I don't think those filters will handle bacteria.

Hi Mike,

 On our boat we filter the water going into the tanks and the water from the shore supply while we are docked.  We use an inline water filter attached to our shore water hose.  We also use a Zero Water Filter for the water we drink or use to make coffee or tea.

Of course, clean tanks that have been sanitized before hand is also important.

That's my 2 cents.

We are full-time cruisers and do drink/cook with the water from our tanks.  Specifically, we bleach the water in the tanks, and also have a house style filter on the galley cold water tap. It is fitted in the hold just forward of the sink. The filter gets out  6 or 7 different things, including the bleach. So, we are careful to only drink/cook with water from the galley cold tap, but use the other taps for washing, etc. 3 years in and no illness ever. 

I guess it depends on the water source.  I shock my system with bleach twice a year and the rest of the time use city/Marina water supply to fill my tanks.  If I am going to be gone for a week or two and not use the water then I will add a the appropriate amount of bleach before I leave the boat.  In 30 years of boat ownership I have never had an issue.  Is your concern your holding tanks or the water you are putting in? 
JEB

Coincidentally "Practical Sailor" sent an email out today as to the availability of their recommendations for onboard water treatment and storage.They have some in depth info on filtration performance, treatment products etc. It's available from their website for $29..90 for the full study or $14.95 for just the filtration info. Probably worth it if your into  cruising.

We rely on annual tank flushing and a little bleach throughout the season but use our boat water just for washing and flushing and bottled water for drinking. We are mostly day sailors on a mooring.

I think much of the drinking water dilemma depends on where you live and how you use your boat. Hot weather, tropics vs cold weather. In Mexico we were constantly on the alert for water issues. But Jubilee resides in San Francisco Bay where water temp rarely gets above mid-fifties. In 40+ years of owning boats here, I've never had a problem with water right from the marina supply. I do use the boat extensively, so the water supply is being circulated regularly.  

I have installed a Forespar Purewater filter/spigot in the galley. It was super easy to install, very easy to change filters (choice of 5 or .5 microns), and takes any "hose" taste out of the water, along with other stuff. Saves lugging full water bottles to the boat and empty ones away from it. Landlubber crew also are less squeamish about drinking the boat's supply knowing there is a filter there .