Rural West Bengal has the highest levels of naturally occurring arsenic in its water table than anywhere else in the world. Arsenic causes fatal illness and deformities in unborn children, etc. Villagers rely on water drawn from the ground by tube wells which are sometimes broken beyond repair or simply non-existent. Many villagers have to walk miles to collect clean water. Since 2004 Stepping Stones has built 8 deep tube wells, each one providing clean water for up to 500 families.