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Data sources and data providers:

The European Pollutant Release and Transfer Register (E-PRTR), Member States reporting under Article 7 of Regulation (EC) No 166/2006 provided by the European Environment Agency (EEA, 2019).

Waterbase — UWWTD: Urban Waste Water Treatment Directive — reported data provided by the Directorate-General for Environment (DG ENV) and the European Environment Agency (EEA, 2020).

European Catchments and Rivers Network System (Ecrins) provided by the European Environment Agency (EEA, 2018).

Urban morphological zones 2006 provided by the European Environment Agency (EEA, 2014).

Waterbase — Water Quantity provided by the European Environment Agency (EEA, 2021).

Water statistics (Eurostat) provided by the Statistical Office of the European Union (Eurostat, 2021b).

Eurostat statistics on population provided by the Statistical Office of the European Union (Eurostat, 2020b).

Lisflood. Distributed Water Balance and Flood Simulation Model provided by the Joint Research Centre (JRC) (Burek et al., 2013).

National Statistical offices (dataset URL is not available) provided by the Statistical Office of the European Union (Eurostat, 2021a).

Previous comments

gomesfer (Fernanda Gomes) 26 Aug 2022 19:40:20

We consider that the diversity of data sources (EEA/EIONET, OECD, Eurostat, AQUAstat,…), all with different purposes, assumptions and statistical treatment, can cause problems of coherence and comparability. For this reason it was important to ask each member state to validate its baseline data, whether this data is correct vis-à-vis the intended target, before calculating the indicator.
- zalllnih (Nihat Zal) 15 Sep 2022 10:24:49
  
  Thank you for your comment, all data reported to EU or other international organizations are considered as validated ones. We've gone through an extensive assessment of potential different definitions of parameters under these datasets and in very limited cases it required additional data curation. Other than this, these data sources are fit for calculating the WEI+ indicator
  
  We consider that the diversity of data sources (EEA/EIONET, OECD, Eurostat, AQUAstat,…), all with different purposes, assumptions and statistical treatment, can cause problems of coherence and comparability. For this reason it was important to ask each member state to validate its baseline data, whether this data is correct vis-à-vis the intended target, before calculating the indicator.
guzmojan (Janka Guzmová) 31 Aug 2022 13:29:05

We agree with previous comments, that data used for each country should be consulted. For Slovakia we found out (when comparing the data we have reported to EEA for years 2018 and 2019), that for abstractions there was omitted one part of water used for electricity production (only water for cooling was taken in account).
- zalllnih (Nihat Zal) 15 Sep 2022 10:35:03
  
  Thank you for your comment, we will re-assess the Slovakian case in the context of underlying data and potentially correct the WEI+ results. Please be informed that the underlying data on water abstraction used for computing the WEI+ is the same set of data used for developing the indicator on water abstraction by source and by sector which was consulted with the Eionet member countries until 31st January 2022;
  
  Freshwater - Public content available for wider Water Community (europa.eu)
  
  The underlying data and the document clarifying the method for data gap filling can also be seen on here;
  
  https://forum.eionet.europa.eu/nrc-eionet-freshwater/library/indicator-water-abstraction-by-source-and-sector/water-abstraction-dataset.xls/download/en/1/Water%20abstraction%20dataset_EIONET_Consultation.xlsx
  
  https://forum.eionet.europa.eu/nrc-eionet-freshwater/library/indicator-water-abstraction-by-source-and-sector/water-abstraction-data-processing.pdf/download/en/1/Water%20abstraction%20data%20processing.pdf
  
  We agree with previous comments, that data used for each country should be consulted. For Slovakia we found out (when comparing the data we have reported to EEA for years 2018 and 2019), that for abstractions there was omitted one part of water used for electricity production (only water for cooling was taken in account).
giovabra (Giovanni Braca) 01 Sep 2022 17:20:57

Italy:

we agree with previous comments
- zalllnih (Nihat Zal) 15 Sep 2022 10:37:16
  
  We kindly ask you to consult with the EEA feedback to Slovakia on the same comment.
  
  Italy:
  
  we agree with previous comments

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