Water Purification Methods
Boiling: It is recommended that one reaches a rolling boil for at least one minute.
Water Distillation catches the condensation produced from boiling water, removing minerals and contaminants in the process.
Reverse Osmosis Filtration System forces water molecules through a semi-permeable membrane, leaving organic contaminants, toxins, bacteria, salts, etc. behind.
Carbon filtering uses Activated Charcoal Water Filter used to remove chlorine, sediment, volatile organic compounds (VOCs), viruses, bacteria, and taste and odor from water.
Ultraviolet Light Filters kill mold, bacterial and viral contaminants, including giardia and cryptosporidium, by passing water through an ultraviolet light source.
Multiple Level Filtration System – Ceramic Water Filters are among the stages used in these systems that address contaminants in various stages.
Purification tablets or drops
Pump Purifiers and Gravity Fed Purifiers
Tata Swach – uses filters made from rice husk ash impregnated with nano silver particles to purify water
Enviroalternatives.com: 25 Water Purification Methods
Instructables.com: How to Purify Your Water
‘Cycloclean Purifies Drinking Water Using Bicycle Pedal Power’
Life Sack Solves Drinking Water Issues for the Third World
Wikipedia: Solar Water Disinfection

RARE – Columbia Water Program
Purifics: Water Purification Solutions Canada
Water Mission: Thirst Water Program
Sawyer.com: Video on Water Filtration