Hello everyone, currently my city is running off of a blend of well water and small ugly reservoir water. As such my tap water now has a TDS of 125 and a conductivity of around 275 uS/cm. For the past 2 months I have been using the ever abundant rain water California has been getting but I am about to run out. Because I'm usually spoiled with awesome cold pure delicious snow melt fancy water with a TDS of around 30 and a conductivity of 50 uS/cm, I am now being forced to use my pure water fertilizer with water that to me is (terrible tasting) liquid rocks (I even get water spots on my shower walls now! Can you believe this injustice??

) This begs the question, at what threshold does water stop being pure, to me that threshold is 100 TDS or about 175 uS/cm but I would like to know what other peoples threshold is. I use MSU RO mix if that helps.