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Population connected to at least secondary waste water treatment

Population connected to at least secondary waste water treatment
Catalonia Spain European Union-27
2020 97.12 .. ..
2019 97.02 .. ..
2018 97.01 .. ..
2017 97.00 .. ..
2016 97.00 86.62 ..
Units: Percentage.
Source Catalonia: Ministry of Territory and Sustainability. Catalan Water Agency. Source Spain and European Union: Eurostat.
(..) Confidential data, low reliability or not available.

Last update: March 30, 2021.

Methodological note

The indicator measures the percentage of population connected to waste water treatment systems with at least secondary treatment. Thereby, waste water from urban sources or elsewhere is treated by a process generally involving biological treatment with a secondary settlement or other process, resulting in a removal of organic material that reduces the biochemical oxygen demand (BOD) by at least 70 % and the chemical oxygen demand (COD) by at least 75 %.