Water Passes Through A Chamber Which Keeps A Large Ultraviolet Light Source And Kills Any Genetic Material (Bacteria, Parasites, Viruses) And Collects Its Remains And Removes Them From The Water
When Water Is Boiled It Can Kill Bacteria, Viruses, And Parasites That Are Inside The Water, Many People Boil Water To About 5 Minutes Or More To Get Rid Of All The Contaminants, The Downside Of This Is Inconvenience (Hiking, Camping, Anywhere That Doesn't Have Appliances)
The Soil Traps Particles As Water Is Going Down Through The Soil And Soil Micro-Organisms Purify The Water By Breaking Down The Nutrients And Contaminants That Are In The Water
Wetlands Can Remove 60% Of Metals In Water And 90% Of Sediment From Urban And Agriculture Runoff
Wetlands Filter Water By Slowing Its Flow, The Particles Drop Into The Sediment Layer In The Wetland, Over Time They'll Be Sequestered As Other Layers Form On Top Of It