The fiery derailment of a train in East Palestine has prompted concern that the drinking water some five million people rely on could be impacted.
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How many people get their water from the Ohio River?
Utilities along the Ohio River are actively monitoring their water supplies.
The 981-mile long Ohio River, which flows through and borders six states, is the source of drinking water for more than five million people, according to the
Ohio River Foundation.
More than 25 million people, almost 10% of the US population, live in the Ohio River Basin.
Cincinnati's water utility, for example, is
collecting samples of the Ohio River and analyzing them for any "potential threat."
Louisville and Evansville, Indiana, are also monitoring their intake from the Ohio River.
Kurt Rhoads, an engineering professor at Case Western Reserve University, said surface water contamination will likely only be a problem for a short period of time. But any
effects on groundwater will unfold over a longer term, Rhoads said, and could present a problem for East Palestine residents with private wells.
Other parts of Ohio could also feel the consequences of groundwater contamination.
"We've put a lot of effort and money into making certain this infrastructure works. Now, people who are not on municipal supplies, they have their own wells, etc. and they're nearby, that's something different altogether," said David Stradling, director of Environmental Studies at the University of Cincinnati.
Some of the water in East Palestine eventually makes its way into the Great Miami River in southwest Ohio, Stradling said. Lying underneath the river is a massive aquifer, appropriately named the
Great Miami Buried Valley Aquifer. The aquifer is the sole source of drinking water for the city of Dayton, according to the city's website. Cincinnati also draws from it.
Stradling said authorities must monitor the aquifer for chemicals from the derailment site.
"It's not extraordinarily deep. There would be pretty good interchange between surface water and aquifer," he said.