Here we have 3 options for gallon+ jugs (probably more but 3 interested me) Distilled, Spring and Drinking. Spring is untreated, but filtered, ground/spring water. Drinking is basically bottled city water. Distilled is just that, water that has gone through the distillation process. I have never heard or noticed a flavor or odor of chlorine (not saying it's not available somewhere, I just haven't experienced it). I have used all three for different applications successfully. Spring was used for brew day before I added filtration. Drinking was used for campsites where available water sources were questionable. Distilled is for Starsan, Refractometer calibration and added to the iron for steaming clothes. All are the same price, $0.99 per gallon. I make Starsan in 19 liter batches about once every 10 months so it really doesn't break the bank.