Your tap water could taste unpleasant and be less than healthy for your staff.

The average person loses more than 3 litres of water a day through exhalation (lungs), perspiration (skin), and body waste (kidneys and bowel). So our body is in constant need of at least 2 litres, or 8 glasses, of pure water, a day just to enable these four organs to function properly and maintain optimum health.
In fact, athletes, nursing mothers and people involved in physical activity, special diets or weight loss programs should drink more than the recommended 8 glasses of pure water.
Tea, coffee, alcohol and cordials all dehydrate us more, so we need to drink more pure water to compensate if we want our body to function effectively.
It is a fact we consider using fresh filtered water only for drinking, but there are many other beneficial uses for filtered water in our daily lives, including...
Cooking
For hot drinks (Tea, coffee, etc)
Ice Cubes
Home Brew
Pets’ water
In Fish Tanks
Indoor plants & flowers
Filling the Iron