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Wastewater treatment plants. Overall performances Catalonia
Average elimination performance (%)
Operative treatment plants Treatment plants analysed Volume treated (1,000 m3/day) Volume treated (hm3/year) Suspended materials Biochemical demand for oxygen Chemical demand for oxygen
2022 545 518 1,673.4 610.8 95.7 97.1 93.4
2021 536 511 1,715.2 626.0 95.8 96.9 92.9
2020 527 507 1,935.2 706.4 95.1 96.3 91.7
2019 523 509 1,784.5 651.2 95.4 96.3 93.2
2018 518 493 1,880.0 690.0 94.0 96.0 93.0
2017 516 .. Confidential data, low reliability or not available 1,742.0 635.8 94.0 96.0 94.3
2016 510 493 1,713.0 626.9 94.0 96.0 94.0
2015 495 474 1,704.0 622.0 94.7 95.4 93.4
2014 489 475 1,723.5 629.1 94.0 95.1 92.7
2013 455 430 1,788.2 652.7 93.0 94.0 91.0
2012 439 411 1,771.6 648.4 93.0 96.0 92.0
2011 414 368 1,917.1 699.7 95.0 95.0 91.0
2010 389 378 1,934.8 706.2 94.0 94.0 90.0
2009 368 363 1,850.7 675.3 93.0 95.0 90.0
2008 340 336 1,816.9 664.3 94.0 96.0 90.0
2007 335 330 1,805.5 660.7 94.0 95.0 90.0
2006 330 326 1,879.5 686.0 92.0 95.0 86.0
2005 328 320 1,857.1 675.6 89.0 91.0 .. Confidential data, low reliability or not available
2004 314 301 1,970.7 719.8 87.7 90.9 .. Confidential data, low reliability or not available
2003 297 279 1,958.8 715.0 93.2 94.5 .. Confidential data, low reliability or not available
2002 290 275 1,606.8 586.5 89.3 91.9 .. Confidential data, low reliability or not available
2001 270 248 1,534.2 560.0 93.6 94.4 .. Confidential data, low reliability or not available
2000 246 242 1,556.9 568.3 92.2 93.7 .. Confidential data, low reliability or not available
1999 225 219 1,536.1 560.7 91.0 94.0 .. Confidential data, low reliability or not available
1998 210 204 1,520.0 554.8 93.0 93.9 .. Confidential data, low reliability or not available
1997 188 185 1,559.0 569.0 89.3 91.3 .. Confidential data, low reliability or not available
Source: Agència Catalana de l'Aigua.
Notes:
Treatment plants analysed: some systems were not analysed because they became operational at the end of the year, because it was not possible to obtain a sample due to them being septic tank or infiltration type facilities or because they were plants operated on a seasonal basis.
Only includes public treatment plants.
(..) Confidential data, low reliability or not available.

Last update: June 16, 2023.

Methodological note

Methodological aspects

The Catalan Water Agency (ACA) manages and plans the water cycle, with a vision of integrated water systems, taking into account the balance of all ecosystems. Water becomes a basic structural and functional element to the environment and life. This management must be compatible with the growing demand for permanence, universality and immediacy of the citizens of an advanced society, and ensure quality and good service.

The data on water quality shows the controls registered in accordance with the Framework directive on water from the year 2007. For the study of the bathing water for beaches, rivers and lakes, the microbiological quality of the water is measured. For wastewater treatment plants, data is provided on the capacity of treatment, the population served and overall performance.

Unavailable information is represented using the symbol ":". When the value is lower than that of the minimum unit to be able to estimate the statistical operation or if it effects statistical confidentiality, the symbol used is "..".