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Older facilities: Use about 4 gallons of water per gallon of ethanol
Newer facilities: Use about 2.5 to 3 gallons of water per gallon of ethanol
Ethanol plants: Recycle most of the water they use, and the rest is released into the atmosphere as steam

toolmanmike said
At least:
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It takes around 2.7 to 3.5 gallonsof water to produce one gallon of ethanol:

Older facilities: Use about 4 gallons of water per gallon of ethanol

Newer facilities: Use about 2.5 to 3 gallons of water per gallon of ethanol

Ethanol plants: Recycle most of the water they use, and the rest is released into the atmosphere as steam

Sheep I tell ya sheep. Casey’s has ethanol free at the pump. Just sayin