Bais, officially became a city on September 9, 1968 (R.A. No. 5444). The territorial jurisdiction of Bais includes two islets (Olympia and Dewey) and the Bais Bay. The Bais Bay area holds a diversity of animal life and is a rich breeding and fishing ground for demersal and other fish species, and also invertebrates. South Bais Bay is also famous for dolphin watching. The Pelarta River runs beside the city center. There is, however, a dispute that the name Bais was taken after the eels locally called "bais" that used to thrive in this river. The river has been the source of irrigation water for the nearby sugar farms. This has been vital in the success of sugar plantations in this area. This river also has a big influence on the city's geography, as it deposits sediments in the former mangrove areas during the (formerly annual) flood season. These former mangrove swamps have now dried out and become populated with residents. In the late 1970s, under the Genaro Goñi administration, a river control system stretching from the city center toward the low-lying areas was established in order to lessen flooding during the rainy season. Barangays Bais is politically subdivided into 35 barangays. Climate Demographics Economy Bais is the largest producer of raw sugar in Negros Oriental. There are two sugar mills in the city. The Central Azucarera de Bais was established by Tabacalera of Spain in the early 1918 and is the oldest in the country. The other mill is URSUMCO (Universal Robina Sugar Milling Corporation) which was formerly known as UPSUMCO (United Planters Milling Corporation) and constructed in the mid-1970s by Marubeni Corporation of Japan as a project of Ignacio Montenegro (also of Spanish roots). An ethanol plant of the Universal Robina Corporation (URC) that produces bioethanol for the local market has recently been inaugurated. Culture An annual fiesta is held each year on September 10 in honor of the city's patron saint San Nicolás de Tolentino, a celebration inherited from the Spanish era. On this occasion, most of the residents prepare food for anyone who visits - a tradition practiced not only in Bais but also in most towns and cities in the Philippines. Lately, the celebration has included mardigras and parades. Seventy-three percent of the city's total land area is devoted to agriculture and the local economy is dominated by agricultural activities and output. The existing urban