My water is well water as well, and when I use it to fill regular bowls it leaves behind some nasty brown stains. I will not use that without some filtration devise filtering the water first. I live next to farm land and no telling what chemicals get into the water, plus the stream the water comes from runs right though a cow pastier. So NO way would I use it straight up! My wife bought me this for Christmas!
Amazon.com: Coralife 05692 Pure-Flo II 50-Gallon Per Day 4 Stage RO/DI System: Pet Supplies
I already saw a major difference in terms of quality of my water, plus no brown stains on anything I put it in. I might have to replace the filters a little more often than normal, but it's still worth having it at my home so I don't have to drag 5 gallon buckets to the super market for their RODI water.
Here is a picture of my setup! This is coming right from the hose attachment in the sub-basement that the water flows directly from the well. Water is good for a long time! So you don't need to worry about filling up a trashcan and not using the water quickly.