Indian Point nuclear power plant, 35 miles north of New York City. image: aaea
The water cools the steam used in the electric generating process. And all the fish and aquatic organisms in the water are killed in the process.
In modern plants, little or no water is needed. Instead, the cooling is done with air, or sometimes with a different water system that uses small amounts of water and recycles it. The question in this case involves whether older plants must install new technology to minimize the harm to the nation's lakes and rivers."