Surveys on Water Supply and Sewerage Water supply and sewerage Destination of treated waste water by Autonomous Communities and Cities, source type and period. Units: percentage ,2020,2018,2016,2014,2013,2012,2011,2010,2009,2008,2007,2006,2005,2004,2003,2002,2001,2000, National Total, To the sea,27.5,33.2,33.5,32.0,31.5,..,..,..,..,..,..,..,..,..,..,..,..,.., To a watercourse,61.2,55.4,55.8,57.0,57.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Reused water,10.9,11.2,10.4,10.7,10.6,..,..,..,..,..,..,..,..,..,..,..,..,.., Soil infiltrations,0.3,0.2,0.2,0.2,0.4,..,..,..,..,..,..,..,..,..,..,..,..,.., Others,0.1,0.0,0.1,0.1,0.5,..,..,..,..,..,..,..,..,..,..,..,..,.., 01 Andalucía, To the sea,35.4,35.0,36.1,35.7,35.3,..,..,..,..,..,..,..,..,..,..,..,..,.., To a watercourse,59.4,60.2,58.0,56.5,54.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Reused water,5.2,4.8,5.9,7.8,8.3,..,..,..,..,..,..,..,..,..,..,..,..,.., Soil infiltrations,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Others,0.0,0.0,0.0,0.0,2.4,..,..,..,..,..,..,..,..,..,..,..,..,.., 02 Aragón, To the sea,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., To a watercourse,98.1,92.2,99.2,98.8,99.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Reused water,1.9,7.8,0.8,0.8,0.8,..,..,..,..,..,..,..,..,..,..,..,..,.., Soil infiltrations,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Others,0.0,0.0,0.0,0.4,0.2,..,..,..,..,..,..,..,..,..,..,..,..,.., 03 Asturias, Principado de, To the sea,42.0,22.8,21.7,25.0,36.2,..,..,..,..,..,..,..,..,..,..,..,..,.., To a watercourse,52.1,70.5,74.5,68.0,63.8,..,..,..,..,..,..,..,..,..,..,..,..,.., Reused water,5.9,6.7,3.8,6.9,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Soil infiltrations,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Others,0.0,0.0,0.0,0.1,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., 04 Balears, Illes, To the sea,37.2,61.8,59.6,40.8,39.7,..,..,..,..,..,..,..,..,..,..,..,..,.., To a watercourse,14.0,4.2,7.3,10.2,8.1,..,..,..,..,..,..,..,..,..,..,..,..,.., Reused water,45.4,34.0,33.0,45.5,48.2,..,..,..,..,..,..,..,..,..,..,..,..,.., Soil infiltrations,3.4,0.0,0.0,3.2,3.6,..,..,..,..,..,..,..,..,..,..,..,..,.., Others,0.0,0.0,0.1,0.3,0.4,..,..,..,..,..,..,..,..,..,..,..,..,.., 05 Canarias, To the sea,75.4,71.6,72.7,79.3,78.4,..,..,..,..,..,..,..,..,..,..,..,..,.., To a watercourse,0.9,6.5,7.3,0.6,0.5,..,..,..,..,..,..,..,..,..,..,..,..,.., Reused water,23.7,21.8,19.9,19.9,21.1,..,..,..,..,..,..,..,..,..,..,..,..,.., Soil infiltrations,0.0,0.0,0.0,0.2,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Others,0.0,0.1,0.1,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., 06 Cantabria, To the sea,81.2,75.7,79.5,80.2,81.6,..,..,..,..,..,..,..,..,..,..,..,..,.., To a watercourse,17.1,23.2,18.8,17.8,16.4,..,..,..,..,..,..,..,..,..,..,..,..,.., Reused water,1.7,1.1,1.7,2.0,2.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Soil infiltrations,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Others,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., 07 Castilla y León, To the sea,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., To a watercourse,99.0,98.0,99.1,99.0,98.7,..,..,..,..,..,..,..,..,..,..,..,..,.., Reused water,1.0,2.0,0.9,1.0,1.3,..,..,..,..,..,..,..,..,..,..,..,..,.., Soil infiltrations,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Others,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., 08 Castilla - La Mancha, To the sea,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., To a watercourse,96.8,98.0,96.2,96.7,93.2,..,..,..,..,..,..,..,..,..,..,..,..,.., Reused water,2.8,1.9,3.8,2.9,3.5,..,..,..,..,..,..,..,..,..,..,..,..,.., Soil infiltrations,0.4,0.1,0.0,0.4,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Others,0.0,0.0,0.0,0.0,3.3,..,..,..,..,..,..,..,..,..,..,..,..,.., 09 Cataluña, To the sea,45.5,72.2,66.3,56.1,54.9,..,..,..,..,..,..,..,..,..,..,..,..,.., To a watercourse,49.1,23.2,28.7,39.8,40.3,..,..,..,..,..,..,..,..,..,..,..,..,.., Reused water,5.4,4.5,4.9,4.0,4.7,..,..,..,..,..,..,..,..,..,..,..,..,.., Soil infiltrations,0.0,0.1,0.1,0.1,0.1,..,..,..,..,..,..,..,..,..,..,..,..,.., Others,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., 10 Comunitat Valenciana, To the sea,24.4,23.0,16.5,21.9,26.1,..,..,..,..,..,..,..,..,..,..,..,..,.., To a watercourse,33.1,32.5,33.6,17.4,17.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Reused water,42.5,42.7,47.5,59.4,54.8,..,..,..,..,..,..,..,..,..,..,..,..,.., Soil infiltrations,0.0,1.8,2.4,1.3,2.1,..,..,..,..,..,..,..,..,..,..,..,..,.., Others,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., 11 Extremadura, To the sea,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., To a watercourse,100.0,100.0,100.0,100.0,100.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Reused water,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Soil infiltrations,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Others,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., 12 Galicia, To the sea,29.9,22.3,30.5,45.5,42.7,..,..,..,..,..,..,..,..,..,..,..,..,.., To a watercourse,58.4,59.5,60.7,54.4,57.3,..,..,..,..,..,..,..,..,..,..,..,..,.., Reused water,8.6,18.2,8.8,0.1,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Soil infiltrations,3.1,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Others,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., 13 Madrid, Comunidad de, To the sea,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., To a watercourse,97.4,97.7,97.7,97.6,97.8,..,..,..,..,..,..,..,..,..,..,..,..,.., Reused water,2.6,2.3,2.3,2.4,1.7,..,..,..,..,..,..,..,..,..,..,..,..,.., Soil infiltrations,0.0,0.0,0.0,0.0,0.5,..,..,..,..,..,..,..,..,..,..,..,..,.., Others,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., 14 Murcia, Región de, To the sea,2.1,1.5,11.5,10.4,5.0,..,..,..,..,..,..,..,..,..,..,..,..,.., To a watercourse,6.5,2.9,16.7,35.7,33.2,..,..,..,..,..,..,..,..,..,..,..,..,.., Reused water,91.4,95.6,71.8,50.3,61.7,..,..,..,..,..,..,..,..,..,..,..,..,.., Soil infiltrations,0.0,0.0,0.0,0.2,0.1,..,..,..,..,..,..,..,..,..,..,..,..,.., Others,0.0,0.0,0.0,3.4,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., 15 Navarra, Comunidad Foral de, To the sea,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., To a watercourse,99.8,100.0,100.0,100.0,100.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Reused water,0.1,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Soil infiltrations,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Others,0.1,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., 16 País Vasco, To the sea,65.7,65.6,67.7,58.9,57.0,..,..,..,..,..,..,..,..,..,..,..,..,.., To a watercourse,33.4,33.2,31.4,39.5,41.7,..,..,..,..,..,..,..,..,..,..,..,..,.., Reused water,0.9,1.2,0.9,1.6,1.3,..,..,..,..,..,..,..,..,..,..,..,..,.., Soil infiltrations,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Others,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., 17 Rioja, La, To the sea,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., To a watercourse,100.0,100.0,100.0,100.0,100.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Reused water,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Soil infiltrations,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Others,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Ceuta and Melilla, To the sea,100.0,99.9,100.0,99.0,99.0,..,..,..,..,..,..,..,..,..,..,..,..,.., To a watercourse,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Reused water,0.0,1.0,0.0,1.0,1.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Soil infiltrations,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Others,0.0,0.0,0.0,0.0,0.0,..,..,..,..,..,..,..,..,..,..,..,..,.., Notes: Source: National Statistics Institute