[header] How to disinfect drinking water in the wilderness [title] Pack the proper water purifying equipment and chemicals. [step] If you're backpacking you should have a high quality pump with a filter, and/or purifying tablets. [title] Immerse the end of the pump where water flows in in the clearest portion of the water source that you can see. 
[step] Deeper areas are preferable since it will be easier to draw out water. [title] Pump until your water container is full.