Water Quality in Slovenia - Agencija RS za okolje

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38 W A T E R Q U A L I T Y I N S L O V E N I A Table 9: The Classification of surface water intended for the abstraction of drinking water into quality classes based upon monitoring data in the years 1998 to 2006 Surface water intended for the abstraction of drinking water The first classification in 2002 Classification in quality classes on the basis of a five-year data set 1998–2002 1999–2003 2000–2004 2001–2005 2002–2006 Rižana A3 A2 A3 A3 A3 A3 Mrzlek A2 A2 A2 A2 A2 A2 Ljubija A2 - - - - A2 Malenščica A3 - - - - A2 Hudinja A1 - - - - A3 Bistrica A1 - - - - A2 Podroteja A2 A2 A2 A2 A2 A2 Soča A2 - - - - A3 Vipava A2 - - - - A2 Kolpa A2 - - - - A2 Veliki Obrh A1 - - - - A2 A1, A2, A3: quality classes from the best to the worse - Five-year data set is not available The results of the monitoring of the quality of surface water intended for the abstraction of drinking water show that surface sources of drinking water reach the quality of A1 class according to most physical and chemical parameters. Occasionally exceeded microbiological parameters were the reason for the classification of the surface sources Mrzlek, Podroteja, Ljubija, Bistrica, Kolpa, Vipava, Veliki Obrh and Malenščica into class A2. The Rižana has been classified into class A3 due to the occasional presence of Salmonella in water. Salmonella was also identified in one out of seven samples from the Soča, which consequently also caused the classification of the Soča into class A3. In the June 2006 sample from the Hudinja, the limit values of class A2 regarding total coliforms and faecal coliforms were exceeded, which classified the Hudinja into class A3. Regarding the first classification in 2002, the quality of the surface sources Rižana, Mrzlek, Podroteja, Ljubija, Kolpa and Vipava remained the same; the quality deteriorated in the soureces Hudinja (from A1 to A3), Bistrica (from A1 to A2), Soča (from A2 to A3) and Veliki Obrh (from A1 to A2), and it improved in the Malenščica (from A3 to A2). It has to be noted that the Hudinja is not a constant source of drinking water, because of its turbidity in the event of rainfall and is therefore used only in the dry season. The Veliki Obrh is also an auxiliary source of drinking water, as the majority of water is supplied from the well in Kozarišče while the Kolpa as a water source is gradually being phased out and a linkage of the water supply network to the Dobličica source is planned. Public Drinking Water Supply Contractors carry out an internal monitoring of the quality of the source of drinking water and are aware of microbiological pollutions. In the Ljubija and Bistrica, the use of ultrafiltration is therefore planned, to remove the suspended substances and particles of more than 0.01 μm in size and microorganisms, including bacteria and viruses from the water. Rižana spring Ljubija spring
S U R F A C E W A T E R S Map 5: Classification of the surface water intended for the abstraction of drinking water based upon the monitoring data in the years 2002 to 2006 39
Page 1: Water Quality in Slovenia
Page 4 and 5: ENVIRONMENTAL AGENCY OF THE REPUBLI
Page 7 and 8: Preface In recent years, people oft
Page 9: Contents PREFACE ..................
Page 12 and 13: 10 W A T E R Q U A L I T Y I N S L
Page 15 and 16: 2 Surface Waters 2.1 2.1.1 Quality
Page 17 and 18: Ledava, Čentiba Mura, Mota S U R F
Page 19 and 20: S U R F A C E W A T E R S Exceeded
Page 21 and 22: S U R F A C E W A T E R S In Table
Page 23 and 24: S U R F A C E W A T E R S RIVER Mon
Page 25 and 26: Map 2: Saprobic quality evaluation
Page 27 and 28: S U R F A C E W A T E R S Chart 6:
Page 29 and 30: Lake Bohinj Table 5: List of water
Page 31 and 32: S U R F A C E W A T E R S In the ye
Page 33 and 34: Lake Bled S U R F A C E W A T E R S
Page 35 and 36: S U R F A C E W A T E R S Table 8:
Page 37 and 38: S U R F A C E W A T E R S species a
Page 39: ��
Page 43 and 44: Soča, Čezsoča Nadiža, Robič Ba
Page 45 and 46: Map 7: Quality of bathing waters in
Page 47 and 48: S U R F A C E W A T E R S Compliant
Page 49 and 50: S U R F A C E W A T E R S Table 12:
Page 51 and 52: 2.4.4 Quality of Shellfish Waters S
Page 53: Strunjan S U R F A C E W A T E R S
Page 58 and 59: 56 3.2 W A T E R Q U A L I T Y I N
Page 64 and 65: 62 3.3 W A T E R Q U A L I T Y I N
Page 67 and 68: 4 Guidelines for Future Work - Wate
Page 69 and 70: 5 References 1. Directive 2000/60/E
Page 71 and 72: R E F E R E N C E S 55. Pravilnik o
Page 73 and 74: G L O S S A R Y O F T E R M S Hydro

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