Water Supply, Sewerage and Watercourses
Commentary | Contents |
The publication presents information processed from the questionnaire VH 8b-01 – the annual questionnaire on public water supply and sewerage systems for the year 2005, which remained unchanged compared to the previous year as well as its processing at the Nationwide Data Processing Department České Budějovice. Data in the statistical return were provided by 1,697 respondents, i.e. 234 operators of water supply and sewerage systems and a sample of 1,463 municipalities of the Czech Republic that operate public water supply and sewerage systems on their own.
To make the grossing up method more precise, we used results of a survey, in which we asked municipalities whether they have public water supply system and public sewerage system and which entity operates the systems. The data returned from 4,200 municipalities that were addressed. The Nationwide Data Processing Department thus wanted to reduce duplicities, which distort processing results. The second year of using the model of the mathematical statistical grossing-up procedure made us understand that it is necessary to determine an unambiguous survey methodology for obtaining data from operators of water supply and sewerage systems.
Published results are calculated from values, which were not rounded and are shown for the Czech Republic in total, broken down by territory NUTS 3 (regions) or NUTS 2 (areas).
Part A – Data on water supply and sewerage systems for the year 2005 – includes data grossed up to the Czech Republic in total, broken down by region (NUTS 3). Data for wastewater treatment plants (WWTPs) and sewage sludge are not imputed.
By comparing the results from publications in time series we get a grasp of development trends.
In Part 1 – Water supply systems – Percentage of the population supplied with water from water-supply systems is increasing compared to the mid-year population approximately by 0,2% - 2% a year; the year-on-year index for 6 years (2000 – 2005) is 104,7. For the last two years observed, the annual index reached 100,3, which is an increase by about 30 thousand inhabitants. An increasing tendency is observed also for the indicators of Length of water-supply systems, Number of installed water meters and Number of water connections. Indices of the last two indicators mentioned are increasing almost in the same way.
On the other hand, what has a year-on-year gradually decreasing tendency are data on Production of drinking water for implementation (decrease by almost 1 point a year) and a similar drop is reported also for Total water invoiced. On the contrary, regularly increasing is Water rate, total (the rate is about 1 CZK per m3 up; in 2005 it reached 22.45 CZK per m3, in 2000 it was 17,46 CZK per m3).
The total specific consumption of drinking water per inhabitant of the CR and day decreased in the year 2005 to 155,3 litres per day (in 2004 it was 159.3 l per day) and the specific consumption per household member and day decreased to 98.9 litres per day (in 2004 it was 102.4 l per day).
In Part 2 – Sewerage systems – the figure of Population living in houses connected to sewerage systems has an increasing tendency; for the last six years, the index 05/00 is 104,7. The index 05/04 is 101,9, which is an increase by 152 thousand people. What is also increasing is Number of sewerage system connections and their length as well as Waste water discharged into sewerage systems, which increased in comparison to the previous year by 3,682 thousand m3. Regularly increasing are sewerage collection charges (by 5 CZK per m3 for the last six years); now it is 18.14 CZK per m3.
Part B - Aggregates on water supply and sewerage systems for the year 2005 – shows selected data for the entire Czech Republic processed by area (NUTS 2).
Final part of the publication (Tables C to H) includes data from the VH 8a-01 annual questionnaire on watercourses, surface water supplies and waterworks under the management of 5 state-owned enterprises Povodí, Forests of the CR, Agricultural Water Management Authority (AWMA) and Prague City Hall. An extended survey on waterworks is carried out every five years.