Shieepies,
Welcome to Simply Discus. The first thing that I would suggest is to take a close look at your well. You might be getting water draining in from the surface. If so, change the grading around it and provide a slope for water to drain away from the well head. I would also get the water tested to determine if there are contaminates in it that would make it unhealthy to drink, especially since you have some concern that it may "spoil" with aging.
Paul