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