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 2022 2020 2018 2016 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 National Total To the sea 27.2 27.5 33.2 33.5 32.0 31.5 .. .. .. .. .. .. .. .. .. .. .. .. .. To a watercourse 46.2 61.2 55.4 55.8 57.0 57.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Reused water 23.6 10.9 11.2 10.4 10.7 10.6 .. .. .. .. .. .. .. .. .. .. .. .. .. Soil infiltrations 0.8 0.3 0.2 0.2 0.2 0.4 .. .. .. .. .. .. .. .. .. .. .. .. .. Others 2.1 0.1 0.0 0.1 0.1 0.5 .. .. .. .. .. .. .. .. .. .. .. .. .. 01 Andalucía To the sea 41.1 35.4 35.0 36.1 35.7 35.3 .. .. .. .. .. .. .. .. .. .. .. .. .. To a watercourse 55.2 59.4 60.2 58.0 56.5 54.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Reused water 3.4 5.2 4.8 5.9 7.8 8.3 .. .. .. .. .. .. .. .. .. .. .. .. .. Soil infiltrations 0.0 0.0 0.0 0.0 0.0 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Others 0.2 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 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. To a watercourse 99.6 98.1 92.2 99.2 98.8 99.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Reused water 0.4 1.9 7.8 0.8 0.8 0.8 .. .. .. .. .. .. .. .. .. .. .. .. .. Soil infiltrations 0.0 0.0 0.0 0.0 0.0 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Others 0.0 0.0 0.0 0.0 0.4 0.2 .. .. .. .. .. .. .. .. .. .. .. .. .. 03 Asturias, Principado de To the sea 77.3 42.0 22.8 21.7 25.0 36.2 .. .. .. .. .. .. .. .. .. .. .. .. .. To a watercourse 22.7 52.1 70.5 74.5 68.0 63.8 .. .. .. .. .. .. .. .. .. .. .. .. .. Reused water 0.0 5.9 6.7 3.8 6.9 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Soil infiltrations 0.0 0.0 0.0 0.0 0.0 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Others 0.0 0.0 0.0 0.0 0.1 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. 04 Balears, Illes To the sea 47.9 37.2 61.8 59.6 40.8 39.7 .. .. .. .. .. .. .. .. .. .. .. .. .. To a watercourse 8.4 14.0 4.2 7.3 10.2 8.1 .. .. .. .. .. .. .. .. .. .. .. .. .. Reused water 42.1 45.4 34.0 33.0 45.5 48.2 .. .. .. .. .. .. .. .. .. .. .. .. .. Soil infiltrations 0.0 3.4 0.0 0.0 3.2 3.6 .. .. .. .. .. .. .. .. .. .. .. .. .. Others 1.6 0.0 0.0 0.1 0.3 0.4 .. .. .. .. .. .. .. .. .. .. .. .. .. 05 Canarias To the sea 44.1 75.4 71.6 72.7 79.3 78.4 .. .. .. .. .. .. .. .. .. .. .. .. .. To a watercourse 1.0 0.9 6.5 7.3 0.6 0.5 .. .. .. .. .. .. .. .. .. .. .. .. .. Reused water 53.1 23.7 21.8 19.9 19.9 21.1 .. .. .. .. .. .. .. .. .. .. .. .. .. Soil infiltrations 0.1 0.0 0.0 0.0 0.2 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Others 1.7 0.0 0.1 0.1 0.0 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. 06 Cantabria To the sea 88.0 81.2 75.7 79.5 80.2 81.6 .. .. .. .. .. .. .. .. .. .. .. .. .. To a watercourse 12.0 17.1 23.2 18.8 17.8 16.4 .. .. .. .. .. .. .. .. .. .. .. .. .. Reused water 0.0 1.7 1.1 1.7 2.0 2.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Soil infiltrations 0.0 0.0 0.0 0.0 0.0 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Others 0.0 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 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. To a watercourse 94.9 99.0 98.0 99.1 99.0 98.7 .. .. .. .. .. .. .. .. .. .. .. .. .. Reused water 1.1 1.0 2.0 0.9 1.0 1.3 .. .. .. .. .. .. .. .. .. .. .. .. .. Soil infiltrations 0.0 0.0 0.0 0.0 0.0 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Others 4.0 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 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. To a watercourse 83.7 96.8 98.0 96.2 96.7 93.2 .. .. .. .. .. .. .. .. .. .. .. .. .. Reused water 0.1 2.8 1.9 3.8 2.9 3.5 .. .. .. .. .. .. .. .. .. .. .. .. .. Soil infiltrations 16.1 0.4 0.1 0.0 0.4 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Others 0.0 0.0 0.0 0.0 0.0 3.3 .. .. .. .. .. .. .. .. .. .. .. .. .. 09 Cataluña To the sea 43.5 45.5 72.2 66.3 56.1 54.9 .. .. .. .. .. .. .. .. .. .. .. .. .. To a watercourse 43.8 49.1 23.2 28.7 39.8 40.3 .. .. .. .. .. .. .. .. .. .. .. .. .. Reused water 12.6 5.4 4.5 4.9 4.0 4.7 .. .. .. .. .. .. .. .. .. .. .. .. .. Soil infiltrations 0.1 0.0 0.1 0.1 0.1 0.1 .. .. .. .. .. .. .. .. .. .. .. .. .. Others 0.0 0.0 0.0 0.0 0.0 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. 10 Comunitat Valenciana To the sea 32.2 24.4 23.0 16.5 21.9 26.1 .. .. .. .. .. .. .. .. .. .. .. .. .. To a watercourse 32.1 33.1 32.5 33.6 17.4 17.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Reused water 26.3 42.5 42.7 47.5 59.4 54.8 .. .. .. .. .. .. .. .. .. .. .. .. .. Soil infiltrations 8.7 0.0 1.8 2.4 1.3 2.1 .. .. .. .. .. .. .. .. .. .. .. .. .. Others 0.7 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 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. To a watercourse 100.0 100.0 100.0 100.0 100.0 100.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Reused water 0.0 0.0 0.0 0.0 0.0 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Soil infiltrations 0.0 0.0 0.0 0.0 0.0 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Others 0.0 0.0 0.0 0.0 0.0 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. 12 Galicia To the sea 37.9 29.9 22.3 30.5 45.5 42.7 .. .. .. .. .. .. .. .. .. .. .. .. .. To a watercourse 62.1 58.4 59.5 60.7 54.4 57.3 .. .. .. .. .. .. .. .. .. .. .. .. .. Reused water 0.0 8.6 18.2 8.8 0.1 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Soil infiltrations 0.0 3.1 0.0 0.0 0.0 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Others 0.0 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 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. To a watercourse 33.2 97.4 97.7 97.7 97.6 97.8 .. .. .. .. .. .. .. .. .. .. .. .. .. Reused water 60.4 2.6 2.3 2.3 2.4 1.7 .. .. .. .. .. .. .. .. .. .. .. .. .. Soil infiltrations 0.0 0.0 0.0 0.0 0.0 0.5 .. .. .. .. .. .. .. .. .. .. .. .. .. Others 6.5 0.0 0.0 0.0 0.0 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. 14 Murcia, Región de To the sea 18.6 2.1 1.5 11.5 10.4 5.0 .. .. .. .. .. .. .. .. .. .. .. .. .. To a watercourse 38.7 6.5 2.9 16.7 35.7 33.2 .. .. .. .. .. .. .. .. .. .. .. .. .. Reused water 40.2 91.4 95.6 71.8 50.3 61.7 .. .. .. .. .. .. .. .. .. .. .. .. .. Soil infiltrations 0.0 0.0 0.0 0.0 0.2 0.1 .. .. .. .. .. .. .. .. .. .. .. .. .. Others 2.6 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 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. To a watercourse 100.0 99.8 100.0 100.0 100.0 100.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Reused water 0.0 0.1 0.0 0.0 0.0 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Soil infiltrations 0.0 0.0 0.0 0.0 0.0 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Others 0.0 0.1 0.0 0.0 0.0 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. 16 País Vasco To the sea 52.1 65.7 65.6 67.7 58.9 57.0 .. .. .. .. .. .. .. .. .. .. .. .. .. To a watercourse 46.3 33.4 33.2 31.4 39.5 41.7 .. .. .. .. .. .. .. .. .. .. .. .. .. Reused water 1.6 0.9 1.2 0.9 1.6 1.3 .. .. .. .. .. .. .. .. .. .. .. .. .. Soil infiltrations 0.0 0.0 0.0 0.0 0.0 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Others 0.0 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 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. To a watercourse 100.0 100.0 100.0 100.0 100.0 100.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Reused water 0.0 0.0 0.0 0.0 0.0 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Soil infiltrations 0.0 0.0 0.0 0.0 0.0 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Others 0.0 0.0 0.0 0.0 0.0 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Ceuta and Melilla To the sea 89.8 100.0 99.9 100.0 99.0 99.0 .. .. .. .. .. .. .. .. .. .. .. .. .. To a watercourse 0.0 0.0 0.0 0.0 0.0 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Reused water 10.2 0.0 0.1 0.0 1.0 1.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Soil infiltrations 0.0 0.0 0.0 0.0 0.0 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Others 0.0 0.0 0.0 0.0 0.0 0.0 .. .. .. .. .. .. .. .. .. .. .. .. .. Notes: Source: National Statistics Institute