Ethanol or Water: Which One?

Jonathunder, Wikimedia Commons


Growing and producing ethanol costs a lot more water than anyone realized. Nevertheless we make some 9 billion gallons worth every year in the US. That’s 13 to 17 percent of US corn production—with more coming down the pipeline.

But we could be a lot smarter about the process. Based on water use alone, some places grow reasonably cost-effective bioethanol while others produce an absurdly environmentally expensive brew.

Previous studies estimated that a gallon of corn-based bioethanol uses from 263 to 784 gallons of water from the farm to the fuel pump. But a new study assessed irrigation data from 41 states and found it’s as high as 861 billion gallons of water. And some places cost 2,100 gallons of water to produce one gallon of ethanol.

Bottom line: Colorado, Wyoming, Kansas, Oklahoma, California and New Mexico should not be growing ethanol. In the authors’ words: Continued expansion of corn production in these regions is likely to further aggravate expected water shortages there.

Better growing states: Michigan, Wisconsin, Ohio, Indiana, Kentucky. The authors conclude: The time left for improving water consumption is limited… and immediate action needs to be taken in order to prevent a problem shift from energy supply to water sustainability.
 

THE BIG QUESTION...

as we head into 2020 is whether politics and media will be a billionaires’ game, or a playing field where the rest of us have a shot. That's what Mother Jones CEO Monika Bauerlein tackles in her annual December column—"Billionaires Are Not the Answer"—about the state of journalism and our plans for the year ahead.

We can't afford to let independent reporting depend on the goodwill of the superrich: Please help Mother Jones build an alternative to oligarchy that is funded by and answerable to its readers. Please join us with a tax-deductible, year-end donation so we can keep going after the big stories without fear, favor, or false equivalency.

THE BIG QUESTION...

as we head into 2020 is whether politics and media will be a billionaires’ game, or a playing field where the rest of us have a shot.

Please read our annual column about the state of journalism and Mother Jones' plans for the year ahead, and help us build an alternative to oligarchy by supporting our people-powered journalism with a year-end gift today.

We Recommend

Latest

Sign up for our newsletters

Subscribe and we'll send Mother Jones straight to your inbox.

Get our award-winning magazine

Save big on a full year of investigations, ideas, and insights.

Subscribe

Support our journalism

Help Mother Jones' reporters dig deep with a tax-deductible donation.

Donate

We have a new comment system! We are now using Coral, from Vox Media, for comments on all new articles. We'd love your feedback.