Title of statistical activity: Water use

Code of statistical activity: 10302

  1. Contact
  2. Metadata update
  3. Statistical presentation
  4. Unit of measure
  5. Reference period
  6. Institutional mandate
  7. Confidentiality
  8. Release policy
  9. Frequency of dissemination
  10. Accessibility and clarity
  11. Quality management
  12. Relevance
  13. Accuracy and reliability
  14. Timeliness and punctuality
  15. Coherence and comparability
  16. Cost and burden
  17. Data revision
  18. Statistical processing

1. Contact Individual or organisational contact points for the data or metadata, including information on how to reach the contact points.

1.1. Contact organisation The name of the organisation of the contact points for the data or metadata.

Statistics Estonia

1.2. Contact organisation unit An addressable subdivision of an organisation.

Economic and Environmental Statistics Department

1.3. Contact name The name of the contact points for the data or metadata.

Eda Grüner

1.4. Contact person function The area of technical responsibility of the contact, such as "methodology", "database management" or "dissemination".

Leading Analyst

1.5. Contact mail address The postal address of the contact points for the data or metadata.

51 Tatari Str, 10134 Tallinn, Estonia

1.6. Contact email address E-mail address of the contact points for the data or metadata.


1.7. Contact phone number The telephone number of the contact points for the data or metadata.

+372 625 9307

2. Metadata update The date on which the metadata element was inserted or modified in the database.

2.1. Metadata last certified Date of the latest certification provided by the domain manager to confirm that the metadata posted are still up-to-date, even if the content has not been amended.


2.2. Metadata last update Date of last update of the content of the metadata.


3. Statistical presentation

3.1. Data description Main characteristics of the data set described in an easily understandable manner, referring to the data and indicators disseminated.

Water extraction by source and type of water, incl. extraction of ground water by aquifers and bodies of groundwater

Water use by type of water and economic activity and by field of water use

Amount of wastewater and pollution load by pollutant; amount of wastewater and pollution load by catchment area

3.2. Classification system Arrangement or division of objects into groups based on characteristics which the objects have in common.

Estonian Classification of Economic Activities (EMTAK 2008) based on NACE Rev. 2

Classification of Estonian administrative units and settlements (EHAK)

3.3. Sector coverage Main economic or other sectors covered by the statistics.

All sectors and activities

3.4. Statistical concepts and definitions Statistical characteristics of statistical observations.

Biological Oxygen Demand (BOD7) – quantity of oxygen expressed in milligrams consumed in the biological decomposition of organic substances contained in one litre of water during 7 days. The source of organic pollutants is wastewater of households, food processing industry and agriculture. The result of large quantity of organic pollutants in water bodies is reduction of oxygen and suffocation of fish and other water biota.

Cooling water – water which is used to absorb and remove heat. The main users of cooling water are large power stations of Ida-Viru county (AS Narva Elektrijaamade Balti elektrijaam and Eesti elektrijaam).

Effluent – water discharged to the environment after being used or rain water collected and discharged through sewerage.

Ground water – fresh water that is being held in, and can usually be recovered from, or via, an underground formation, which may accumulate in wells and filter into surface water bodies.

Mechanical treatment – primary treatment of waste water whereby suspended solids are separated from the sewage by sedimentation, floating, filtration, microfiltration or oil/water separation. It is usually used in combination with other types of treatment, either as the first step (in order to protect other treatment facilities against damage or surface contamination) or as final treatment (in order to remove particulate matter or oils separated during prior treatment).

Mineral water – a special kind of ground water. Mineral water includes minerals or other dissolved substances, which give water taste or therapeutic properties.

Mining water – quantity of water abstracted from mines and quarries during the year.

Rain and drainage water – water from natural sources collected by drainage system, which is not wastewater.

Sea water – quantity of water abstracted from the Baltic Sea during the year.

Surface water – water that stands or flows permanently or temporarily in a water body or water in snow or ice aggregate, except sea water.

Suspended solids – a mixture of fine powdery substances and liquid in which the solid particles are bigger than in a colloidal solution.

Total nitrogen – annual load of nitrogen (N) from households and economic sectors discharged into aquatic ecosystems with waste water.

Total phosphorus – annual load of phosphorus (P) from households and economic sectors discharged into aquatic ecosystems with waste water.

Waste water – water which is damaged beyond the level of harmlessness and which requires purification, or effluent or contaminated rain water.

Water abstraction – water removed from ground or surface water source during the year. Water abstraction from households’ wells, which did not need permit of special use of water is not included.

Water discharge – discharge of effluent into a recipient.

Water use – water that is actually used for a specific purpose such as for domestic use, production and agriculture. Excludes water returned without usage like water extracted in mining and quarrying, draining water, etc.

3.5. Statistical unit Entity for which information is sought and for which statistics are ultimately compiled.


3.6. Statistical population The total membership or population or "universe" of a defined class of people, objects or events.

Enterprises who have been issued a water abstraction permit or an integrated environmental permit


Not applicable

3.7. Reference area The country or geographic area to which the measured statistical phenomenon relates.

Estonia as a whole


3.8. Time coverage The length of time for which data are available.


3.9. Base period The period of time used as the base of an index number, or to which a constant series refers.

Not applicable

4. Unit of measure The unit in which the data values are measured.

BOD7 tonne, tonne, m³

5. Reference period The period of time or point in time to which the measured observation is intended to refer.


6. Institutional mandate

6.1. Legal acts and other agreements Legal acts or other formal or informal agreements that assign responsibility as well as the authority to an agency for the collection, processing, and dissemination of statistics.


Not available


Eurostat/OECD Joint Questionnaire “State of Environment” part Inland Water


European Environment Agency (EEA)

Organisation for Economic Co-operation and Development (OECD)

Eurostat/OECD Joint Questionnaire on Inland Waters

7. Confidentiality A property of data indicating the extent to which their unauthorised disclosure could be prejudicial or harmful to the interest of the source or other relevant parties.

7.1. Confidentiality - policy Legislative measures or other formal procedures which prevent unauthorised disclosure of data that identify a person or economic entity either directly or indirectly.

The dissemination of data collected for the purpose of producing official statistics is guided by the requirements provided for in § 32, § 34, § 35, § 38 of the Official Statistics Act.

7.2. Confidentiality - data treatment Rules applied for treating the data set to ensure statistical confidentiality and prevent unauthorised disclosure.

Not applicable

8. Release policy Rules for disseminating statistical data to interested parties.

8.1. Release calendar The schedule of statistical release dates.

Notifications about dissemination of statistics are published in the release calendar, which is available on the website. Every year on 1 October, the release times of the Statistical Database, news releases, main indicators by IMF SDDS and publications are announced in the release calendar (in case of publications – the release month).

8.2. Release calendar access Access to the release calendar information.


8.3. User access The policy for release of the data to users, the scope of dissemination (e.g. to the public, to selected users), how users are informed that the data are being released, and whether the policy determines the dissemination of statistical data to all users.

All users have been granted equal access to official statistics: dissemination dates of official statistics are announced in advance and no user category (incl. Eurostat, state authorities and mass media) is provided access to official statistics before other users. Official statistics are first published in the Statistical Database. If there is also a news release, it is published simultaneously with data in the Statistical Database. Official statistics are available on the website at 8:00 a.m. on the date announced in the release calendar.

9. Frequency of dissemination The time interval at which the statistics are disseminated over a given time period.


10. Accessibility and clarity

10.1. News release Regular or ad-hoc press releases linked to the data.

Not published

10.2. Publications Regular or ad-hoc publications in which the data are made available to the public.

Not published

10.3. Online database Information about on-line databases in which the disseminated data can be accessed.

Data are published under the subject area “Environment / Natural resources and their use” and “Environment / Environmental pressure” in the Statistical Database at http://pub.stat.ee.

10.4. Microdata access Information on whether micro-data are also disseminated.

The dissemination of data collected for the purpose of producing official statistics is guided by the requirements provided for in § 33, § 34, § 35, § 36, § 38 of the Official Statistics Act. Access to micro-data and anonymisation of microdata are regulated by Statistics Estonia’s procedure for dissemination of confidential data for scientific purposes: https://www.stat.ee/dokumendid/51669.

10.5. Other References to the most important other data dissemination done.

Data serve as input for statistical activities 10001 “Environmental trends”, 10601 “Material flow accounts”, 50101 “Regional development” and 50201 “Sustainable development indicators”.

10.6. Documentation on methodology Descriptive text and references to methodological documents available.

Data Collection Manual for the OECD/Eurostat Joint Questionnaire on Inland Waters. Concepts, definitions, current practices, evaluations and recommendations, Eurostat (2008)


10.7. Quality documentation Documentation on procedures applied for quality management and quality assessment.

Not available

11. Quality management Systems and frameworks in place within an organisation to manage the quality of statistical products and processes.

11.1. Quality assurance All systematic activities implemented that can be demonstrated to provide confidence that the processes will fulfil the requirements for the statistical output.

To assure the quality of processes and products, Statistics Estonia applies the EFQM Excellence Model, the European Statistics Code of Practice and the Quality Assurance Framework of the European Statistical System (ESS QAF). Statistics Estonia is also guided by the requirements in § 7. “Principles and quality criteria of producing official statistics” of the Official Statistics Act.

11.2. Quality assessment Overall assessment of data quality, based on standard quality criteria.

Statistics Estonia performs all statistical activities according to an international model (Generic Statistical Business Process Model – GSBPM). According to the GSBPM, the final phase of statistical activities is overall evaluation using information gathered in each phase or sub-process; this information can take many forms, including feedback from users, process metadata, system metrics and suggestions from employees. This information is used to prepare the evaluation report which outlines all the quality problems related to the specific statistical activity and serves as input for improvement actions.

12. Relevance The degree to which statistical information meet current and potential needs of the users.

12.1. User needs Description of users and their respective needs with respect to the statistical data.

Ministry of the Environment

Ministry of the Interior

Stockholm Environment Institute (SEI Tallinn)

Users’ suggestions and information about taking these into account are available on the website of Statistics Estonia at https://www.stat.ee/statistikatood.

12.2. User satisfaction Measures to determine user satisfaction.

Since 1996, Statistics Estonia conducts reputation and user satisfaction surveys.

All results are available on the website at https://www.stat.ee/user-surveys.

12.3. Completeness The extent to which all statistics that are needed are available.

Complete for the territory of Estonia as a whole

13. Accuracy and reliability Accuracy: closeness of computations or estimates to the exact or true values that the statistics were intended to measure.
Reliability: closeness of the initial estimated value to the subsequent estimated value.

13.1. Overall accuracy Assessment of accuracy, linked to a certain data set or domain, which is summarising the various components.

The type of survey and the data collection methods ensure sufficient coverage and timeliness.

13.2. Sampling error That part of the difference between a population value and an estimate thereof, derived from a random sample, which is due to the fact that only a subset of the population is enumerated.

Not applicable

13.3. Non-sampling error Error in survey estimates which cannot be attributed to sampling fluctuations.

Not measured

14. Timeliness and punctuality

14.1. Timeliness Length of time between data availability and the event or phenomenon they describe.

The data are published 300 days after the end of the reference year (T + 300).

14.2. Punctuality Time lag between the actual delivery of the data and the target date when it should have been delivered.

The data have been published at the time announced in the release calendar.

15. Coherence and comparability

15.1. Comparability - geographical The extent to which statistics are comparable between geographical areas.

Not applicable

15.2. Comparability - over time The extent to which statistics are comparable or reconcilable over time.

The data are comparable over time.

15.3. Coherence - cross domain The extent to which statistics are reconcilable with those obtained through other data sources or statistical domains.

Water use statistics are in compliance with the statistical activity 10601 “Material flow accounts” and statistical activity 10001 “Environmental trends”.

15.4. Coherence - internal The extent to which statistics are consistent within a given data set.

The outputs of the statistical activity are coherent.

16. Cost and burden Cost associated with the collection and production of a statistical product and burden on respondents.

17. Data revision Any change in a value of a statistic released to the public.

17.1. Data revision - policy Policy aimed at ensuring the transparency of disseminated data, whereby preliminary data are compiled that are later revised.

The data revision policy and notification of corrections are described in the dissemination policy of Statistics Estonia at https://www.stat.ee/dissemination-policy.

17.2. Data revision - practice Information on the data revision practice.

The published data may be revised if the methodology is modified, errors are discovered, new or better data become available.

18. Statistical processing

18.1. Source data Characteristics and components of the raw statistical data used for compiling statistical aggregates.


Not used


The following data are received from the Estonian Environment Agency: water extraction by source and type of water, including extraction of ground water by aquifers and bodies of groundwater; water consumption by type of water and economic activity and by field of water use; wastewater discharge and pollution load by pollutant; wastewater discharge and pollution load by catchment area; wastewater discharge and pollution load by wastewater collection area; level and method of wastewater treatment by wastewater collection area; capacity of treatment plants covered by the Council Directive concerning urban wastewater treatment by amount of water treated, BOD by population equivalent; volume of sludge and sludge treatment method.


Not used

18.2. Frequency of data collection Frequency with which the source data are collected.


18.3. Data collection Systematic process of gathering data for official statistics.

Enterprises which have been issued a water abstraction permit or an integrated environmental permit submit a report to the Environmental Board (by 15 February). The Environmental Board submits a report to the Estonian Environment Agency (by 1 March).

Statistics Estonia receives aggregated data together with the source data from the Estonian Environment Agency by e-mail.

18.4. Data validation Process of monitoring the results of data compilation and ensuring the quality of statistical results.

Arithmetic and qualitative controls are used in the validation process, including comparison with other data. Before data dissemination, the internal coherence of the data is checked. The data are compared with the data of previous periods and checked for inconsistencies.

18.5. Data compilation Operations performed on data to derive new information according to a given set of rules.

The collected data are converted into statistical output. This includes calculating additional indicators. New variables are calculated by applying arithmetic conversion to already existing variables. Microdata are aggregated to the level necessary for analysis.

18.6. Adjustment The set of procedures employed to modify statistical data to enable it to conform to national or international standards or to address data quality differences when compiling specific data sets.

Not applicable

19. Comments Supplementary descriptive text which can be attached to data or metadata.

Not available