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In Slovenia in 2011, 89% of the population was supplied with drinking water from drinking water supply systems, which were monitoring regarding the quality of drinking water at the point of use, which is the tap of the user. The quality of drinking water is unknown for about 11% of the Slovenian population; they are supplied from its own resources of water (individual drinking water systems) or from systems supplying less than 50 persons, or from systems not included into the monitoring for any other reason. In cities, all residents are supplied with monitored drinking water.


The indicator shows the number and percentage of inhabitants of the Republic of Slovenia, who are supplied with drinking water from drinking water supply systems that were included in drinking water monitoring in the period 2004-2007 or in internal quality control in the period 1998-2003. The drinking water supply system represents a supply area, which can be subdivided into several smaller units or supply zones.

A supply zone is a geographically defined within which water intended for human consumption comes from one or more sources and within which water quality may be considered as being approximately uniform. The Rules on Drinking Water classifies in Slovenia supply areas in categories by size, which are classified into small, mid and big areas with regard to the number of inhabitants supplied with drinking water (50-1000, 1001-10.000 and >10.000 inhabitants).


Charts

Figure ZD05-1: Percentage of the Slovenian population supplied with drinking water by size of the supply zone and residents without monitoring, 2004-2011
Sources: 

The database on drinking water supply systems and on the compliance of drinking water, National Institute of Public Health of the Republic of Slovenia, Monitoring on Drinking Water 2004-2010

Show data
2005 2006 2007 2008 2009 2010 2011
50-500 No. 120712 115467 115692 111761 110155 104785 103307
501-1.000 No. 63495 63881 65618 73197 74009 79237 75845
1.001 - 5.000 No. 249602 252175 249523 248623 236644 241403 231986
5.001 - 10.000 No. 233540 229876 220533 236392 227033 218627 358774
10.001 - 20.000 No. 334488 323988 334102 369044 381635 396784 306982
20.001 - 50.000 No. 403647 431688 481406 373443 324145 324145 246601
50.001 - 100.000 No. 292000 292000 241000 300494 353743 353774 406507
> 100.000 No. 137000 137000 137000 104600 104600 104600 104600
without supervision No. 166630 162441 174532 205075 230371 225906 217894
50-500 % 6 6 6 6 5 5 5
501-1.000 % 3 3 3 4 4 4 4
1.001 - 5.000 % 12 13 12 12 12 12 11
5.001 - 10.000 % 12 11 11 12 11 11 17
10.001 - 20.000 % 17 16 17 18 19 19 15
20.001 - 50.000 % 20 21 24 18 16 16 12
50.001 - 100.000 % 15 15 12 15 17 17 20
> 100.000 % 7 7 7 5 5 5 5
without supervision % 8 8 9 10 11 11 11
Figure ZD05-2: Number of supply zones by size and the population served, 2004-2011
Sources: 

The database on drinking water supply systems and on the compliance of drinking water, National Institute of Public Health of the Republic of Slovenia, Monitoring on Drinking Water 2004-2010

Show data
2005 2006 2007 2008 2009 2010 2011
50-500 No. 721 692 697 695 688 669 635
501-1.000 No. 90 90 91 102 102 113 109
1.001 - 5.000 No. 109 111 111 110 105 108 33
5.001 - 10.000 No. 32 32 31 33 33 32 5
10.001 - 20.000 No. 24 23 24 26 27 28 11
20.001 - 50.000 No. 14 15 16 13 12 12 111
50.001 - 100.000 No. 4 4 3 4 5 5 28
> 100.000 No. 1 1 1 1 1 1 1
No. 995 968 974 984 973 968 933
Figure ZD05-3: Percentage of the Slovenian population, included in the monitoring of drinking water quality, by size of the supply zone and residents without monitoring, by regional Public Health Institutes, in 2010
Sources: 

The database on drinking water supply systems and on the compliance of drinking water, National Institute of Public Health of the Republic of Slovenia, Monitoring on Drinking Water 2004-2010

Show data
Slovenija Celje Koper Kranj Ljubljana Maribor Murska Sobota Nova Gorica Novo mesto Ravne na Kor.
small (50-1000) % 9 13 3 10 7 4 18 16 10 17
medium (100-10.000) % 22 23 2 25 21 14 24 33 37 60
big (>10.000) % 58 42 86 57 63 79 43 41 44 -
without supervision % 11 22 9 8 10 3 15 10 10 23
Figure ZD05-4: Number of supply zones and the population served by type of raw water in 2011
Sources: 

The database on drinking water supply systems and on the compliance of drinking water, National Institute of Public Health of the Republic of Slovenia, Monitoring on Drinking Water 2010

Show data
Slovenija Celje Koper Kranj Ljubljana Maribor Murska Sobota Nova Gorica Novo mesto Ravne na Kor.
small (50-1000) % 9 13 3 10 7 4 18 16 10 17
medium (100-10.000) % 22 23 2 25 21 14 24 33 37 60
big (>10.000) % 58 42 86 57 63 79 43 41 44 -
without supervision % 11 22 9 8 10 3 15 10 10 23

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