Let’s make all the water in our building bottled quality!
A worthy goal, but in reality, there are some limitations in play:
Water that is “bottled quality” must be, of course, free of chlorine and chlorine byproducts. Chlorine is used by municipalities to provide a disinfection residual in potable water. Chlorine and disinfection byproducts (Trihalomethanes) are part of the spectrum of water quality factors resolved by activated carbon media.
Homeowners may choose to remove chlorine at the main of their own private property. It’s their building, and for their own use. But an owner cannot modify the municipally applied disinfection agent at the main, an action that has impact on the general public or those who rent or own property within the building. This can legally only be done by a certified water treatment plant.
Point-of-entry screen filtration removes particles only. Screen technology – even ultrafiltration -- does not affect chlorine levels.
The correct way to assure bottled-quality water via filtration for potable purposes to occupants of a building is by a two-stage approach: (1) Particle filtration at the main (point-of-entry), (2) downstream full-spectrum filtration at any dispensing outlet -- the kitchen sink, water cooler, etc. (point-of-use). The key is to provide comprehensive, bottled-quality filtration at the point water is consumed, not more than a few seconds in advance.
If the goal is to provide chlorine-THM-free water for showers, that's also achievable. Per the above principles, the solution requires individual filtration units, generally separate for the hot and cold water lines that will supply filtered water just before it is dispensed. Please contact us for more information about these solutions.
This is the underlying protocol for the US Green Building Council’s credit, IWBI, and our own filteredISbetter program. We look forward to assisting you further with designing solutions to achieve your water quality goals.