Originally published April 5, 2013. Rewritten with current data on September 25, 2026.
A typical horizontal shale gas well uses a median of about 5.1 million gallons of water to frack, according to the US Geological Survey’s first national study of the practice, and individual wells range from 2,600 gallons to 9.7 million. Water use per well has climbed since then, because wells have gotten longer and each foot of well now takes more water. Nobody publishes a current national total, so fracking’s exact share of US water use isn’t known. In the Permian Basin, the bigger water issue is now what comes back out. Wells there bring up more than 20 million barrels of water a day.
How much water one fracked well uses
The USGS study covered wells fracked from 2000 to 2014, and volumes rose throughout. A horizontal oil well used a median of about 177,000 gallons in 2000. By 2014 the median had passed 4 million gallons, more than twenty times the 2000 figure. Horizontal gas wells reached the 5.1 million gallon median by the end of the study.
The climb kept going after 2014. A 2018 study in Science Advances by Kondash, Lauer and Vengosh found that in the Permian Basin, water use per foot of horizontal well rose from 350 gallons to 2,335 gallons between 2011 and 2016, more than a sixfold increase. Operators were drilling longer wells and pumping more water into every foot of them at the same time. To put the per-foot numbers in terms of a single well, take a hypothetical well with a two-mile horizontal section, about 10,560 feet. At the 2011 Permian rate it would have used about 3.7 million gallons. At the 2016 rate it would use about 25 million. Across the Permian, total freshwater use for fracking rose about 770% over those five years.
The Marcellus shale in Appalachia went a different way. Total water use there stayed roughly flat over the same period, because fewer new wells were drilled each year even as each one used more. A region’s total can hold steady while the per-well figure keeps rising.
How fracking compares with other US water use
The United States withdrew about 322 billion gallons of water a day in 2015, the latest full national accounting from USGS.
| Use category | Billion gallons a day (2015) |
|---|---|
| Thermoelectric power | 133 |
| Irrigation | 118 |
| Public supply (homes and businesses) | 39.0 |
| Industrial | 14.8 |
| Mining | 4.0 |
Source: USGS, Total Water Use in the United States
Power plants and irrigation together account for about 78% of the total, and thermoelectric plants alone withdrew more than thirty times as much as mining, which drew 4 billion gallons a day, about 1% of all withdrawals.
Fracking doesn’t appear as its own line in that accounting, and no federal agency publishes a current national total for the water it uses. Any national percentage you see for fracking is an estimate built from older per-well and well-count figures. The per-well figures come from USGS and peer-reviewed studies, while the national share still rests on older estimates.
Why location matters more than the national total
A small national share can still be a big local one. In 2013, Ceres mapped more than 25,000 oil and gas wells and found that almost half sat in water basins with high or extremely high water stress, as the World Resources Institute reported. The same analysis noted that its maps didn’t account for water moved between basins or for the difference between water withdrawn and water consumed.
The Permian and the Marcellus show why the local picture matters. In the Permian, freshwater use for fracking rose about 770% in five years. In the Marcellus, it stayed flat. One national average can’t describe both.
Five million gallons drawn from a basin with plenty of water is a rounding error. The same volume drawn where farms and towns already rely on a stressed supply is a real claim on that supply, whatever the national percentage says.
The water that comes back up
Every fracked well also returns water to the surface for as long as it produces, a mix of fracturing fluid flowing back and water that was already in the rock. The industry calls it produced water. In the Permian Basin it runs past 20 million barrels a day, against oil production of a bit over 6 million barrels a day. That’s more than three barrels of water for every barrel of oil, and the Society of Petroleum Engineers’ journal expects Permian produced water to pass 26 million barrels a day by 2030. The same journal calls water management the Permian Basin’s biggest challenge.
Some of that water is treated and reused on the next well. The rest is trucked or piped to disposal wells and injected deep underground.
The Environmental Protection Agency’s 2016 assessment of fracking and drinking water looked at the whole water cycle, from acquiring the water through disposal, which is a fair way to think about fracking’s water footprint. The water a well takes in is only the first stage of it.
Disposal, earthquakes and the cost of recycling
The cost of handling produced water depends on the method. Trucking it to a disposal site can cost up to $2.50 a barrel, while recycling it for another well runs about 15 to 20 cents. Piping it straight into a disposal well falls in between, at 25 cents to $1.00 a barrel.
Disposal wells carry a risk beyond cost. Injecting large volumes of produced water underground has been linked to earthquakes in parts of Texas and Oklahoma, and regulators have restricted injection volumes in parts of the Permian as a result.
When people first asked how much water fracking uses, the worry was fresh water going into wells. In the Permian today, at least as much attention goes to the water coming out.
What could change these numbers
Recycling is the cheapest way to handle produced water in the Permian, at 15 to 20 cents a barrel against up to $2.50 for trucked disposal. Every barrel reused on the next well is a barrel of fresh water that well doesn’t need, so more recycling would pull per-well freshwater use down.
Produced water is heading the other way, toward 26 million barrels a day in the Permian by 2030. If limits on disposal wells keep tightening at the same time, recycling becomes the main place for that water to go. Produced-water volumes and disposal-well permits are the figures to follow if you want to know where fracking’s water footprint goes next.
