1. Water indicators Data collection, analysis, reporting - Serbian Experience
Milijana Ćeranić - Statistical Office of the Republic of Serbia
Dejan Lekić - Serbian Environmental Protection Agency
UNECE, Geneva 13 May 2014

2. Water supply / sanitation indicators
Bylaw on the National list of environmental indicators adopted in 2011
81 indicators in total / 11 water related indicators
5 indicators directly related to the water supply and waste water
3 additional indicators within sustainable use of natural resources

3. Indicators Water indicators: Sustainable use indicators
Drinking water quality
Population connected to public water supply
Population connected to public sanitation
Urban waste water treatment
Polluted (non-treated) wastewaters
Sustainable use indicators
Household water use per capita
Water losses
Renewable freshwater resources

4. Data Collection Statistical Office of the Republic of Serbia
Public Health Institutes
Water Directorate
Local water supply and sewage public companies

5. Environmental Information System – Eionet Serbia5

6. Environmental Information System – Future6

7. Populatin connected to water supply Populatin connected to wastewater treatment
Survey on Public water supply and Survey on urban wastewater as part of Water statistics - Environmental statistics.
Conducted in line with Law on Official Statistics (“Official Gazette of RS”, No 104/2009), Official Statistics Strategy (establish for 5 year) and Annual Statistical Programme.
Obligation to provide data
The obligation to provide data is laid down in Article 26 and the penalty provisions relative to the refusal of providing data or providing incomplete and false data in Article 52 of the Law on Official Statistics (“Official Gazette of RS”, No 104/2009).
Obligation to protect individual data
Results of the survey are published as aggregates, taking into account the obligation to protect individual data according to the Law on Official Statistics. 7 7

8. Drinking water Agriculture IRIGATION Waste water treated processis
Water statistics
-abstracted
-using
-treated
-wastewater
Drinking water
-housholds
-industry
-institutions
Water use in
INDUSTRY
Agriculture
IRIGATION
-LIVESTOCK’s USE
Waste water
treated
Industrial
processis
Cooling water 8 8

9. SURVEY ON DRINKING WATER SUPPLY
Survey on drinking water supply provides data which are classified into three topics:
Water abstraction (from rivers and underground water) included overtaken water from other networks and water provided to other systems;
Water distributed to users: households, business entities dealing with the sections of Agriculture, forestry and fishing, Mining and quarrying, Manufacturing and Electricity, gas, steam and air conditioning supply, Water supply; sewerage, waste management and remediation activities, as well as to other consumers, water used for own consumption, and total water loss;
Data on water treatment, water supply network and costs of drinking water production. 9

10. SURVEY ON URBAN WASTEWATER
Objective of conducting the survey on urban wastewater is to provide the data on:
Quantities of wastewater discharged in the recipient
Quantities of discharged treated and untreated wastewater
Devices for wastewater treatment
Biological and chemical oxygen demand and quantity of heavy metals in wastewater
Sewerage system/ network. 10

11. List and definitions of main items – indicators
Public water supply is a system for drinking water supply, having arranged and protected source, abstraction, reservoir and water network and presents a set of connected hydro-technical components under singular management and control, used for water abstraction, collection, treatment and distribution to consumers.
Water abstraction (sources) refers to all the places of public underground or surface waters from which water supply systems are supplied (underground, surface waters, spring waters, watercourses, accumulations and lakes).
Distributed water relates to all directly abstracted and supplied water distributed by the water supply system during the reference year to its consumers. The quantities of distributed water are measured by water gauge or, where they are not available, quantities are calculated according to norms relative to a selected activity group.
Drinking water is water used for drinking, processing and production of food and general use items, as well as for other people’s needs. Water used or intended for drinking must not contain elements harmful for human’s health above the determined limits and regarding physical, chemical, biological, bacteriological, virological and radiological features, it has to satisfy the established conditions. 11

12. DEFINITIONS– UNSD/UNEP QUESTIONNAIRE 2013 ON ENVIRONMENT STATISTICS
Total population supplied by water supply industry (ISIC 36)- Percentage of the total resident population using water supplied by the water supply industry (ISIC 36).
Urban population supplied by water supply industry (ISIC 36) - Percentage of the urban resident population using water supplied by the water supply industry (ISIC 36).
Rural population supplied by water supply industry (ISIC 36) - Percentage of the rural resident population using water supplied by the water supply industry (ISIC 36). 12

13. DEFINITIONS– UNSD/UNEP QUESTIONNAIRE 2013 ON ENVIRONMENT STATISTICS
Population connected to wastewater collecting system - Percentage of the resident population connected to the wastewater collecting systems (sewerage). Wastewater collecting systems may deliver wastewater to treatment plants or may discharge it without treatment to the environment.
Population connected to wastewater treatment - Percentage of the resident population whose wastewater is treated at wastewater treatment plants.
Population with independent wastewater treatment (e.g., septic tanks) - Percentage of the resident population whose wastewater is treated in individual, often private facilities such as septic tanks.
Population not connected to wastewater treatment - Percentage of the resident population whose wastewater is neither treated in treatment plants nor in independent treatment facilities. 13

14. Reporting units, statistical units
Data on water use in settlements are collected from all business entities that collect, distribute water and/or manage the systems for water use and data on wastewater and treated water are collected from the reporting units managing the sewerage systems.
Activity of these reporting units is, according to the Classification of Activities, defined in the division 36 – Water collection, treatment and supply and division 84 – Public administration and defense, compulsory social security (local communities’ authorities managing water supply systems). (ISIC and NACE Rev.2)
Survey coverage
The survey covers all business entities that perform their activity on the entire territory of the Republic of Serbia. 14

15. Method, time and sources for data collection
Data collection is done by the reporting method, meaning that the reporting unit uses its available documentation and records to fill in the questionnaires. The competent person enters the requested (existed or estimated data) for the previous year. The reporting unit forwards the questionnaire to the relevant statistical authority on which territory its head office is located within the deadline set up in the annual plan. 15

16. Level of data representatives (territorial)
The data are representative for the territory of the Republic of Serbia
Regions
Divisions
Municipalities
As well by river basins:
Danube
Sava
Morava 16

17. Harmonization with international recommendations, standards and practice
The methodology relative to this survey is harmonized with international recommendations and standards:
Water Framework Directive, WFD /60/EC;
JQ OECD/Eurostat – Inland water;
Questionnaire REQ12 – Regional Environmental Data Collection - Inland water;
JQ UNSD/UNEP – Environmental Statistics. 17

18. SURVEY TOOLS
Questionnaire and instructions for filling the questionnaire
For conducting the survey on drinking water supply, used is the Questionnaire “Annual survey on drinking water supply, (VOD – 2v)” and “Annual survey on urban wastewater (VOD-2k), with the instructions for completing it.
Electronic form of the questionnaire with the instructions is also available on SORS website:
Methodologies (
List of nomenclatures and classifications used in the survey
• Code list of watercourses
• Classification of Activities (CA – 2010, “Official Gazette of RS”, No 54/10)
• Regulation on Nomenclature of Statistical territorial Units (“Official Gazette of RS”, No 109/09 and 46/10).
All documents are available on SORS website: 18

19. Average price of water distributed with VAT, in RSD / m3
Table 2 Water distribution and losses
Sequen ce number
Number of:
Water quantity,
thous. m3
Average price of water distributed with VAT, in RSD / m3 1 2 3
Total distributed water (2+7)
 xxxxxxxxxxx 
Total water sold to: ( )
xxxxxxxxxxx
Households
 xxxxxxxxxxx 4
Enterprises dealing with: agriculture, forestry and fishing 5
Industry enterprises 6
Other consumers: schools, institutions, stores, hospitals, hotels, etc. 7
Water for own consumption 8
of which: sanitary water 9
Total water losses 19

20. Table 3 Water treatment, water supply network, users and costs for the production of drinking water
Sequen ce number
Number of:
Water quantity,
thousend m3 1 2
... 32
Number of water connections pipes
 xxxxxxxx 35
Number of households connected to water supply network 36
Population connected to water supply network - NEW 20

21. Average price of wastewater with VAT, in RSD / m3
Wastewater discharged in water bodies
Seq. number
Number of:
Water quantity,
thous. m3
Average price of wastewater with VAT, in RSD / m3 1 2 3
Wastewater discharged -total
 xxxxxxxxxxx 
- Untreated water
xxxxxxxxxxx  
xxxxxxxxxxx
-Treated water
 xxxxxxxxxx 4
Primary treatment (physical/ chemical) 5
Secondary treatment (physical/ biological) 6
Tertiary treatment (physical/chemical/ biological) 7
Wastewater discharged - from household 8
Number of households connected to the wastewater collecting system 9
Population connected to the wastewater collecting system (NEW) 10
Number of households with septic tanks 21

22. Table 6 - List of all settlements covered by the public water supply and urban wastewater collecting systems
Name of the settlement
Number of households connected to public water supply 
Total distributed water thous. m3
Number of households connected to urban wastewater coll. system
Total wastewater discharged thous. m3
NAME 1 N1
 MMM
 N2 >= N1
  VVV <MMM
... 22

23. Population connected to public water supply
2012
Number of households (Census 2011)
Hauseholds connected to public water supply by survey (VOD2) %
Nu. of occupied dwellings with (Census 2011)
Estimation/ Hauseholds connected to public water supply  %
Average number of households members
Estimation/ Population connected to public water supply 1 2 3 4
R Serbia
88.42
81.76
2.88
Serbia - North
103.63
91.91
2.75
Belgrade
606433
659815
108.80
547321
562547
92.76
2.73
-Belgrade
Vračar3)
539483
606593
112.44
476632
509325
94.41
2.23
Lazarevac
18862
11782
62.46
11978
3.11
36 642
Mladenovac
17512
12180
69.55
10085
3.01
36 662
Obrenovac
23712
23359
98.51
18622
3.04
71 011
Sopot
6864
5901
85.97
3578
2.97
17 526
Vojvodina
696157
690020
99.12
531821
634628
91.16
2.76
West Bačka
68888
67819
98.45
38398
63063
91.54
2.72
-Apatin
10772
11062
102.69
7758
10161
94.33
2.67
27 130
... 23

24. Population connected to wastewater systems /WWT
 2012
Number of households connected to WW system by Survey
Number of households (Census 2011) %
/Estimation/ Households connected to WWT  %
Average number of households members
Estimation/ Population connected to WWT
R Serbia
58.43
58.64
2.88
Serbia - North
862308
66.20
2.75
Belgrade
518586
606433
85.51
2.73
-Belgrade
Vračar3)
490063
539483
90.84
2.23
Lazarevac
8269
18862
43.84
3.11
25717
Mladenovac
8370
17512
47.80
3.01
25194
Obrenovac
11300
23712
47.66
3.04
34352
Sopot
584
6864
8.51
2.97
1734
Vojvodina
343722
696157
49.37
2.76
948673
West Bačka
18421
68888
26.74
2.72
50105
Apatin
6100
10772
56.63
2.67
16287
... 24

25. Population connected to WWT
2012
Population connected to wastewater collecting system
Population connected to wastewater treatment
Population connected to primary treatment
Population connected to secondary treatment
Population connected to tertiary treatment
R Serbia
783637
110914
596793
97549
Serbia - North
266373
29741
166763
90482
Belgrade
-Belgrade
Vračar3)
Lazarevac
25678
Mladenovac
25179
Obrenovac
34401
Sopot
1732
Vojvodina
949405
268023*
29925
167797*
91043*
-West Bačka
50145
20509
20441
Apatin
16274 25

26. Key issues and challenges - statistics
Data sources
All Public water supply and sewerage systems are included;
Data availability
Some data is not available.
Time series
Survey has been conducted more than 50 years.
Problems existing with data collection:
Lack of educated people responsible to fulfilling questionnaires.
Unpaid (from users) distributed water, often has been presented as losses. 26 26

27. Key issues and challenges
Losses presented as total (by transport and by leakage)
Number of households identified as Number of pipe (water) connections
Measurement units often wrong
Estimations depend of experts.
Comparability and validation data
Across countries, Region
Reporting to Eurostat and UNSD 27

28. Challenges – EPA Better data collection procedures
Improved quality assurance
Increased monitoring frequency
Integration of local, regional and national information systems – SEIS concept applied
Building capacity on all levels
Better financial instruments

29. Outputs Percentage of population connected to public water supply
Water losses 29

30. Outputs Percentage of population connected to public sewage systems
Water Treatment Index 30

31. Thank you for your attention!