The water use by steam turbine power plants is substantial- a non-issue for some locations, but sometimes a serious issue in desert areas, where you might like to locate solar heliostat/molten salt plants. No different than for a coal plant. There are ways to reduce water use dramatically but it is always an issue for everything except pure PV.
The 773 Megawatt Coronado coal fired plant near me in St. Johns, AZ (completed in 1980) had quite a debacle when they found the local ground water of such poor quality (highly mineralized, full of radon, and corrosive) they couldn't use it. They have pumping stations and pipes that extend 30 miles to suck ground water from elsewhere, including 1/2 mile from my home. It is solely owned by Salt River Project and I can't find water use data- a sore subject as our aquifer is also being used faster than it's replacement.
Palo Verde (3.3 Gigawatts) is the largest nuclear plant in the US. It operates on treated Phoenix "waste water", which is no small feat. Every other plant in the world is near a river or large body of water. It uses 20 billion gallons per year, which accounts for 25% of the "overdraft" on groundwater in the Phoenix area. The overuse of ground water grossly in excess of it's natural replacement is a very serious issue in the southwest. It's one of those "screw the grandkids" kind of situations.
The future of the SW US will largely be dependent on water, and the piper will have to be paid. It makes water use an important consideration in planning for future power generation. It's a real issue here in the SW, not greenwashed foolishness.