According to WaterAid India, approximately 76 million people in the country lack access to clean drinking water and more than 60,000 children, especially under the age of 5 years, die each year from poor sanitation and diarrheal diseases caused by drinking contaminated water. Causes of water contamination also vary. High population density, chemical farming, overuse of fertilizers, the presence of minerals in the coastal beds, and run-off from factory waste provide limited access to clean drinking water. Other obstacles are distance and cost. Many villagers have to walk several kilometers to access clean water and in some villages, residents are forced to spend money to buy clean water.