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[VD08] Drinking water quality
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Key message
Neutral

In 2022, drinking water monitoring was carried out for 93.8% of Slovenia's population across 863 supply zones that serve 50 or more people. Large and medium-sized zones, serving more than 500 inhabitants, generally maintain a good water quality. The greatest issues are found in smaller zones (50-500 inhabitants) with a higher percentage of fecally contaminated samples. Chemical contamination was detected in two zones, mainly due to exceeded levels of lead and the pesticide desethyl-atrazine. The quality of drinking water improved between 2004 and 2022, particularly with reduced contamination from nitrates and pesticides.

Charts

Figure VD08-1: Percentage of non-compliant samples due to fecal contamination (presence of E. coli), by size categories (OO), Slovenia, 2004–2022 (regular tests - Group A parameters)"
Sources:

Insitute of Public health, 2005-2008; The Health Insurance Institute Maribor, 2009-2013; National Laboratory of Health, Environment and Food, 2014-2023 (2024)

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, 2004-2021.

2 For smaller supply zone (50-500 inhabitants) 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 inhabitant contribute the majority of non-compliant samples for E. coli.

Show data
total[%] LARGE (>10.000)[%] MEDIUM (1.001-10.000)[%] TOTAL SMALL (50-1.000)[%] SMALL (501-1.000)[%] THE SMALLEST (50-500)[%]
2004 19 2.60 6.70 29 12.90 33.20
2005 18.40 1.70 5.80 28 12.20 32
2006 10.30 0.40 4.60 24.10 11.20 30.80
2007 10.90 2.10 5.30 24.50 12.10 30.90
2008 10.30 0.70 4.40 24.60 7.90 34.40
2009 8.50 1.20 4.30 19.30 7.60 26.30
2010 9 0.50 3.70 18.90 6.60 24.30
2011 7.60 0.80 1 16 3.40 20.40
2012 6.70 0.40 1.80 12.30 2.80 15.70
2013 4.30 0.40 1.30 8.60 2.80 10.40
2014 3.70 0.20 1.10 7.90 1.50 10.40
2015 3 0.20 1.10 5.80 2 7.60
2016 3.10 0.10 1.70 5.70 1.30 7.30
2017 2.80 0.10 0.60 5.40 1.10 6.80
2018 2.10 0 0.80 4.10 0.80 5.20
2019 1.70 0.10 0.50 3.40 0 4.50
2020 2.60 0.10 0.80 4.60 0.40 5.60
2021 1.80 0 0 3.40 0.40 4.10
2022 2.60 0.20 0.60 4.60 1.10 5.40
Figure VD08-2: Percentage of non-compliant samples due to faecal contamination (the presence of E. coli) by size classes of drinking water supply zone and by public health administrative areas, Slovenia, 2022 (check monitoring - Group A parameters)
Sources:

NLZOH - National Laboratory for Health, Environment and Food (2024)

Show data
THE SMALLEST (50-500)[%] SMALL (501-1.000)[%] TOTAL SMALL (50-1.000)[%] MEDIUM (1.001-10.000)[%] LARGE (>10.000)[%] total[%]
Slovenija 4.10 1.10 4.60 0.60 0.20 2.60
Zasavska 1.40 0 0.90 0 0 0.70
Savinjska 2.70 0 2.10 0 0 1.10
Primorsko-notranjska 10.50 0 10.50 0 0 4.20
Posavska 5.10 0 4.20 0 0 2.90
Pomurska 0 0 0 0 0 0
Podravska 9.10 20 9.70 3.40 0 3.90
Osrednjeslovenska 5.10 1.90 4.30 0 0.40 1.90
Obalno-kraška 22.20 0 19 0 0 4.40
Koroška 0 0 0 0 0 0
JV Slovenija 6.80 0 5.80 0 0 2.80
Goriška 6.20 2.60 5.50 0 0 4
Gorenjska 7.40 0 6.30 1.50 1.50 4.30
Figure VD08-3: Non-compliant samples due to E. coli, by size classes of drinking water supply areas Slovenia, 2022
Sources:

NLZOH - National Laboratory for Health, Environment and Food, (2024)

Note:

One non-compliant sample due to the presence of Escherichia coli was also in the framework of periodic trials in medium supply areas (medium (1001-10.000))

Show data
Figure VD08-4: Percentage of non-compliant samples due to chemical parameters (pesticides and nitrates – except in 2016-17 and 2019-22), in some years arsenic, lead and nickel), by size classes of supply zones, Slovenia, 2004-2022 (audit monitoring - Group B parameters)
Sources:

Insitute of Public health, 2005-2008; The Health Insurance Institute Maribor, 2009-2013; National Laboratory of Health, Environment and Food, 2014-2023 (2024)

Note:

In 2021, on the small supply zone audit monitoring are carried out in the supply areas with 501 - 1000 inhabitants and also in the supply areas with 50-500 but only for three supply zones 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 inhabitants are not carried out.

Show data
SMALL (50-1.000)[%] MEDIUM (1.001-10.000)[%] LARGE (>10.000)[%] total[%]
2004 10.60 2.40 7.10 5.60
2005 6.70 2.90 7.60 5.30
2006 6.50 1.70 2.50 3.30
2007 7.10 2.30 1.90 3.50
2008 0.60 1.10 6.80 2.80
2009 5.80 1.80 3 3.20
2010 9.20 0.40 7 5.10
2011 7.70 2 2.10 3.40
2012 4.80 3.40 2.80 3.60
2013 2.80 1.30 1.80 1.90
2014 7 2.70 0.90 3.80
2015 5.10 1.90 1.60 3.10
2016 3.90 1.20 3.60 2.90
2017 1.10 0.60 1.50 1
2018 0 1.80 1.40 1.30
2019 2.20 0 0 0.50
2020 0.80 0 0 0.40
2021 2.20 0.60 0.80 1
2022 1.10 0 0 0.30
Figure VD08-5: Pesticides in drinking water, Slovenia, 2004-2022, by pesticide and the highest concentration, and the number of exposed inhabitants to the exceeded parametric value for pesticide is 0,10 µg/L) (audit monitoring – Group B parameter)
Sources:

Insitute of Public health, 2005-2008; The Health Insurance Institute Maribor, 2009-2013; National Laboratory of Health, Environment and Food, 2014-2023 (2024)

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 0.29 0.26 183881
2005 0.16 0.98 0.32 0.21 0.57 0.49 0.93 151297
2006 0.18 1.40 0.42 1.40 36999
2007 0.30 0.48 0.30 0.21 0.55 53544
2008 0.20 0.40 0.30 0.14 0.12 0.66 100689
2009 0.15 0.37 0.26 0.23 0.65 0.66 98611
2010 0.19 0.14 0.16 0.41 0.11 0.56 183690
2011 0.21 0.12 0.42 0.13 0.12 83996
2012 0.19 0.25 0.21 0.16 105443
2013 0.21 0.58 0.64 21686
2014 0.21 0.29 0.27 0.51 6512
2015 0.22 0.36 0.27 0.52 33975
2016 0.10 0.14 29400
2017 0.14 0.65 0.13 288869
2018 0.37 0.12 1533
2019 0.15 1130
2020 0.11 0.20 1230
2021 0.10 0.12 0.80 28780
2022 0.13 580
Figure VD08-6: The number of exposed inhabitants to exceeded nitrate concentration in the period 2004-2022 (parametric 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, 2014-2023 (2024)

Note:

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

Show data
Number of inhabitants[no.] Number - Max. Nitrate Concentration[no.]
2004 12243 84
2005 4046 93
2006 34321 75
2007 3555 60
2008 4022 62
2009 4898 66
2010 3327 66
2011 3404 71
2012 2862 71
2013 2862 66
2014 3047 66
2015 2862 66
2016 0
2017 0
2018 17000 53
2019 0
2020 0
2021 0
2022 0
Figure VD08-7: Nitrate concentration in drinking water, 2022
Sources:

NLZOH - National Laboratory for Health, Environment and Food, (2024)

Figure VD08-8: Exceeded values for chemical parameters in drinking water in 2022
Sources:

NLZOH - National Laboratory for Health, Environment and Food, (2024)

Methodology

Other sources and literature

  • Agenda 2030, 2015. Spremenimo svet: Agenda za trajnostni razvoj do leta 2030. Organizacija Združenih narodov, 2015.
  • IVZ RS, 2005. Monitoring pitne vode 2004: Poročilo o pitni vodi v Republiki Sloveniji. Inštitut za varovanje zdravja Republike Slovenije. Ljubljana, maj 2005.
  • IVZ RS, 2006. Monitoring pitne vode 2005: Poročilo o pitni vodi v Republiki Sloveniji. Inštitut za varovanje zdravja Republike Slovenije, Ljubljana, maj 2006.
  • IVZ RS, 2007. Monitoring pitne vode 2006: Poročilo o pitni vodi v Republiki Sloveniji. Inštitut za varovanje zdravja Republike Slovenije. Ljubljana, maj 2007.
  • IVZ RS, 2008. Monitoring pitne vode 2007. Poročilo o pitni vodi v Republiki Sloveniji. Inštitut za varovanje zdravja Republike Slovenije, Ljubljana, julij 2008.
  • Ministrstvo za okolje in prostor. Operativni program oskrbe s pitno vodo za obdobje od 2015 do 2020, Ljubljana 2015.
  • NLZOH, 2014. Zbirka podatkov o sistemih za oskrbo s pitno vodo in o skladnosti pitne vode, 2013.
  • NLZOH, 2015. Zbirka podatkov o sistemih za oskrbo s pitno vodo in o skladnosti pitne vode, 2014.
  • NLZOH, 2016. Zbirka podatkov o sistemih za oskrbo s pitno vodo in o skladnosti pitne vode, 2015.
  • NLZOH, 2017. Zbirka podatkov o sistemih za oskrbo s pitno vodo in o skladnosti pitne vode, 2016.
  • NLZOH, 2018. Zbirka podatkov o sistemih za oskrbo s pitno vodo in o skladnosti pitne vode, 2017.
  • NLZOH, 2019. Zbirka podatkov o sistemih za oskrbo s pitno vodo in o skladnosti pitne vode, 2018.
  • NLZOH, 2020. Zbirka podatkov o sistemih za oskrbo s pitno vodo in o skladnosti pitne vode, 2019.
  • NLZOH, 2022. Zbirka podatkov o sistemih za oskrbo s pitno vodo in o skladnosti pitne vode, 2021.
  • NLZOH, 2023. Zbirka podatkov o sistemih za oskrbo s pitno vodo in o skladnosti pitne vode, 2022.
  • Pravilnik o pitni vodi (Uradni list RS, št. 19/04, 35/04, 26/06, 92/06, 25/09, 74/15 in 51/17).
  • SRS, 2017. Strategija razvoja Slovenije 2030. Ljubljana : Služba Vlade Republike Slovenije za razvoj in evropsko kohezijsko politiko, 2017.
  • Strategija Republike Slovenije za zdravje otrok in mladostnikov v povezavi z okoljem 2012–2020. Sprejela Vlada Republike Slovenije, s sklepom št. 02401-13/2010/5, z dne 1.12.2011.
  • Vlada RS, 2023. Operativni program oskrbe s pitno vodo 2022-2027.
  • ZZV MB, 2009. Zbirka podatkov o sistemih za oskrbo s pitno vodo in o skladnosti pitne vode, 2008.
  • ZZV MB, 2010. Zbirka podatkov o sistemih za oskrbo s pitno vodo in o skladnosti pitne vode, 2009.
  • ZZV MB, 2011. Zbirka podatkov o sistemih za oskrbo s pitno vodo in o skladnosti pitne vode, 2010.
  • ZZV MB, 2012. Zbirka podatkov o sistemih za oskrbo s pitno vodo in o skladnosti pitne vode, 2011.
  • ZZV MB, 2013. Zbirka podatkov o sistemih za oskrbo s pitno vodo in o skladnosti pitne vode, 2012.
  • Letopis NIJZ, 2024. Zdravstveni statistični letopis Slovenije. https://nijz.si/podatki/zdravstveni-statisticni-letopis-slovenije/.

Last modified
23.08.2024
Author(s)

Bonia Miljavac, Lara Ofentavsek.; National Institute of Public Health