Small units on expeditionary missions carry a limited volume of water in hydration packs or in bottles.  Local natural water sources such as rivers, streams, standing water and  infrastructure such as water tanks and wells can easily be  contaminated with chemical or biological hazards. 

“SPRING” is a small, man-portable water purification unit that fits into a backpack and filters water to meet the platoon or squad’s required hydration needs. The system produces fresh, pure water from any indigenous water source (tap water from a captured building, water tanks on roofs, wells, etc.). It is small and light-weight, and reduces the logistical requirement to supply large amounts of water to deployed troops during operations.