Surakarta (Javanese: ꦯꦸꦫꦏꦂꦠ), known colloquially as Solo, is a city in Central Java, Indonesia. The 46 km2 (16. 2 sq mi) city adjoins Karanganyar Regency and Boyolali Regency to the north, Karanganyar Regency and Sukoharjo Regency to the east and west, and Sukoharjo Regency to the south.
On the eastern side of Solo lies Solo River (Bengawan Solo). Its built-up (or metro) area made of Surakarta Municipality and 59 districts spread on 7 regencies was home to 3,649,254 inhabitants as of 2010 census. Surakarta is the birthplace of the current President of Indonesia, Joko Widodo. He served as Mayor of Surakarta from 2005 to 2012. The water sources for Surakarta are in the valley of Merapi, a total of 19 locations, with a capacity of 3,404 l/second (899. 2 U. S. gal/sec). The average source water height is 800–1,200 m (2624. 7 ft to 3937 ft) above sea level. In 1890–1927 there were only 12 wells in Surakarta. Today, underground water wells in 23 locations produce about 45 l/second (11. 9 U. S. gal/sec). In March 2006, Surakarta's state water company (PDAM) had a production capacity of 865. 02 l/second (228. 5 U. S. gal/sec): from Cokrotulung, Klaten, 27 km (16. 8 mi) from Solo, 387 l/s (102. 2 U. S. gal/sec); and from 26 deep wells, with a total capacity of 478. 02 l/second (126. 3 U. S. gal/sec).