Go for H²O!

A good water filter is the best and maybe the only solution nowadays.
Just make sure the filter you choose removes the most spectrum of contaminants. Usually a professional filtration system worth investing in is a 5 to 7 stage water purifier system. Each stage will remove certain types of contaminants, and all stages combined should protect you from just about every contaminant. A reverse osmosis water filter with activated carbon pre-filters are what we believe to be the most thorough and cost effective way to purify drinking water.

Such a system will pay for itself within half a year and can last 10-15 years with easy annual filter changes.
Reverse osmosis is an excellent choice for almost all home water purification needs. Reverse osmosis can be very effective in removing bacteria and viruses. It is the most recommended solution for individuals on a pre-treated municipal water system.