Survey on water balance on inland waters

Statistical Office of the Republic of Serbia

Division for environmetal statistics and accounts

Ana Vignjević

Senior Statistician

Milana Rakića 5

ana.vignjevic@stat.gov.rs

+381 11 2412 922 ext. 399

Not applicable.

Survey on total water balace contains data on the quantities of total abstracted, used and wastewater in all sectors of Classification of Activity as well as for households.

The survey contains data on: 

• Abstracted water quantities by supply sources: from self supply, from public water supply and water losses
• Use of water for irrigation, for livestock, for aquaculture, for industry (cooling, in hydroelectric power plants, production process, as well as sanitary waters and their use for other purposes), for construction, for households, for service activities; ·
• The total wastewater discharges, both untreated and treated by primary, secondary or tertiary treatment, discharged other types of waters (rainwater, water from the mine, etc.).

For the purpose of the survey is applied:

• Classification of Activities (CA-2010, “Official gazette of RS”, No 54/10)

Survey includes all sections that are defined in surveys on water statistics.

Underground water relates to water stocks beneath the land surface.

Surface water refers to all running or stagnant waters on the surface of the Earth found in streams, rivers (watercourses), lakes, accumulations, etc, as well as in artificial waterways for the purpose of irrigation, creation of navigation canals, etc.

Own water abstraction source means any water abstraction by the user for its end-use consumption.

Water use refers to all the quantities of water supplied to the reporting units during the reference year for the purpose of undertaking their production activities.

Wastewaters are waters which are, after being used, transported to the treatment plant or let out in a water body (underground, surface waters). Atmospheric waters, flowing waters used in hydropower plants and cooling water are excluded.

Treated wastewaters are quantities of wastewaters treated during the reference year.

Primary treatment of wastewaters by physical and/or chemical procedure includes the collection of suspended particles, and other processes in which BOD is reduced by at least 20% before being discharged. It also covers the total suspended particles of incoming wastewaters reduced to by least 50%.

Secondary treatment of wastewaters includes biological treatment with secondary collection or by other by other processes, which result in COD reduction of at least 70% and COD reduction of at least 75%.

Tertiary treatment is the next wastewater treatment process after the secondary treatment of nitrogen and/or phosphorous and/or any other pollutant affecting the quality and specific use of water: organic pollution reduced up to at least 95% for BOD and 85% for COD, being: at least 70% nitrogen removal, at least 80% phosphorous removal and microbiological removal until a coliform density of 1000 in 100 ml is reached.

Statistical units are local units that are defined in statistical water surveys from which data are taken.

The statistical population is defined in the statistical water surveys from which the data are taken.

Republic of Serbia 

Note: Since 1999, the Statistical Office of the Republic of Serbia is not responsible for certain data for the Autonomous Province of Kosovo and Metohija, so that they are not included in the coverage of the Republic of Serbia data (total).

2000-2019

Not applicable.

The data are published in millions of cubic meters.

Annual. 

National legislation:

The survey is conducted аlso according to requirements of „JQ OECD/ Eurostat“(JQ OECD/Eurostat – Inland water), questionnaire for Inland Water and questionnaire UNSD/UNEP – Environmental Statistics (UNSD/UNEP – Environmental statistics.

Data are sended to Eurostat every second year, and these data are published in Eurostat´s data base.

Data confidentiality is stipulated by:

- Official Statistics Law (Official Gazette of RS, number 104/2009), Articles 44, 45, 46, 47, 48, and 49.

(www.stat.gov.rs/media/2322/zakon_o_statisticie.pdf)

- Rulebook on statistical data protection in the Statistical Office of the Republic of Serbia

(www.stat.gov.rs/media/2343/rulebook-on-statistical-data-protection-in-sors.doc ) 

- Guidelines on measures of data and information protection in the Statistical Office of the Republic of Serbia

(www.stat.gov.rs/media/2341/guidelines-on-measures-of-data-and-information-protection-in-the-sors.doc )

Data are published at the aggregated level.

Calendar of releases is available at SORS website:

http://www.stat.gov.rs/en-US/calendar

Dissemination and publication of data is annual.

Not applicable.

• Eco-bulletin
• Website: www.stat.gov.rs

The data are available in the database of the Statistical Office of the Republic of Serbia, Division Environment, the subdivision Water.

Not applicable.

Not applicable.

Not applicable.

SORS describe the sources and methods in the quality report and metadata. A summary of the quality information. At the country level is available on SORS web page (QMC- quality management system).

The questionnaire is filled in complying with all the recommendations and guidelines given in the Filling Instruction. All data are obtained from the statistical reports that the reporting units submit to the Statistical Office of the Republic of Serbia. After detailed analysis and verification, these data can be considered valid and reliable.

-           National users: Ministry of Environmental Protection, Republic Hydrometeorological Service of Serbia, Water Directorate, Serbian Environmental Protection Agency,  environmental associations, NGO´s, local municipalities;

-          International users: Eurostat; UN, European Environment Agency (EEA), European Data Centre for Water (WISE).

On biennial basis (once in two years), by the means of web interview, implemented is the User Satisfaction Survey. The survey results are available at SORS website: http://www.stat.gov.rs/en-US/o-nama/sistem-upravljanja-kvalitetom.

Not applicable.

Not applicable.

Not applicable.

Not applicable.

The data are available in the 12th month of the end of the reporting year. 

Preliminary data are published in accordance with the deadline given in the Regulation on the Plan of official statistics. Final data are published in accordance with the terms announced in the Regulation on the Plan of official statistics and the Release Calendar.

The application of concepts and definitions from the methodology enables geographical comparability with the data of EU countries.

The time series has been available since 2000 without time brake.

Not applicable.

Not applicable.

Not available.

The published data should be regarded as final, unless otherwise stated. Corrections and revisions might occur.

For conducting the survey on total water balance are used surveys of statistics of water:

Annual survey on water use and protection against pollution, VOD-1;

Annual survey on drinking water supply, VOD-2v;

Annual survey on urban wastewater, VOD-2k;

Annual survey on irrigation, VOD-4.

In addition, for this survey are used statistician sources of data (statistics of agriculture) and estimation.

Data are collected annualy. 

Data are obtained from  water statistics surveys from which data are taken.

Validation of data is done during the entire data processing from input to final results.

Not applicable.

Not applicable.