I don’t know if there is “new” water on this planet, but there is definitely “recent” water as compared with old or ancient water. Current surface water or moisture in the soil evaporates into water vapor, and actually volcanoes release new water vapor, the water vapor coalesces into rain or snow and falls on earth or ocean. Or it melts and flows from earth surface into streams and rivers and flows to lakes and oceans. There we now have new water. Of course there is also the new water that sinks into the earth and becomes part of the water table where it mixes with older water or eventually flows into streams and rivers by which time it is also older water. Thus your well water may be well aged. So enjoy!
If I ever start selling this as bottled water, I’ll remember to put a really old date on it (well is down into the Marshall sandstone).
Same old carbon and oxygen from long ago.