Water supply and sanitation Structural indicators of the network by autonomous communities Units: metre/resident m3/km/year 2020 2018 2016 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 National Total 1. Length of the supply network by resident (metres/resident) 5.6 5.7 5.5 5.6 5.8 .. .. .. .. .. .. .. .. .. .. .. .. .. 2. Length of the sewerage network per resident (metres/resident) 3.1 3.1 3.1 3.2 3.2 .. .. .. .. .. .. .. .. .. .. .. .. .. 3. Real losses per kilometre of the supply network (m3/km/year) 2,448 2,476 2,728 2,503 2,492 .. .. .. .. .. .. .. .. .. .. .. .. .. 4. Number of storm ponds 270 268 275 314 272 .. .. .. .. .. .. .. .. .. .. .. .. .. 01 Andalucía 1. Length of the supply network by resident (metres/resident) 5.4 5.4 5.3 5.5 5.3 .. .. .. .. .. .. .. .. .. .. .. .. .. 2. Length of the sewerage network per resident (metres/resident) 3.8 3.6 3.7 3.8 3.7 .. .. .. .. .. .. .. .. .. .. .. .. .. 3. Real losses per kilometre of the supply network (m3/km/year) 2,833 2,734 3,559 3,281 3,208 .. .. .. .. .. .. .. .. .. .. .. .. .. 4. Number of storm ponds 9 9 8 8 6 .. .. .. .. .. .. .. .. .. .. .. .. .. 02 Aragón 1. Length of the supply network by resident (metres/resident) 4.1 3.9 4.1 3.9 3.7 .. .. .. .. .. .. .. .. .. .. .. .. .. 2. Length of the sewerage network per resident (metres/resident) 3.5 3.6 3.7 3.3 3.0 .. .. .. .. .. .. .. .. .. .. .. .. .. 3. Real losses per kilometre of the supply network (m3/km/year) 5,574 4,940 4,176 5,170 5,683 .. .. .. .. .. .. .. .. .. .. .. .. .. 4. Number of storm ponds 9 9 12 12 9 .. .. .. .. .. .. .. .. .. .. .. .. .. 03 Asturias, Principado de 1. Length of the supply network by resident (metres/resident) 8.6 8.1 8.6 8.1 9.0 .. .. .. .. .. .. .. .. .. .. .. .. .. 2. Length of the sewerage network per resident (metres/resident) 5.0 4.8 5.0 4.9 5.1 .. .. .. .. .. .. .. .. .. .. .. .. .. 3. Real losses per kilometre of the supply network (m3/km/year) 2,323 1,889 2,358 2,317 2,467 .. .. .. .. .. .. .. .. .. .. .. .. .. 4. Number of storm ponds 1 1 0 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. 04 Balears, Illes 1. Length of the supply network by resident (metres/resident) 3.4 3.6 3.6 3.7 3.8 .. .. .. .. .. .. .. .. .. .. .. .. .. 2. Length of the sewerage network per resident (metres/resident) 3.2 3.1 3.2 3.3 3.3 .. .. .. .. .. .. .. .. .. .. .. .. .. 3. Real losses per kilometre of the supply network (m3/km/year) 4,812 5,007 5,536 4,527 4,058 .. .. .. .. .. .. .. .. .. .. .. .. .. 4. Number of storm ponds 0 0 0 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. 05 Canarias 1. Length of the supply network by resident (metres/resident) 7.4 8.1 7.8 7.4 7.8 .. .. .. .. .. .. .. .. .. .. .. .. .. 2. Length of the sewerage network per resident (metres/resident) 2.4 2.8 2.5 2.6 3.9 .. .. .. .. .. .. .. .. .. .. .. .. .. 3. Real losses per kilometre of the supply network (m3/km/year) 3,083 2,859 3,110 2,650 2,691 .. .. .. .. .. .. .. .. .. .. .. .. .. 4. Number of storm ponds 2 2 2 2 2 .. .. .. .. .. .. .. .. .. .. .. .. .. 06 Cantabria 1. Length of the supply network by resident (metres/resident) 6.4 6.8 6.5 6.7 6.1 .. .. .. .. .. .. .. .. .. .. .. .. .. 2. Length of the sewerage network per resident (metres/resident) 4.0 4.0 4.2 4.2 4.4 .. .. .. .. .. .. .. .. .. .. .. .. .. 3. Real losses per kilometre of the supply network (m3/km/year) 3,861 4,626 6,116 4,761 5,187 .. .. .. .. .. .. .. .. .. .. .. .. .. 4. Number of storm ponds 10 9 6 6 4 .. .. .. .. .. .. .. .. .. .. .. .. .. 07 Castilla y León 1. Length of the supply network by resident (metres/resident) 6.8 6.6 6.8 6.6 7.3 .. .. .. .. .. .. .. .. .. .. .. .. .. 2. Length of the sewerage network per resident (metres/resident) 4.1 4.4 4.0 4.3 4.1 .. .. .. .. .. .. .. .. .. .. .. .. .. 3. Real losses per kilometre of the supply network (m3/km/year) 2,294 2,579 2,578 3,000 3,189 .. .. .. .. .. .. .. .. .. .. .. .. .. 4. Number of storm ponds 6 5 6 2 2 .. .. .. .. .. .. .. .. .. .. .. .. .. 08 Castilla - La Mancha 1. Length of the supply network by resident (metres/resident) 6.8 7.2 7.0 6.7 7.3 .. .. .. .. .. .. .. .. .. .. .. .. .. 2. Length of the sewerage network per resident (metres/resident) 4.1 4.1 4.0 3.9 4.3 .. .. .. .. .. .. .. .. .. .. .. .. .. 3. Real losses per kilometre of the supply network (m3/km/year) 3,217 2,863 2,512 2,738 2,346 .. .. .. .. .. .. .. .. .. .. .. .. .. 4. Number of storm ponds 6 6 6 6 7 .. .. .. .. .. .. .. .. .. .. .. .. .. 09 Cataluña 1. Length of the supply network by resident (metres/resident) 5.1 5.2 5.4 5.4 5.6 .. .. .. .. .. .. .. .. .. .. .. .. .. 2. Length of the sewerage network per resident (metres/resident) 1.9 1.9 1.9 1.9 1.9 .. .. .. .. .. .. .. .. .. .. .. .. .. 3. Real losses per kilometre of the supply network (m3/km/year) 2,207 2,124 2,272 1,669 1,739 .. .. .. .. .. .. .. .. .. .. .. .. .. 4. Number of storm ponds 19 19 19 16 8 .. .. .. .. .. .. .. .. .. .. .. .. .. 10 Comunitat Valenciana 1. Length of the supply network by resident (metres/resident) 7.9 8.1 6.9 7.6 8.6 .. .. .. .. .. .. .. .. .. .. .. .. .. 2. Length of the sewerage network per resident (metres/resident) 2.6 3.1 3.1 2.9 3.2 .. .. .. .. .. .. .. .. .. .. .. .. .. 3. Real losses per kilometre of the supply network (m3/km/year) 1,922 2,531 2,508 2,043 2,002 .. .. .. .. .. .. .. .. .. .. .. .. .. 4. Number of storm ponds 9 9 9 9 6 .. .. .. .. .. .. .. .. .. .. .. .. .. 11 Extremadura 1. Length of the supply network by resident (metres/resident) 7.8 7.8 7.4 6.4 7.0 .. .. .. .. .. .. .. .. .. .. .. .. .. 2. Length of the sewerage network per resident (metres/resident) 3.6 3.6 3.0 3.0 3.2 .. .. .. .. .. .. .. .. .. .. .. .. .. 3. Real losses per kilometre of the supply network (m3/km/year) 2,407 2,903 3,559 3,594 3,448 .. .. .. .. .. .. .. .. .. .. .. .. .. 4. Number of storm ponds 5 5 5 2 1 .. .. .. .. .. .. .. .. .. .. .. .. .. 12 Galicia 1. Length of the supply network by resident (metres/resident) 6.1 5.6 5.9 5.8 6.4 .. .. .. .. .. .. .. .. .. .. .. .. .. 2. Length of the sewerage network per resident (metres/resident) 4.5 4.5 4.8 4.9 5.0 .. .. .. .. .. .. .. .. .. .. .. .. .. 3. Real losses per kilometre of the supply network (m3/km/year) 2,391 2,620 3,550 2,504 2,525 .. .. .. .. .. .. .. .. .. .. .. .. .. 4. Number of storm ponds 54 54 62 54 54 .. .. .. .. .. .. .. .. .. .. .. .. .. 13 Madrid, Comunidad de 1. Length of the supply network by resident (metres/resident) 2.7 2.8 2.8 2.8 2.8 .. .. .. .. .. .. .. .. .. .. .. .. .. 2. Length of the sewerage network per resident (metres/resident) 2.2 2.3 2.3 2.2 1.9 .. .. .. .. .. .. .. .. .. .. .. .. .. 3. Real losses per kilometre of the supply network (m3/km/year) 1,086 570 775 1,295 1,695 .. .. .. .. .. .. .. .. .. .. .. .. .. 4. Number of storm ponds 63 63 63 63 64 .. .. .. .. .. .. .. .. .. .. .. .. .. 14 Murcia, Región de 1. Length of the supply network by resident (metres/resident) 7.5 7.7 7.6 7.5 7.4 .. .. .. .. .. .. .. .. .. .. .. .. .. 2. Length of the sewerage network per resident (metres/resident) 4.2 4.2 4.3 4.1 4.0 .. .. .. .. .. .. .. .. .. .. .. .. .. 3. Real losses per kilometre of the supply network (m3/km/year) 1,286 1,282 1,489 1,535 1,439 .. .. .. .. .. .. .. .. .. .. .. .. .. 4. Number of storm ponds 10 10 10 10 9 .. .. .. .. .. .. .. .. .. .. .. .. .. 15 Navarra, Comunidad Foral de 1. Length of the supply network by resident (metres/resident) 5.6 5.2 5.2 4.8 4.3 .. .. .. .. .. .. .. .. .. .. .. .. .. 2. Length of the sewerage network per resident (metres/resident) 5.9 5.9 4.9 5.2 5.2 .. .. .. .. .. .. .. .. .. .. .. .. .. 3. Real losses per kilometre of the supply network (m3/km/year) 3,609 3,530 2,812 3,470 4,042 .. .. .. .. .. .. .. .. .. .. .. .. .. 4. Number of storm ponds 21 21 21 21 11 .. .. .. .. .. .. .. .. .. .. .. .. .. 16 País Vasco 1. Length of the supply network by resident (metres/resident) 5.9 6.0 5.9 5.6 6.1 .. .. .. .. .. .. .. .. .. .. .. .. .. 2. Length of the sewerage network per resident (metres/resident) 1.8 1.8 1.9 2.1 2.3 .. .. .. .. .. .. .. .. .. .. .. .. .. 3. Real losses per kilometre of the supply network (m3/km/year) 1,523 1,532 1,103 1,350 954 .. .. .. .. .. .. .. .. .. .. .. .. .. 4. Number of storm ponds 46 46 46 28 28 .. .. .. .. .. .. .. .. .. .. .. .. .. 17 Rioja, La 1. Length of the supply network by resident (metres/resident) 3.7 3.6 3.0 3.4 3.4 .. .. .. .. .. .. .. .. .. .. .. .. .. 2. Length of the sewerage network per resident (metres/resident) 3.8 3.3 2.7 3.0 3.4 .. .. .. .. .. .. .. .. .. .. .. .. .. 3. Real losses per kilometre of the supply network (m3/km/year) 7,776 6,528 6,949 4,539 5,820 .. .. .. .. .. .. .. .. .. .. .. .. .. 4. Number of storm ponds 0 0 0 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. Ceuta and Melilla 1. Length of the supply network by resident (metres/resident) 2.4 2.3 2.4 2.3 2.3 .. .. .. .. .. .. .. .. .. .. .. .. .. 2. Length of the sewerage network per resident (metres/resident) 1.8 1.7 1.8 1.7 1.7 .. .. .. .. .. .. .. .. .. .. .. .. .. 3. Real losses per kilometre of the supply network (m3/km/year) 12,036 13,012 15,325 14,954 14,724 .. .. .. .. .. .. .. .. .. .. .. .. .. 4. Number of storm ponds 0 0 0 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. Notes: 1) In the national total, the data relating to the autonomous cities of Ceuta and Melilla are included. The values of the variables 'Lengths of supply and sewerage networks' and 'Real losses per km of network' in each Autonomous Community are considered to be advance data until a representative time series is established that allows an estimate to be made that is not affected by the variability of the survey's expanded factors. C* - Table modified on 05/19/2023 Source: National Statistics Institute