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APS to convert Cholla power plant from coal to natural gas. It expects water usage to be the same

The Cholla Power Plant near Joseph City, Arizona.
APS
/
Handout
The Cholla Power Plant near Joseph City, Arizona.

Earlier this month, APS announced that it plans to convert its Cholla coal plant to natural gas by 2029. While APS says it will reduce emissions, the utility expects water use to be about the same.

Natural gas plants are often touted for using less water than their coal counterparts.

A report from the U.S. Energy Information Administration found that, on average, natural gas water usage was about seven times lower than coal.

But in a recent document submitted to the Arizona Corporation Commission, APS says it intends to use the same processes for steam generation and cooling from the plant’s coal days.

The utility expects the plant to use about 6,600 acre feet, or about 2.2 billion gallons of groundwater a year. In 2020, Cholla consumed almost 3 billion gallons.

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Greg Hahne started as a news intern at KJZZ in 2020 and returned as a field correspondent in 2021. He learned his love for radio by joining Arizona State University's Blaze Radio, where he worked on the production team.