ESS Standard for Quality Reports Structure (ESQRS)
| Contact | |
|---|---|
| Contact organisation | National Statistical Institute |
| Contact organisation unit | "Environmental and Energy Statistics" Department |
| Contact name | |
| Contact person function | Chief expert |
| Contact mail address | 2 Panayot Volov St., 1038 Sofia |
| Contact email address | |
| Contact phone number | +359 2 9857 536 |
| Contact fax number | Not available |
| Statistical presentation | |
| Data description | The data for municipal waste include: quantities of generated municipal waste, delivered for landfilliling - direct disposal, delivered for preliminary treatment and delivered for recycling municipal waste, generated municipal waste per capita, share of population and number of settlements served by municipal waste collection system, the number, area and capacity of landfill sites and installation for treatment of municipal waste. The data is result of statistical survey “Municipal waste”, conducted by NSI, data from the demographic statistics for the annual number of the population and administrative date of Environmental Agency. The data from municipal waste is for the country and for the statistical region and districts |
| Classification system |
|
| Sector coverage | The statistical survey covers the municipalities on the territory of Bulgaria (265 in total) responsible for the management and collection of municipal waste on their territory. |
| Statistical concepts and definitions | “Municipal waste” are:
a) Mixed or separate collected municipal waste from household including paper and cardboard, glass, metals, plastics, bio-waste, wood, textiles, packaging, waste from electrical and electronic equipment, waste from batteries and accumulators, as well as bulky waste, including mattresses and furniture;
b) mixed waste or separately collected waste from other sources, where such waste is similar in nature and composition to municipal waste Municipal waste does not include waste from production, agriculture, forestry, fishing, septic tanks and sewage network and treatment, including sewage sludge, end-of-life motor vehicles or construction and demolition waste. Generated municipal waste" is a summary indicator that characterizes the level of municipal waste. It is calculated as the sum of: (1) the quantities of municipal waste collected through organized waste collection systems, (2) the quantities of municipal waste collected through systems other than organized waste collection (primarily recyclable materials, such as metal, paper, plastic, and others, which are collected at specialized sites for the purpose and subsequently transferred directly for recycling), and (3) a statistical assessment of the waste generated by the population not covered by organized waste collection systems. The calculation approach is standard and applies to all districts in the country. The municipal waste delivered for preliminary treatment, recycling and direct disposal are the waste at the entrance of the respective installation for treatment of municipal waste. To avoid re-counting the amount of waste - directly disposed municipal waste does not include waste submitted for disposal after pre-treatment. "Municipal waste generated per person (municipal waste accumulation rate)" is the amount of municipal waste generated at national level divided by the average annual population for the relevant year. Definitions are used in accordance with the applicable legislation - Waste Framework Directive (Directive 2008/98/EC) and Directive (EU) 2018/851 amending Directive 2008/98/EC on waste. |
| Statistical unit | The statistical unit is municipality. |
| Statistical population | All municipalities in the country. |
| Reference area | General for the country and by territorial levels - statistical districts and regions. |
| Time coverage | 1999-2023 |
| Base period | Not applicable. |
| Statistical processing | |
| Source data |
|
| Frequency of data collection | Annually |
| Data collection | Data is collected from municipalities across the country on:
|
| Data validation | Data validation is part of the activities to ensure the quality of statistical information. Primary data are validated in terms of completeness, correct classification, units of measurement, comparability with previous years, comparability with data from other statistical areas and/or administrative sources, logical control, etc. Statistical data are validated in terms of their comparability, accuracy, reliability, etc., in accordance with the quality criteria according to the Statistics Act. |
| Data compilation | Data processing is carried out by strictly applying the methodology of the study and the data verification methods. Data processing includes the actions by which, based on the primary data, brought into an appropriate form, statistical data are calculated, using specialized software products for this purpose. |
| Adjustment | Not applicable. |
| Quality management | |
| Quality assurance | Data quality is ensured by applying the principles of the European Statistics Code of Practice and the National statistical system’s Common Framework for Quality Management, including with application of the internal methodology "Environmental Statistics and Accounts”, developed by the NSI. The assessment of the statistical data quality is carried out in order to ensure compliance with the requirements of the Statistics Act in terms of quality criteria: adequacy, accuracy, timeliness, punctuality, accessibility and clarity, comparability and logical consistency. In this way, the application of the following principles of the European Statistics Code Practice is guaranteed: appropriate statistical procedures; non-excessive respondents’ burden; cost-effectiveness; relevance; accuracy; timeliness and punctuality; comparability and coherence; accessibility and clarity, etc. |
| Quality assessment | The quality assessment is carried out for every stage of statistical production process in accordance with NSS Common Framework for Quality Management and the principles of the European Statistics Code of Practice. It’s include statistical process and statistical information. For the quality assessment the requirements of the current methodological documents are applied, including the instructions in the internal methodology "Environmental Statistics and Accounts”, developed by the NSI. To ensure high quality of the data, their consistency with administrative data of the Executive Environment Agency is checked. In order to ensure data quality, work is also being done to continuously improve the online-based information system for the collecting of primary data, providing the possibility of arithmetic and logical control of input data and performing additional analyses and checks. |
| Relevance | |
| User needs | The main users of statistical information from the survey are state and municipal structures, scientific institutes, associations and citizens. |
| User satisfaction | NSI conducts a regular statistical survey "User Satisfaction with the Statistical Information Products and Services Provided", which covers all statistical areas. It aims to assess user satisfaction with the statistical information provided by the NSI and to define recommendations for the future development of the statistical system in accordance with user needs. |
| Completeness | The data meet the requirements of applicable legislation in terms of scope and monitored indicators. |
| Data completeness - rate | High |
| Accuracy and reliability | |
| Overall accuracy | Data accuracy, as one of the criteria for the quality of statistical information, according to the Statistics Act, is guaranteed through quality assurance activities within the statistical production process. |
| Sampling error | Not applicable. |
| Sampling errors - indicators | Not applicable. |
| Non-sampling error | Not applicable. |
| Coverage error | Not applicable. |
| Over-coverage - rate | Not applicable. |
| Common units - proportion | Not applicable. |
| Measurement error | Not applicable. |
| Non response error | Not applicable. |
| Unit non-response - rate | Not applicable. |
| Item non-response - rate | Not applicable. |
| Processing error | Not applicable. |
| Imputation - rate | Not applicable. |
| Model assumption error | Not applicable. |
| Seasonal adjustment | Not applicable. |
| Data revision - policy | In accordance with the principles of the European Statistics Code of Practice, Integrated system management in NSI and the requirements of the internal rules, data are regularly monitored and revised as necessary. Revisions are carried out according to standard, established and transparent procedures and are regularly analysed with the aim of improving data sources, statistical processes and products. |
| Data revision - practice | The data is revised upon change in regulatory requirements, the applied methodology, or when necessary. |
| Data revision - average size | Not applicable. |
| Timeliness and punctuality | |
| Timeliness | The data are published 14 months after the reporting year. |
| Time lag - first results | Not applicable. |
| Time lag - final results | Not applicable. |
| Punctuality | The data are published according to the deadlines in the Release calendar of result of statistical surveys by NSI. |
| Punctuality - delivery and publication | Not applicable. |
| Coherence and comparability | |
| Comparability - geographical | The data are comparable at the district, regional, and zone levels. Given the application of common definitions and classifications, the data are comparable at the national level with other EU countries. |
| Asymmetry for mirror flows statistics - coefficient | Not applicable. |
| Comparability - over time | The data are comparable over time. Time series are available from 1999. |
| Length of comparable time series | 1999-2023 |
| Coherence - cross domain | The data are coherence with data from Demographic Statistics for population by settlements Classification is applied according to Classification of territorial units for statistics in Bulgaria (NUTS) |
| Coherence - sub annual and annual statistics | Not applicable. |
| Coherence - National Accounts | Not applicable. |
| Coherence - internal | The data have a high degree of internal coherence. The quality assessment procedure checks the consistency of the primary and statistical data by waste code, the aggregated and detailed data. |
| Accessibility and clarity | |
| News release | Regular press release on the NSI’s website. |
| Publications |
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| On-line database | The data on municipal waste are available on the NSI’s website: |
| Data tables - consultations | Not applicable |
| Micro-data access | Individual anonymized data may be provided for scientific and research purposes according the Rules for Provision of Anonymised Individual Data for Scientific and Research Purposes of the NSI. |
| Other | Information services at the request of users according Rules for Dissemination of Statistical Products and Services of the NSI. |
| Metadata - consultations | Not applicable |
| Documentation on methodology |
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| Metadata completeness – rate | The data meet the requirements of applicable legislation in terms of scope and monitored indicators. |
| Quality documentation |
The quality report is published annually with the publication of statistical data |
| Cost and burden | |
The costs (budget) for statistical surveys are disclosed in the National Statistical Program, published on the NSI website. Reducing the burden on respondents is a priority in conducting statistical surveys. In this regard, actions are being taken to alleviate the burden, for example: collecting and checking primary data through the online-based information system "Environmental Statistics", containing strict arithmetic and logical controls; improving the instructions for filling of the survey forms; providing methodological and technical assistance; continuously exploring the possibilities for using information from administrative and other sources; conducting annual training for respondents and NSI’s experts, etc. The time needed to fill in the statistical forms is used as the main measure of the burden on respondents. For this purpose, a section is included in each form that respondents must fill in, regarding the time needed to fill in the form (including the time for data preparation). Based on this information and given the specifics of the study, the burden of the respondents can be determined as relatively high. The overall burden of the responsible experts is determined as high, especially in cases of revisions of data from previous reporting periods. | |
| Confidentiality | |
| Confidentiality - policy | Regulation (EC) No 223/2009 on European statistics foresees the need to establish common principles and guidelines ensuring the confidentiality of data used for the production of European statistics and access to such confidential data, with due regard to technical developments and the requirements of users in a democratic society. The Statistics Act (Art. 25, para. 1) stipulates that individual data received and collected in statistical surveys are statistical secret and may be used only for statistical purposes. |
| Confidentiality – data treatment | According to Art. 25 of the Statistics Act, individual data shall not be disclosed or provided. The provision of individual data is possible only according to Art. 26 of the Statistics Act. |
| Comment | |
