KAZALCI OKOLJA

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In 2019, drinking water monitoring was carried out in supply zones (water supply systems) that supply 50 or more persons (93% of the population). Large and medium supply zones that supply more than 1,000 (85%) of the population, generally have adequate drinking water quality. The smallest supply zones that supply 50-500 people are the least regulated, in comparison to larger due to the fecal contamination, as some with surface and karst water resources. The results of chemical analysis exceeded limit value of the pesticide desethyl-atrazine (1,130 people exposed), and indicator parameters: aluminium, manganese and iron. In addition, audit monitoring for chemical parameters were not carried out for 96,518 residents on supply zones with 50-500 residents. In the period 2004-2019, the quality of drinking water has improved, mainly due to the nitrates and pesticides.


Charts

Figure VD08-1: Share of non-compliant samples for faecal contamination (the presence of E. coli), by size classes of drinking water supply areas, 2004-2019 (check monitoring)
Sources: 

Insitute of Public health, 2005-2008; The Health Insurance Institute Maribor, 2009-2013; National Laboratory of Health, Environment and Food, 2014-2020 (21. 10. 2020)

Chart note: 

1-Due to changes in sampling methodology - a different number of samples in each of the years in the size range of 50-500 inhabitants is not possible to estimate the trend for small supply zone, 2004-2019.

2 For smaller supply zone (50-500 residents) were large differences in the number of samples taken for check monitoring, in individual years: in 2004-2005 were 4-5 samples, in 2006-2009 one sample, in 2010 2 samples; smaller supply zone with 50-500 residents contribute the majority of non-compliant samples for E. coli.

Show data

small (50-1000)[%]

medium (1001-10.000)[%]

large (>10.000)[%]

total[%]

2004

29

6.70

2.60

19

2005

28

5.80

1.70

18.40

2006

24.10

4.60

0.40

10.30

2007

24.50

5.30

2.10

10.90

2008

24.61

4.45

0.71

10.30

2009

19.34

4.27

1.19

8.45

2010

18.89

3.68

0.51

9.05

2011

16

1

0.80

7.60

2012

12.30

1.80

0.40

6.70

2013

8.60

1.33

0.44

4.34

2014

7.87

1.11

0.17

3.67

2015

5.80

1.10

0.20

3

2016

5.70

1.70

0.10

3.10

2017

5.39

0.61

0.10

2.77

2018

4.10

0.80

0

2.10

2019

3.40

0.47

0.10

1.70

Figure VD08-2: Share of non-compliant samples for faecal contamination (the presence of E. coli) by size classes of drinking water supply zone and by public health administrative areas, 2019 (check monitoring - Group A parameters)
Sources: 

National laboratory of Health, Environment and Food, 2020 (21. 10. 2020)

Show data
small (50-1000)[%]medium (1001-10.000)[%]big (>10.000)[%]
Gorenjska1.0600
Goriška4.0500
JV Slovenija2.6300
Koroška2.7300
Obalno-kraška1500
Osrednjeslovenska2.0500.31
Podravska5.102.560
Pomurska000
Posavska0.7800
Primorsko-notranjska7.5000
Savinjska3.4500
Zasavska2.422.440
Slovenija3.400.470.10
Figure VD08-3: Non-compliant samples due to E. coli, by size classes of drinking water supply zones, Slovenia, 2019
Sources: 

Database on systems for water supply and compliance of drinking water 2019, National Laboratory of Health, Environment and Food 2020; cartographic basis: Slovenian environment agency, The surveying and mapping authority of the RS; Data processing and cartography: National Institute for public health, 2019. (21. 10. 2020)

Chart note: 

One non-compliant sample due to the presence of Escherichia coli was also in the framework of periodic trials in large supply areas (Large (> 10,000);

- Total regular and periodic tests: 2 non-compliant samples in a large class of 10,000 - 20,000 inhabitants.

Show data
Figure VD08-4: Proportion of non-compliant samples for chemical parameters (nitrates and pesticides, sometimes also arsenic, lead, aluminium, manganese, iron and nickel), by size classes of drinking water supply zone 2004-2019 (Audit monitoring - Group B parameters)
Sources: 

Institute of Public health, 2005-2008; The Health Insurance Institute Maribor, 2009-2013; National Laboratory of Health, Environment and Food, 2014-2020 (21. 10. 2020)

Chart note: 

In 2019, on the small supply zone audit monitoring are carried out in the supply areas with 501 - 1000 residents. On supply areas with 50-500 inhabitants audit monitoring carried out only in 5-10% of supply areas in the 2006-2010 period - each year on the other, and at 10 % in 2014-2016.

In the years 2004-2005 and 2011-2013 and 2017-2019 audit monitoring in supply zones with 50-500 residents are not carried out.

Show data

small (50-1000)[%]

medium (1001-10.000)[%]

big (>10.000)[%]

2004

10.60

2.40

7.10

2005

6.70

2.90

7.60

2006

6.50

1.70

2.50

2007

7.10

2.30

1.90

2008

0.61

1.14

6.83

2009

5.80

1.81

3

2010

9.20

0.43

6.95

2011

7.75

2.02

2.12

2012

4.80

3.40

2.80

2013

2.80

1.33

1.83

2014

6.96

2.68

0.89

2015

5.10

1.90

1.60

2016

3.90

1.20

3.60

2017

1.06

0.61

1.46

2018

0

1.80

1.40

2019

2.20

0

0

Figure VD08-5: Number of inhabitants exposed to exceeded pesticide concentrations in drinking water and type of pesticide with the highest exceeded concentration, 2004–2019 (limit value for pesticide in drinking water is 0.10 µg/l, for the sum of pesticides is 0.50 µg/l)
Sources: 

Insitute of Public health, 2005-2008; The Health Insurance Institute Maribor, 2009-2013; National Laboratory of Health, Environment and Food, 2014-2020 (21. 10. 2020)

Chart note: 

Number of inhabitants refers to the supply areas in which a certain pesticide or more pesticides has been exceeded in drinking water.

Show data

[µg/L]

[µg/L]

[µg/L]

[µg/L]

[µg/L]

[µg/L]

[µg/L]

[µg/L]

[µg/L]

[µg/L]

[µg/L]

[µg/L]

[µg/L]

[µg/L]

[µg/L]

2004

0.21

0

0

0.29

0

0.26

0

0

0

0

0

0

0

0

0

183881

2005

0.16

0.98

0

0.32

0

0

0

0.21

0.57

0

0

0.49

0

0

0.93

151297

2006

0.18

1.40

0

0.42

0

0

0

0

0

0

0

0

0

0

1.40

36999

2007

0.30

0.48

0

0.30

0

0

0

0

0

0

0.21

0

0

0

0.55

53544

2008

0.20

0.40

0

0.30

0

0

0

0

0.14

0.12

0

0

0

0

0.66

100689

2009

0.15

0.37

0

0.26

0.23

0

0

0

0.65

0

0

0

0

0

0.65

98611

2010

0.19

0.14

0.16

0.41

0

0

0.11

0

0

0

0

0

0

0

0.56

183690

2011

0.21

0.12

0

0.42

0

0

0

0

0.13

0

0

0

0.12

0

0

83996

2012

0.19

0

0

0.25

0

0

0

0

0.21

0

0

0.16

0

0

0

105443

2013

0.21

0

0

0.58

0

0

0

0

0

0

0

0

0

0

0.64

21686

2014

0.21

0

0

0.29

0

0

0

0

0

0

0

0

0.27

0

0.51

6512

2015

0.22

0.36

0

0.27

0

0

0

0

0

0

0

0

0

0

0.52

33975

2016

0.10

0

0

0.14

0

0

0

0

0

0

0

0

0

0

0

29400

2017

0.14

0.65

0

0.13

0

0

0

0

0

0

0

0

0

0

0

28869

2018

0

0.37

0

0.12

0

0

0

0

0

0

0

0

0

0

0

1533

2019

0

0

0

0.15

0

0

0

0

0

0

0

0

0

0

1130

Figure VD08-6: Number of inhabitants exposed to exceeded nitrate concentrations in the drinking water, 2004-2019 (limit value for nitrate in drinking water is 50 mg/l)
Sources: 

Insitute of Public health, 2005-2008; The Health Insurance Institute Maribor, 2009-2013; National Laboratory of Health, Environment and Food, 2014-2020 (21. 10. 2020)

Chart note: 

Number of inhabitants refers to the supply zone in which nitrates have been exceeded in drinking water.

Show data

Number of inhabitants[no.]

1995

112498

1996

89928

1997

22969

1998

1813

1999

2390

2000

1835

2001

3530

2002

3716

2003

15518

2004

12243

2005

4046

2006

34321

2007

3555

2008

4022

2009

4898

2010

3327

2011

3404

2012

2862

2013

2862

2014

3047

2015

2862

2016

0

2017

0

2018

17000

2019

0

Figure VD08-7: Nitrate concentration in drinking water, 2019
Sources: 

Database on systems for water supply and compliance of drinking water 2019, National Laboratory of Health, Environment and Food 2020; cartographic basis: Slovenian environment agency, The surveying and mapping authority of the RS; Data processing and cartography: National Institute for public health, 2019 (21. 10. 2020)

Figure VD08-8: Exceeded values for chemical parameters in drinking water in 2019
Sources: 

Database on systems for water supply and compliance of drinking water 2019, National Laboratory of Health, Environment and Food 2020; cartographic basis: Slovenian environment agency, The surveying and mapping authority of the RS; Data processing and cartography: National Institute for public health, 2019 (21. 10. 2020)