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Connecting the public to the public sewerage system

Last update of indicator16.12.2021

Indicator definition

This indicator  describes the percentage of the population connected to public sewerage systems.




Key messages

Tempo in the growth of towns, industrialisation of territories, and development of services significantly exceeded the speed in the growth of water management infrastructure (sewerage networks and WWTPs). Existence of water management infrastructure is at the same time a precondition for further social and economic development at the local, regional, national, and global levels. 
Over the last years, Slovakia showed a slight progress in discharging and treatment of municipal wastewater. Number of inhabitants connected to the public sewerage system in 2020 reached the number of 3 769 thous., which represents 69.69 % of total inhabitant count. Compared to 2000, this represents a growth by 12.9 %, growing only by 0.56 % compared to the previous year. In 2020, of total number of 2 890 municipalities, only 1 152 had a built public sewerage system (i.e. 39.86 % of total number of municipalities in Slovakia). Especially the regions of Trenčín, Nitra, Banská Bystrica, and Košice do not keep up with the national average. Despite the reached growth in connecting the public to public sewerage systems, level of connectedness of the public still does not keep up with the development of public water supplies. With regard to the goals and requirements outlined by the Council Directive 91/271/EEC concerning urban waste water treatment, Slovakia focused its maximum attention and funds to building public sewerage systems and increasing the efficiency of waste water treatment plants. (WWTP)  Effects of this process manifest themselves through progressive increase in the number of inhabitants living in households connected to public sewerage systems, but also mainly through improved parameters of discharged treated waste water, and by decreasing the volumes of contaminants into the aquatic environment respectively. 

Summary assessment

Proportion of the inhabitants connected to the public sewerage system in 2020

Source: WRI

International comparison

The OECD Green Growth database contains selected indicators for monitoring progress towards green growth to support policy making and inform the public at large. The database provides a synthesis of data and indicators available across a wide range of domains. The sources of the underlying data used to populate the Green Growth Indicators, as presented here, include a range of OECD databases and, in some cases, external data sources. The database covers OECD member countries, accession countries and selected non-OECD countries (including the BRIICS economies - Brazil, Russian Federation, India, Indonesia, China and South Africa).

OECD Green Growth Indicators Database


Ing. Ľubica Koreňová, SAŽP,


Selection and methodology of indicator’s assessment is based on the set of indicators proposed by the OECD and addressed by the report: "Green Growth: Monitoring progress towards green growth“. Data relating to the national situation are usually presented in the period between 2000 and 2012. Basic time sequence is changed in those cases when the data are not accessible or when their comparison is not possible due to differing approaches in their collection, assessment, changes in methodology, classification, etc.  Summary assessment of indicator’s trend from the green growth perspective is based on a subjective evaluation of the responsible assessor due to the fact that the strategy is not officially implemented in the Slovak Republic and therefore specific objectives have not been defined.  Naturally, this assessment builds on the analysis of the past trends, as well as their anticipated direction in view of the measures adopted as to date.
Selected indicators characterize Slovakia's initial position as seen from the perspective of the green growth and were to be used as a measuring tool before further steps are taken in the process of implementation of this strategy and for a complex assessment of the future trend of the Slovak economy.  Present set of green growth indicators comprises 32 individual indicators that are relevant in Slovakia's conditions. Four of them are national indicators that describe voluntary instruments of the environmental strategy.

Data sources:

Data used in this document come from the official national or international sources and databases.  Assessed trend was reviewed and discussed with the state administration specialists (individual departments of the ministries of Environment, Economy, Labour and Social Affairs and Family, Finance, Agriculture and Rural Development) and their professional organisations (Slovak Hydrometeorological Institute, State Geological Institute of Dionýz Štúr, Slovak Environmnet Agency, State Nature Consservancy, Institute for Financial Policy) and also the Statistical Office of the Slovak Republic whose databases furnish most of the information.

Related indicators:


Linked references: