Unrevised figures are published 15 March each year.
Key figures are published 15 June each year.
Revised figures published annually in Today’s statistics.
Municipality (for all municipalities, with average figures for municipality-groups, counties and country without Oslo) from 2001. Before 2001, municipalities every third year, national figures.
220 - Division for Environmental Statistics
The financial data are collected by authority in Local Government Act §49. Information regarding waste and systems for removal of refuse are collected by authority in the Pollution Control Act Section §49 and adapted to statistics after Statistics Act Section §3-2.
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The KOSTRA-project started in 1995 as a project with four municipalities as participants. The numbers of municipalities and county municipalities were gradually increasing up to 2001, which was the first year when all municipalities and county municipalities were included.
The purpose is to coordinate and make all the reporting from the municipalities to the state more effective, and give better information about the municipalities’ activity to both central and local governments. KOSTRA is based on electronic reporting from the municipalities to SSB, and also on data from a sequence of other sources inside and outside SSB. The KOSTRA-publishing is mainly based on combination of data from several sources, e.g. accounts data, service- and personnel data and population data. During the project period many of the old areas for statistics have been changed, and new areas added.
The objective with statistics on household waste is to give a better overview and knowledge about amounts and flow of waste in Norway, and the systems for waste management in the municipalities.
The KOSTRA key figures are presenting average amount of household waste and the amount of sorted waste pr. inhabitant for each municipality. In addition, key figures for the possibilities for sorting of household waste in each municipality are established.
At level 3 in KOSTRA total amounts for household waste are calculated and shown. Sorted waste is split into recyclable fractions and the residual waste is split into ways of handling and disposal.
Data for the entire country is published since 1992. Data for municipalities were published every third year until 2000. Since 2001 all the municipalities are reporting annually on waste management via KOSTRA. The amount of waste by municipality is annually since 2001; data collected partly from KOSTRA and partly by direct input from inter-municipal waste companies.
Before 2001 the statistics was named ‘Municipal waste’, and covered waste from service industries which was handled by the municipalities. From 2001 waste from service industry is taken out and the statistics is named Household waste.
KOSTRA provides information on municipalities and county municipalities, and is used by inhabitants, media, central and local governments.
For household waste central users are The Norwegian Pollution Control Authority (SFT), Ministry of the Environment, county departments of environmental affairs and organisations.
From 2001, annual full coverage survey including household waste only. Before 2001 full coverage survey every third year, and sample survey the years in between; which also included waste from service industry.
Municipalities and inter-municipal waste companies are reporting via KOSTRA.
Starting 2001; all municipalities and inter-municipal waste companies.
1999 and 2000: 25 inter-municipal waste companies, 13 municipalities with more than 30 000 inhabitants, and 12 municipalities with less than 30 000 inhabitants. 140 of in total 435 municipalities were represented in the selection.
1996 and 1997: 53 municipalities divided in 4 strata: 1 – the ten municipalities with highest population, 2 – the rest of the city municipalities, 3 – other municipalities weighing the waste, 4 – the rest of the municipalities.
1993 and 1994: 47 municipalities stratified in the same way as in 1996 and 1997.
Data from municipalities and inter-municipal waste companies reported to KOSTRA by 15 February.
Data are controlled prior to sending by controls in the electronic questionnaire and control programs for file-extracts. Data are controlled for obvious errors and checked against country average and last year’s values.
The municipalities have to respond by 15 April to report revised data after the publishing 15 March, and revision of data is in addition performed by SSB in cooperation with the municipalities. Commencing 2003, SSB’s control- and revision system in KOSTRA for revision of waste data. All revision must be completed and final data published by 15 June.
All municipalities have provided information on waste management by KOSTRA. The municipalities that do not take part in inter-municipal waste companies are reporting waste data via KOSTRA, whereas waste data from the municipalities that take part in inter-municipal waste companies is reported by the waste company. The amount of waste for each municipality is calculated based on inhabitants and adjusted for vacation homes. This calculation may lead to common figures for neighbour municipalities that take part in the same system for waste collection.
The reported data are adjusted for eventual mix with waste from service industry and waste that are delivered directly from households to waste treatment plants. The directly delivered waste is added, and waste from service industry is taken out from the figures.
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Household waste:
Waste coming from normal activities in households (food residuals, packaging material, paper, furniture etc.), including large objects.
Sorting for recycling is understood as waste that is sorted in households or at the waste disposal area. After sorting, the waste can go to material recovery, composting, burning with energy recovery or used as filling compounds. As an outcome from this treatment there might be a rest that in most cases is sent to landfill. Waste from waste treatment is calculated as waste from service industry.
The 433 municipalities are divided in to 16 groups, after population and financial regulating framework. The grouping is based on Langørgen, A., R. Aaberge og E.R. Åserud (2001): Grouping of municipalities after population and financial regulation framework 1998. Reports 2001/35, Statistics Norway.
At publishing 15 March the data are checked by electronic controls only. These controls do not cover for all types of errors, and item non-response error may happen. This will result in errors in the published figures because the data is not complete. Other types of errors can also occur in the municipalities reporting.
At the publishing 15 June the figures are verified both by the municipalities and SSB.
The quality of the figures for household waste is improved. An increasing part of the waste is weighed at receipt at the waste treatment plants, and the definitions in the waste statistics is gradually well known in the municipalities.
The amount of waste from service industry in household waste is adjusted, but can still give some uncertainty. This is also applicable to waste from households that are delivered directly to the waste handling areas.
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The statistics is based on full count.
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The publishing in KOSTRA covers figures from 1999, starting at the time when the municipalities joined KOSTRA. In the project period for KOSTRA there has been several changes in the statistics system, which has resulted in some time series breaks.
For household waste, 2001 is the first year with key figures for all municipalities in KOSTRA.
The statistics is comparable with equivalent data back to 1992.
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As key figures in KOSTRA and Municipal waste
The statistics are published electronically as Today's Statistics on Statistics Norway's website. The full survey collections in 1992, 1995 and 1998 were published in the series Norges offisielle statistikk (NOS), Waste statistics.
Some of the results are also published in Statistical Yearbook of Norway.
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