Could you perhaps buy a small water tank and hook it up to your house or shed roof??? Then you would have beautiful pure rain water. I had just such a tank off my shed roof - 50 gallons and supplied all our drinking water.
Having lived in far north Weipa for years, with its perfect water, when we moved to Bris and town water, our eyes used to water, from the effect of chlorine - just standing at the sink
Hence the water tank.
