Tucson areas and 1,100 feet in Pinal County if the aquifer is replenished by renewable supplies elsewhere. Since developers of subdivisions, unlike developers of all other projects, are required to replenish the aquifer with the amount of water that they pump,"Why are we the only projects stopped? Why can we not continue to grow on groundwater?" he asked.
She also criticized a common practice by many subdivision developers of pumping groundwater near their projects but replenishing the aquifer elsewhere, saying,"That has not necessarily been looked at as the best idea." 'Wildcat' subdivisions a problem The Assured Water Supply Committee is part of the new State Water Policy Council that Gov. Katie Hobbs established upon taking office in January. The committee's task is to identify ways to strengthen the Assured Water Supply program and allow for growth based on other water supplies besides groundwater, ADWR has said.
He wants a requirement that any new community of one or more detached units can't get building permits without obtaining a state assured water supply certificate. Such a requirement would also apply to"build to rent" subdivisions that build homes only for rental purposes as a way of escaping the state's assured water supply rules for for-sale housing subdivisions.
Besides CAP, other water supplies that could be comingled with local native groundwater might include treated sewage effluent, desalinated water, non-CAP Colorado River water transferred to the Phoenix area, and groundwater imported from the Harquahala Valley in Western Maricopa County. "We all could probably agree that the nature of those supplies for cities with CAP allocations has worked really well," Buschatzke said at the meeting."The development has occurred. We haven't seen the infrastructure not be built."
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