Water quality and coffee machines

As I service machines for customers I'm noticing the quality of water declining. Probably as a result of the drought and increased chemical load in the water supply. Particularly in the older inner areas of Melbourne I'm seeing copper stain in water tanks. My recommendation is to buy a Brita filter jug and filter your tap water. They cost approx $25 for jug and $12 for filter. If the investment keeps your machine free of nasties it can only save you money over time.