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A remarkable increase in expenditure levels for water supply services is observed in Romania (5.1 %) for the period, followed by high and moderate ones for Croatia (3.3%), Poland (1.5 %) and Slovakia (1.5%), respectively. Acknowledging the challenges associated with defining an affordability threshold for water services and with using it across countries, applying a 5% indicative threshold suggests that affordability of water services may be a concern for Romania in 2012 (4,4%), 2017 (4,7%) and 2019 (5,4%), and to less extent for Croatia in 2013 (3,3%).