My parents had a well that was supplied by a artesian aquifer that runs across Illinois. Wonderful water. It tasted like spring water. It was great until A)a flash flood hit one summer day submerging the well vent and contaminating the well with field chemicals and horse poop from my corral resulting in the well having to be sanitized before we could use the water again. Bad enough for humans but a real PITA when you are having to haul water from town for two water guzzling hay burners. b) shortly after that, I started getting a shock off the metal in the house. Got worse until one day I went to turn on a water faucet outside and almost got knocked on my keester by the shock I got. Turned out that pumping the well dry twice had rubbed the insulation off of the pump shorting it out. Lucky I wasn't electrocuted c) the pressure tank developed a leak. Something like 5,000 dollars later we were back in business. Re-venting the well, replacing the pump and pressure tank. OH! Forgot, then the line from the well to the house sprang a leak. Nothing like waking up to a mini geyser in your back yard.
I learned to love city water, nasty tasting as it is at times. Our rural water here isn't bad flavor wise but back in IL, where DH and I lived the water was terrible in town. Couldn't stand to drink it and at home it had so many minerals in it I would get calcium build up on my teeth that you could scale off with your fingernail. It really made me miss that artesian water.
As for the knees, mine only bother me when my back is acting up then it's like I'm the Tin Man in the Wizard of Oz. Dr says it's sacroiliitis....I say it's a pain in the ....ummmm backside. Every time I go in he asks me about it and keeps threatening me with doing a sonogram guided injection into the joint. So I just suck it up, smile sweetly and say 'Fine, everything's fine...no pain at all in the SI joint'....somehow I don't think he believes me.