KAZALCI OKOLJA

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Key message
Neutral

In recent years, the amount of wastewater treated by secondary or tertiary treatment processes increased, while primary treatment processes have closed. The amount of wastewater treated through secondary treatment processes increased by 118 % since 2002 or from 38 million m3 (in 2002) to almoust 46 million m3 (in 2018). There were almost no tertiary wastewater treatment processes in Slovenia in 2002, and in 2018, 72% of wastewater or 116 million m3 of wastewater was treated by tertiary process.


This indicator shows the quantity of industrial and municipal/urban wastewater and the share of population whose wastewater is treated in municipal/urban and combined wastewater treatment plants classified according to the level of treatment under the methodology determined in the Urban Waste Water Treatment Directive. This methodology was also adopted in the Slovenian Decree on the Emission of Substances in Waste Water Discharged from Urban Waste Water Treatment Plants (OJ RS No 35/96, 90/98, 31/01, 62/01, 41/2004-ZVO-1). In general terms, primary treatment is mechanical and/or chemical. It includes removal of settleable organic and inorganic solids by sedimentation and removal of materials that float (scum) by skimming. Secondary treatment is biological. It removes most organic matter and 20–30% of nutrients. Tertiary treatment removes (apart from organic matter) most nutrients (nitrogen, phosphorus).


Charts

Figure VD02-1: Share of Slovenian population whose urban waste water was treated, in individual years, in urban or common waste water treatment plants of a certain treatment level
Sources: 

Waste Water Treatment Plants Database, Environmental Agency of the Republic of Slovenia, 2020; Statistical Office of the Republic of Slovenia, 2020

Show data

primary[%]

secondary[%]

tertiary[%]

primary[number]

secondary[number]

tertiary[number]

population - total[number]

1998

27.51

11.42

1.47

545399

226341

29079

1982603

1999

25.02

13.73

1.94

497575

273098

38623

1988887

2000

26.73

11.85

1.88

531953

235893

37446

1990272

2001

24.18

15.99

1.40

481660

318592

27810

1992035

2002

21.96

19.14

1.38

438320

382055

27624

1995718

2003

21.96

19.92

1.50

438513

397844

29911

1996773

2004

20.94

23.10

8.74

418112

461325

174564

1997004

2005

19.61

22.53

12.31

392319

450909

246364

2001114

2006

3.85

39.65

12.34

77375

796417.80

247859

2008516

2007

3.79

39.92

12.71

76632

806153

256639

2019406

2008

1.31

41.27

13.81

26580

834764.60

279240

2022629

2009

0.45

39.62

16.76

9264

809213.60

342343

2042335

2010

0.46

40.08

17.47

9506

821363.80

357965

2049261

2011

0.46

40.25

18.48

9350

826115.80

379269

2052496

2012

0.46

38.60

20.13

9395

793812

413943

2056262

2013

0.45

36.38

23.33

9350

749046.40

480481

2059114

2014

0.45

34.96

24.93

9264

720785.20

513871

2061623

2015

0

31.97

28.32

0

659550.60

584218

2063077

2016

0

29.93

35.69

0

617828.80

736723

2064241

2017

0

24.94

43.32

0

515371.20

894973

2066161

2018

0

24.21

44.08

0

501070

912468

2070050

Figure VD02-2: Quantity of waste water treated in urban or common waste water treatment plants of a certain treatment level
Sources: 

Waste Water Treatment Plants Database, Environmental Agency of the Republic of Slovenia, 2020

Show data

primary[1000 m3]

secondary[1000 m3]

tertiary[1000 m3]

1998

66151.33

25620.20

2801.33

1999

62145.95

33223.48

4308.74

2000

68076.81

30131.58

3370.87

2001

55558.45

33590.20

3092.81

2002

57903.69

38674.66

2748

2003

46980.96

38484.78

2633.08

2004

43996.79

48409.01

12744.28

2005

48536.02

45641.87

26656.19

2006

8779.24

72965.49

27932.59

2007

8035.17

77945.41

27209.49

2008

4560.30

90994.02

30693.96

2009

466.81

90124.35

41063.11

2010

457.62

98010.39

47192.61

2011

450.00

76962.45

42545.15

2012

433.37

82297.41

48225.55

2013

446.50

84355.51

65568.32

2014

434.50

78101.52

78043.75

2015

0

59527.85

73587.24

2016

0

57034.60

92501.12

2017

0

45311.92

104801.83

2018

0

45550.41

116458.40


Goals

 

  • To ensure protection of all surface and groundwater bodies on the territory of the Republic of Slovenia from organic pollution, nitrogen and phosphorus input and microbiological pollution.
  • To construct municipal wastewater treatment plants and sewer networks for all agglomerations specified in the Operational programme for the discharge and treatment of urban wastewater for the period 2005-2017.
  • To insure proper collection, discharge and treatment of urban wastewater by the end of 2021 with construction of small treatment plants for individual buildings in sensitive areas and by the end of 2030 in all other areas.

 

 

 



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