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For any question on data and metadata, please contact: Eurostat user support |
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1.1. Contact organisation | National Statistical Institute, 2, Panayot Volov Street 1038 Sofia, Bulgaria For information about the NSI publications please go to: |
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1.2. Contact organisation unit | “Environment and energy accounts” |
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1.5. Contact mail address | ppetrov@nsi.bg |
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2.1. Data description | |||
Waste generated Treated waste Number and capacity of landfills Number and capacity of incineration and recycling plants |
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2.2. Classification system | |||
Not available. |
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2.3. Coverage - sector | |||
All NACE sectors and households |
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2.4. Statistical concepts and definitions | |||
Tonnes of waste, Number of installations and landfills, Capacity of installations and landfills |
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2.5. Statistical unit | |||
Enterprises and households |
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2.6. Statistical population | |||
All enterprises over 10 employees and households |
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2.7. Reference area | |||
All enterprises over 10 employees and households |
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2.8. Coverage - Time | |||
2004-2020 |
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2.9. Base period | |||
2004 |
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Data set 1: Waste generation by waste category (EWC-STAT) and economic activities (NACE) General description of methodologyTable 2: Description of methods for determining waste generation
Non-hazardous wastes. The agricultural non-hazardous wastes are studied by a sample survey. The sample(s) is based on a list of enterprises from the Statistical Register and comprehensive from register of ExEA. . The studied population includes enterprises having revenues for the previous year, with more than 10 employees. The population is divided by economic activities as required for reporting:
1 The questionnaires used for the survey are based on the LoW, officially adopted by Ministry of Environment and Waters. For the purposes of the reporting tables a linkage between European List of Waste and EWC-Stat categories is made. The questionnaires have been sent to the enterprises and after their completion returned to the Regional Statistical Offices. Data have been checked and aggregated in a database. The received back in NSI data files have been processed by statistical methods on order to obtain the final results.
The industrial non-hazardous wastes are studied by a sample survey. The sample(s) is based on a list of enterprises from the Statistical Register and comprehensive from register of ExEA. The studied population includes enterprises having revenues for the previous year, with more than 10 employees. The population is divided by economic activities as required for reporting: 2-18 The questionnaires used for the survey are based on the LoW, officially adopted by Ministry of Environment and Waters. For the purposes of the reporting tables a linkage between European List of Waste and EWC-Stat categories is made. Sampling is used in the case of economic activities covering more than 1200 enterprises, while all other are surveyed comprehensively from register of ExEA. The selected list of enterprises has been sent to the Regional Statistical Offices. The questionnaires have been sent to the enterprises and after their completion returned to the Regional Statistical Offices. Data have been checked and aggregated in a database. The received back in NSI data files have been processed by statistical methods on order to obtain the final results.
5.1.1 Description of the estimation of waste generation in the economy on the basis of other methods
Hazardous wastes.
For the hazardous wastes, information from ExEA is used. The information source is the administrative Register of Enterprises Generating Hazardous Wastes. According to Annex 6 to Article 9(1) of the ORDINANCE No. 9 on the order and the formats on which information for waste activities is provided, annual reports on the generated hazardous waste has to be reported to the ExEA. The information obtained from the Register is expected to be enough comprehensive due to the control exercised by ExEA upon the enterprises generating hazardous waste. Validation of information is carried out by the agency’s regional offices through checking up in the enterprises. Data from the enterprises are collected regularly according to the Waste Management Law. Provision of information by the enterprises is obligatory according the law. In case of non-submitting the information a sanction according the law is being imposed. The nomenclature used for data collection on hazardous waste includes all waste types indicated in the European List of Waste (2000/532/EC). The enterprises have the corresponding NACE code for the identification purposes.
5.1.2 Waste generated by households
Municipal wastes (household waste, waste generated by households)
Data source: Municipalities are asked to provide data on the amount of municipal waste landfilled per year. This type of data collection has been sufficient up to the reference year 2018, because then the separate collection of specific waste types, which typically are also generated by households, was not very developed, and on the other hand household wastes were exclusively landfilled. The total generation of municipal waste is estimated, based on the percentage of population, which is covered by MSW-collection service provided by municipalities.
Regression method was used to determine the share of waste generated by enterprises from the total quantity of municipal wastes. Two factor linear regression model is used:
Wastes = a + b* population + c* employees where: "population" is the number of people by municipalities. "employees" is the number of people engaged in NACE sectors G-Q
For the hazardous wastes, information from ExEA 3: Description of classifications used
Determination of waste generation by (sample) surveyFor non-hazardous wastes are studied by samples survey and information from ExEA. The information source is the administrative Register of Enterprises Generating Non-Hazardous Wastes. The sample(s) is based on a list of enterprises from the Statistical Register and comprehensive from register of ExEA. The studied population includes enterprises having revenues for the previous year, with more than 10 employees. The population is divided by economic activities as required for reporting:
Table 4: Waste generation in the economy – sample survey
Determination of waste generation in the economy on the basis of administrative sources For the hazardous wastes, information from ExEA is used. The information source is the administrative Register of Enterprises Generating Hazardous Wastes. According to Annex 6 to Article 9(1) of the ORDINANCE No. 9 on the order and the formats on which information for waste activities is provided, annual reports on the generated hazardous waste has to be reported to the ExEA. The information obtained from the Register is expected to be enough comprehensive due to the control exercised by ExEA upon the enterprises generating hazardous waste. Validation of information is carried out by the agency’s regional offices through checking up in the enterprises. Data from the enterprises are collected regularly according to the Waste Management Law. Provision of information by the enterprises is obligatory according the law. In case of non-submitting the information a sanction according the law is being imposed. The nomenclature used for data collection on hazardous waste includes all waste types indicated in the European List of Waste (2000/532/EC). The enterprises have the corresponding NACE code for the identification purposes.
Determination of extractive waste generation (new section)The materials are not included in reporting data, because they are not supposed be treated as waste. According to Regulation of Waste statistics Waste recycled on the site where it was generated shall not be covered. Table 5: Coverage of waste statistics with regard to extractive waste1)
1) Please mark with an X whether the listed materials are completely covered, partially covered or generally excluded from waste statistics.
Determination of waste generated by householdsTable 6: Determination methods for waste generated by households
The aim of the report is to improve the system of data collection of households’ origin waste in the Republic of Bulgaria. In Bulgaria there are several populations’ origin waste streams. First stream is organized municipal waste collection, where the waste is collected in containers and then is transported to systems for pre-treatment and / or directly to landfills for municipal solid waste. Second stream is separately collected packaging waste. They are collected by the recovery organizations and directly go for recycling. Third stream is consisted by waste transmitted by the population of sites for waste collection. This includes metal packaging, automotive, electrical and electronic equipment, batteries and other recyclable materials waste. Object of the survey are second and third waste streams. For the purpose of providing information about the origin of waste on treatment installations were selected a number of enterprises, whose economic activity is in the field of the following economic sectors: "Collection and disposal", "Recycling of materials" and "Wholesale of waste and scrap." Since the first two streams have clear evidence of the origin of waste, we headed to the third stream. For the purposes of the project were developed statistical methodology and tools for conducting the survey. The population was based on data from the register of holders of documents for waste collection activity (including the widespread waste) of EEA and will be completed by statistical register of companies in the corresponding sector. We also added enterprises that are not included in the register of EEA, but they perform waste management activities. The list covered all enterprises with a turnover of over 100 thousand BGN. For all the rest enterprises we made statistical estimation. The population cover was around 700 enterprises. This list was sent to the EEA. The EEA conducted the survey. After receiving the data set of carried out survey was found that the questionnaires are filled completely and correctly. As a source of data were used accounting documents. For waste that there are not invoices, but only cash receipts are classified as waste from the population. In companies with several sites, each site is described separately. The results of the survey are summarized in several sections of the form as follows: total quantities, quantities received from other companies, and quantities transferred to other companies. In data processing is form a hierarchical structure of the movement of waste, the first level of which are received quantities of waste by population or public companies and institutions. The next level is flow between small and large companies in the sectors of "Recycling" and "Collection of scrap." Based on data, containing identification code (BULSTAT) has been avoided duplication of quantities in the internal flow of waste between companies. In some cases, when small companies are not filled out the questionnaire, but have sent waste to other companies, the relevant quantities are classified as waste from the population. Part of the studied waste (from population) comes from the collection points for recyclables and sites for pre-treatment of waste. Another part of the waste comes from system of separate collection including containers for paper and packaging, as well as reception centres for electronic and electrical equipment, containers for batteries and others. The process is similar for waste collection companies, with the difference that in the large companies and organizations are located containers for separate waste collection. Relevant organization of utilization collects quantities of waste and transport them for recycling. Small companies use network separation located out of the buildings. Practice is when there are large quantities of waste directly to contact to specific company for recycling/ utilization. After the waste is collected to the smaller sites it is stored to collection of a sufficient quantity to be transported to a large site or directly recycling. If it possible, the company can directly export the collected waste for recycling abroad. Unlike the reception centres, waste generated by the system of separate collection is not paid. After the waste is collected in containers it enters in sites for pre-treatment. Waste that does not require pre-treatment is directly transferred for recycling or it is exported for utilization. In processing of individual data was made analysis about movement of waste. All circles of turnover between sites, recycling companies and scrap collection were closed. From the results of the survey is seen that a large amount of waste on sites is delivered by population. The explanation is that in a relatively low income of the population is used every possibility to receive money. In this situation, even the smallest amounts of valuable waste for recycling are sent to the sites against payment. Depending on income, which would bring the waste and the formation of the modern way of thinking, in Bulgaria there are three parallel streams of waste from population. The first is an organized collection by municipalities and separate collection by organizations for utilization/ recycling of packaging. The second are the sites that collect waste against payment. The third is an organized separate collection by utilization/ recycling organizations. Through the conducted survey are covered not only pure materials for processing, but the relevant quantities of packaging and discarded electronic and electrical equipment, ELV and other widespread waste. Waste recycling companies get data not only for collected widespread waste, but the quantities of secondary waste resulting from the dismantling.
Data sets 2 and 3: Waste treatment General description of methodologyThe waste treatment facilities in Bulgaria are identified from the register of the permits for waste treatment, which is operated by the ExEA.
The permits are given by the Ministry of Environment and Waters (MOEW) according Article 12 of the Waste Management Act. The permits cover not only the waste facilities but waste collecting, transport, temporary storage. The register is continuously updated and the number of permits is rising.
For the purposes of the wastes survey, NSI received from MOEW the list of enterprises with permits for 2006. The list included the following information:
- BULSTAT - the identification number from the Statistical Register. (The BULSTAT is officially used by MOEW and ExEA storing information on enterprise level); - name of enterprise; - the R&D codes for which the permit is given.
After checking and adding the actual address and telephone numbers from the statistical register, the list was sent to the Regional Statistical Offices (RSO). The list was used for sending the questionnaires. Identification of relevant treatment facilitiesFor identification of relevant treatment facilities Administrative registers of ExEA - Data base of treatment facilities by Executive Environmental Agency - Waste management act. - Cover whole treatment facilities - Updating the register shall be made annually
Table 7: Registers used for identification of waste treatment operations
Data collection on treated quantitiesData on treated hazardous waste is administrative data, provided by the ExEA, based on the annual reports according to Ordinance No.9.
The data about the treated quantities of non-hazardous wastes are collected together with the survey on waste generation made by NSI and administrative data, provided by the ExEA. The sample contains all waste treatment enterprises, which were known to NSI (exhaustive coverage of sectors36,37 38).
The amount of treated municipal waste is collected by an exhaustive survey of municipalities.
- Survey on non-hazardous wastes, studied population - enterprises; - Survey on municipal wastes, studied population - municipal authorities.
The surveys are included in the National Programme for Statistical Surveys. The questionnaires used for the surveys (2014) are given in Annexes 1, 2 and 3of the QR. The surveys are annual. The R&D codes and European List of Waste
Table 8: Determination of treated waste quantities
Data collection on capacity of treatment facilitiesThe data on the capacity of treatment installation is stored in the administrative register of treatment installations. Information is based on the permit and is updated when the permit is changed. Additionally, the data are revised in certain intervals by ExEA with the aim to ensure that accurate data on the capacity is stored in the register. Data on the permit capacity is reported, which should be the same as the operational capacity.
Landfills have to report the remaining capacity annually according to Annex 7 to Art.9(1) item 3 to Regulation No.9 dated 28.09.2006 on the Order and Formats in which Information on the Waste Activities is to be provided, as well as for Filling-in Public Register of the Issued Permits, Registration Documents and Decommissioned Sites and Activities.
All other treatment facilities do not have to report the capacity annually as this information is already stored in the register of treatment facilities.
The list of the treatment facilities is based on an administrative register. The licences are given by MOEW, but the monitoring and control functions are of responsibility of ExEA. For the facilities the following classification is used:
- Installations for incinerating (with and without energy producing); - Physicochemical; - Mechanical, - Recycling; - Biological
The licences are based on the R&D codes. Major Changes Changes compared with previous yearsMethodological changes to the quantities generated and treated mine waste. Large amounts of waste is not disposed of and used to back fill. They are excluded from the waste generated. Foreseen changesNo changes currently foreseen. |
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3.1. Source data | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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3.2. Frequency of data collection | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Annual. |
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3.3. Data collection | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Data collection with questionnaire and information of ExEA Assessment of the continuity of the data source, e.g. legal basis for the data source: The data source for non-hazardous wastes generation and treatment in sectors 1 is a statistical survey (in some economic activities comprehensive from register of ExEA, in others - sample survey). The survey is based on the Statistical Register and covers the units with more than 10 employees. The data source for non-hazardous waste generation and treatment in sectors 2-18 is a statistical survey (in some economic activities comprehensive from register of ExEA, in others - sample survey). The survey is based on the Statistical Register and covers the units with more than 10 employees. The data source for hazardous waste generation and treatment is the administrative register of the Executive Environmental Agency (ExEA). Data on municipal waste generation and treatment is collected by an exhaustive survey covering all municipalities and survey about origin of recyclable waste from of ExEA. For data on the number and capacity of treatment facilities the administrative register of the ExEA is the data source. In case where no primary data are available, statistical estimations are used. |
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3.4. Data validation | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
The answers to the questions are in the annex Annexes: ANNEX |
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3.5. Data compilation | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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3.6. Adjustment | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
No avail|able. |
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4.1. Quality assurance | |||
Not available. |
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4.2. Quality management - assessment | |||
[not requested] |
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The data are published in an annual statistical publication and are used by the Executive Environment Agency for the purpose of waste management planning, and by the Ministry of Environment and Waters to produce the annual report to the Parliament. |
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5.1. Relevance - User Needs | |||
The data are published in an annual statistical publication and are used by the Executive Environment Agency for the purpose of waste management planning, and by the Ministry of Environment and Waters to produce the annual report to the Parliament. |
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5.2. Relevance - User Satisfaction | |||
The data are published in an annual statistical publication and are used by the Executive Environment Agency for the purpose of waste management planning, and by the Ministry of Environment and Waters to produce the annual report to the Parliament. |
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5.3. Completeness | |||
According to the methodology, there are no missing data. |
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5.3.1. Data completeness - rate | |||
The data are published in an annual statistical publication and used by the Executive Environment Agency for the purpose of waste management planning, and by the Ministry of Environment and Water to produce the annual report to the Parliament. According to the methodology, there is no missing data. |
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6.1. Accuracy - overall | |||
Because of the rather low response rate the coefficients of variation are not calculated. Non-sampling error are described below. Annexes: Anex I Anex II |
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6.2. Sampling error | |||
Because of the rather low response rate the coefficients of variation are not calculated. |
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6.2.1. Sampling error - indicators | |||
Because of the rather low response rate the coefficients of variation are not calculated. |
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6.3. Non-sampling error | |||
Coverage errors
Measurement errors • Which statistical units are applied in which part of the data set?
The statistical unit used for the sample survey is the enterprise.
• Errors in precision of quantities: In 2020, there was comparatively little weighing of waste. Not all waste disposal facilities were equipped with weighing equipment. Therefore, to a large extent the amount of waste is estimated, based on common assumptions of amount of waste per container or amount of waste per volume. This measurement error cannot be quantified.
• A description of the information quality of the data collection:
The questionnaire was validated in a focus group of experts from the ExEA and NSI.
Processing errors
The questionnaires were sent out by the Regional Statistical Offices to the enterprises. A deadline was set for the return of the questionnaires. The data were entered by the Regional Statistical Offices and the files containing the raw data were sent to NSI. There was an arithmetic control and logical control of the data, e.g. plausibility check based on amount of waste/employee. An extension of the sample data was made using the statistical methods described in part 1 of this report.
Non-response errors
• Response rate at the level of the key aggregates: 57%
Model assumption errors
Not applicable |
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6.3.1. Coverage error | |||
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6.3.1.1. Over-coverage - rate | |||
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6.3.1.2. Common units - proportion | |||
•Summary of the processing steps between collection and production of statistics, including measures to detect and rectify processing errors; •The questionnaires were sent out by the Regional Statistical Offices to the enterprises. A deadline was set for the return of the questionnaires. The data were entered by the Regional Statistical Offices and the files containing the raw data were sent to NSI. There was an arithmetic control and logical control of the data, e.g. plausibility check based on amount of waste/employee. An extension of the sample data was made using the statistical methods described in part 1 of this report. |
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6.3.2. Measurement error | |||
• Which statistical units are applied in which part of the data set?
The statistical unit used for the sample survey is the enterprise.
• Errors in precision of quantities: In 2016, there was comparatively little weighing of waste. Not all waste disposal facilities were equipped with weighing equipment. Therefore, to a large extent the amount of waste is estimated, based on common assumptions of amount of waste per container or amount of waste per volume. This measurement error cannot be quantified.
• A description of the information quality of the data collection:
The questionnaire was validated in a focus group of experts from the ExEA and NSI. |
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6.3.3. Non response error | |||
Response rate at the level of the key aggregates: 67% |
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6.3.3.1. Unit non-response - rate | |||
The survey was of mixed type and is not calculated response rate. |
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6.3.3.2. Item non-response - rate | |||
The survey was of mixed type and is not calculated response rate. |
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6.3.4. Processing error | |||
Summary of the processing steps between collection and production of statistics, including measures to detect and rectify processing errors; The questionnaires were sent out by the Regional Statistical Offices to the enterprises. A deadline was set for the return of the questionnaires. The data were entered by the Regional Statistical Offices and the files containing the raw data were sent to NSI. There was an arithmetic control and logical control of the data, e.g. plausibility check based on amount of waste/employee. An extension of the sample data was made using the statistical methods described in part 1 of this report. |
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6.3.4.1. Imputation - rate | |||
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6.3.5. Model assumption error | |||
Not applicable |
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6.4. Seasonal adjustment | |||
Not applicable |
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6.5. Data revision - policy | |||
No available. Not applicable |
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6.6. Data revision - practice | |||
No available. |
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6.6.1. Data revision - average size | |||
No available. |
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The data collection process started March 2021 and finished in May 2021. Data processing took place from May 2021 to December 2021. |
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7.1. Timeliness | |||
The data collection process started March 2021 and finished in May 2021. Data processing took place from May 2021 to December 2021 |
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7.1.1. Time lag - first result | |||
The data collection process started March 2021 and finished in May 2021. |
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7.1.2. Time lag - final result | |||
Data processing took place from May 2021 to December 2021. |
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7.2. Punctuality | |||
The data on waste are published in the Environmental Statistical Publications according to national rules |
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7.2.1. Punctuality - delivery and publication | |||
The data on waste are published in the Environmental Statistical Publications according to national rules |
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As for the reference year 2020 there was only one data source for waste data (as described in this report), coherence of data was not a problem.
There are some methodological changes but data are comparable with those for previous years. |
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8.1. Comparability - geographical | ||||||||||||
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8.1.1. Asymmetry for mirror flow statistics - coefficient | ||||||||||||
No available. |
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8.2. Comparability - over time | ||||||||||||
There are some methodological changes but data are comparable with those for previous years. |
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8.2.1. Length of comparable time series | ||||||||||||
There are some methodological changes but data are comparable with those for previous years (2004-2018). |
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8.3. Coherence - cross domain | ||||||||||||
As for the reference year 2020 there was only one data source for waste data (as described in this report), coherence of data was not a problem. ... |
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8.4. Coherence - sub annual and annual statistics | ||||||||||||
Only annual statistics. |
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8.5. Coherence - National Accounts | ||||||||||||
No availlable. |
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8.6. Coherence - internal | ||||||||||||
As for the reference year 2020 there was only one data source for waste data (as described in this report), coherence of data was not a problem. |
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Waste statistics are disseminated according to the existing practice of disseminating and publishing statistics. The confidentiality policy is based on the Law on Statistics (Article 25, 26, 27).
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9.1. Dissemination format - News release | |||
NSI webside : |
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9.2. Dissemination format - Publications | |||
NSI webside : |
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9.3. Dissemination format - online database | |||
NSI webside : |
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9.3.1. Data tables - consultations | |||
NSI webside : |
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9.4. Dissemination format - microdata access | |||
NSI webside : https://nsi.bg |
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9.5. Dissemination format - other | |||
No. |
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9.6. Documentation on methodology | |||
NSI webside : https://nsi.bg |
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9.7. Quality management - documentation | |||
Quality report. |
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9.7.1. Metadata completeness - rate | |||
NSI webside : https://nsi.bg |
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9.7.2. Metadata - consultations | |||
NSI webside : https://nsi.bg |
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The burden on respondents could not be quantified. Surveys on waste generation have a long tradition in Bulgaria, but the burden has increased because more detailed information was requested (e.g. waste classification according LoW). Additionally, the sample in the 2020 survey was smaller than in previous years, thus decreasing the burden. The following table may be used for this purpose. |
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11.1. Confidentiality - policy | |||
No confidentiality. |
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11.2. Confidentiality - data treatment | |||
No confidentiality. |
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no comments |
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ANNEXS |