world in the year 2014. Industrial water pollution is also of significant concern in portions of Ludhiana, notably along the Budha Dariya. Rivers and drains The Sutlej and its tributary, the Buddha Nala, constitute the chief hydrographic features of the district. A brief description of these is as follows. Sutlej River originates from Lake Manasarovar in Tibet. After flowing through Himachal Pradesh, it debouches from the Shivaliks. Just about Rupnagar, 32 km east of the boundary of Samrala Tehsil, it flows due west along the top of the district for 96 km and turns, as it leaves Jagraon Tehsil, slightly north toward its junction with the Beas at Harike. It maintains an east-west direction. It can be devastating during floods. The Sutlej has experienced a westward drift during recent times. Old towns and villages, such as Bahlulpur, Machhiwara, and Kum Kalan, were built on its banks. The river has since been dammed at Bhakhra, which has considerably checked its flooding menace in the district. Buddha Nala It runs parallel to the Satluj on its south for a fairly large section of its course in the district and ultimately joins the Satluj at Gorsian Kadar Baksh in the northwestern corner of the district. It floods during the rainy season, but in the dry season, it can be crossed on foot at certain points. Ludhiana and Machhiwara are to the south of the Buddha Nala. The water of the stream is polluted after it enters Ludhiana City. Demographics According to the 2011 census, Ludhiana district has a population of 3,498,739 roughly equal to the nation of Panama or the US state of Connecticut. Ludhiana district has a total of 2,560,225 literates which constitutes 73.5% of the population, of which male literary is 76.5% and female literacy is 69.4%. The effective literacy of 7+ population of Ludhiana district is 82.20%, of which male is 86% and female literacy is 77.9%. The sex ratio of 873 females for every 1,000 males. The total Scheduled Caste population is 923,358 (26.39%). There were 716826 households in the district in 2011. The number of workers in the district is 1285,000, which means a work participation rate of 36.7%. Out of the total workforce of the district, 18.7% are engaged in the agriculture sector, 5.6% are working in the household industry, and the rest are employed in other sectors/industries. Religion Language At the time of the 2011 census