Madurese people operate with significantly larger figures around 10.5 to 10.8 million people. In any case, the Madurese people are among the largest ethnics of Indonesia, thus, according to the statistics of the 2010 census, they occupy the fourth largest ethnic group after the Javanese people, Sundanese people and Batak people. Historically, the Madurese people inhabit Madura Island and located to the east of it, a group of smaller islands in Java Sea such as Kambing Island, Sapudi Islands and Kangean Islands. Here they number about 3.3 million people, which is more than 90% of the population in these territories. Approximately the
Water supply and sanitation in Indonesia Water supply and sanitation in Indonesia Water supply and sanitation in Indonesia is characterized by poor levels of access and service quality. Over 40 million people lack access to an improved water source and more than 110 million of the country’s 240 million population has no access to improved sanitation. Only about 2% of people have access to sewerage in urban areas; this is one of the lowest in the world among middle-income countries. Water pollution is widespread on Bali and Java. Women in Jakarta report spending US$11 per month on boiling water, implying a significant burden for the poor.