Groundwater salinity is a widespread problem around the world with adverse consequences on health, soil quality and overall ecosystems. Lalit Sharma, a civil engineer in India, has found a simple and effective way to create freshwater pockets for potable use within saline aquifers. Lalit has worked in villages in India to develop an innovative technique that creates a pocket of fresh water within a saline aquifer. By digging the recharge well deeper and extending height, the well creates hydrostatic pressure and pierces the saline water even in very shallow aquifers?—?creating a pocket of freshwater. The water is then extracted via a hand pump and run through a Biosand filter to make it safe for use.