Chlorinated water can be difficult to drink, and often leads to dry and irritated skin.
Activated carbon filtration is a great way to dramatically improve your municipal water supply.
Rain water collection is classified as an insecure source as it can be contaminated at any time by pollutants from your roof such as coal dust, leaf matter and animal bi-products.
The best way to treat your rain water supply is with a system which includes ultra violet treatment.