Not sure if this bug was fixed, but I doubt it.
If you get water from a well it does NOT lower the Q of the local spot.
I think more than ever with the emphasis on quality this is very abusable, you can live on hq water with a well and never 'lower' it as intended.
Sarchi is the one who told me about this, but he's too lazy to post it so I'm doing it for him.