. It is one of the nine districts (atolls) of Tuvalu, and one of the three who consist of only one island, not counting the three islets inside the closed lagoon. It has a population (2002 census) of 663. Geography There are two lakes (ponds or lagoons), which are brackish to saline. The larger has three islands and a dam. There are three wells from which fresher water sits in a "lens" abouve the salt water that leeched in through the coral. Older maps show only village is Tuapa (with the neighb… (More on Niutao)