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Water Purification or Water Filtration

It is common to see the terms ‘Water Filtration’ and ‘Water Purification’ used interchangeably. The truth is that they really are two separate, but closly related things.

Each has a role to play in providing your family with healthy and tasty water for your family, and each is available in a variety of forms.

Put simply, a filter removes particulates and other impurities from your families home water supply. It does so by trapping these particles in the filter cartridge using varies media such as carbon blocks, Ultrafiltration membranes, GAC or KDF.  A water filter also gets rid of protozoa and parasites, even bacteria, but it does not remove viruses.

Water purification systems, on the other hand, use a filtering process that removes impurities and adds the extra step of disinfecting the water by eliminating viruses. In fact, the Environmental Protection Agency (EPA) has set standards that require water purifiication systems to eliminate 99.9% of all viruses.

In general,  if your families water supply comes from a municipal water supply you really only need a water filtration system to remove the chlorine and other impurities that may be present in the water.

If your families water supply depends on a well, a stream, lake, or maybe comes from rainwater harvesting should consider one of the many effective water purification systems.

How can I Disinfect my Families Water Supply?

Disinfection is accomplished both by filtering out harmful microbes and adding disinfectant chemicals or using other methods in the last step in purifying drinking water.

  • Chlorination - The most common disinfection method. Although chlorine is effective in killing bacteria and viruses, it has limited effectiveness against protozoa that form cysts in water such as Giardia lamblia and Cryptosporidium which are both pathogenic.
  • Ozonation - uses an unstable molecule, a "free radical" of oxygen which readily gives up one atom of oxygen providing a powerful oxidising agent which is toxic to most waterborne organisms.
  • UV radiation (light) - is very effective at inactivating cysts, as long as the water has a low level of color so the UV can pass through without being absorbed.
  • Boiling - Water is boiled long enough to inactivate or kill micro-organisms that normally live in water at room temperature. Near sea level, a vigorous rolling boil for at least one minute is sufficient.
  • Distillation - involves boiling the water to produce water vapour. The vapour contacts a cool surface where it condenses as a liquid. This condensed water is 99.9% pure water.

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