I used to live in a town where the tap water smelled like dead fish for a couple of months out of the year. Got a distiller and was amazed at the smelly paste I was no longer drinking.
I've had the same problem. Got this distiller and this TDS meter.
Using the TDS meter, I also found that a drug store house brand purified water that said it was municipal water "purified by reverse osmosis and/or steam distillation" had negligible dissolved solids. So water like that might be an alternative.
Even though I'm German I'm not a fan of apfelwein, To dry for me but the wife and her friends love it. Five gallons last about a month. I also do brandy, I use Water Distiller and learned how to do it from Systm - Episode 51