<prompt> Problem village include all EXCEPT:Where no water source in a distance of 1.6 km from communityWater is available at a depth of more than 15 metresThere is excess of Na, iron fluoride saltRisk of Guinea worm infection  <response>: - A problem village has been defined as one where No source of safe water is available within a distance of 1.6 km, or where water is available at a depth of more than 15 metres, or where water source has excess salinity, iron, fluorides and other toxic elements, or where water is exposed to the risk of cholera. 