Carbon filter

Description

Carbon filters remove larger particles.

Filtration's quality

Process

Drinking water flows through one filter which removes tastes and odors only.

Contaminants eliminated by filtration

Certain chemicals
Sand
Chlorine
Dust
Etc.

Filter's porosity

5-10 microns
(for comparison, an average hair is 50 microns thick)

Ultra filtration

Description

Ultrafiltration removes medium-sized particles and certain chemicals.

Filtration's quality

★ ★

Process

Drinking water flows through 2 filters and a membrane.

Contaminants eliminated by filtration

Certain chemicals
Sand
Chlorine
Dust
Asbestos
Bacteria
Etc.

Filter's porosity

0.01 micron
(for comparison, an average hair is 50 microns thick)

Reverse osmosis

Description

Invented by NASA, the reverse osmosis process filters out everything but H2O molecules.

Filtration's quality

★ ★ ★

Process

Drinking water flows through 3 filters and a semi-permeable membrane to remove everything but H2O molecules.
Specialized filters may be required depending on the water analysis results.

Contaminants eliminated by filtration

Chemicals
Sand
Chlorine
Dust
Asbestos
Magnesium
Bacteria
Viruses
PPCPs
Calcium
Synthetic dyes
Metal ions
Etc.

Filter's porosity

0.0001 micron
(for comparison, an average hair is 50 microns thick)