While many microorganisms are neutralized during water treatment. Some do get through, and others can appear in the water supply while it is being piped to your home.
There are various strains of bacteria that will do very little, if anything to you.
There are others which can cause huge issues though.
Luanne K. Williams, Pharm.D., Toxicologist of North Carolina Department of Health and Human Services states in an article she wrote about bacteria in the water supply:
In addition to this mentioning how:
Thus linking back to earlier stated issues with hydrogen sulfide in your water, and potential sources of it.
Bacteria can grow and multiply at alarming rates.
With little, or even zero warning.
Usually, by the time a health authority becomes aware of these kinds of issues. And puts out a boil-water advisory. The problem has already reached a level that you would have preferred to totally avoid.
Naturally you could boil all of your water before use.
Though drinking cold, previously boiled water, is far from pleasant. And boiling water to wash salads and other healthy foods with, is wasteful and time consuming.
Especially considering that the use of a whole house water filter, with the right filter components.
Can filter out all the bacteria and viruses that can trigger a boil-water advisory.
Thus even if there is a boil-water advisory, you can still be safe drinking cold water straight from the faucet. Because it is clean pure water, filtered for the unpleasant dangerous contaminants, bacteria and viruses.
Safe, clean, pure water.
Every time you want it. From every faucet in your entire home.
Just from having an AquaOx whole house filter + AquaOx DF combination.