KAZALCI OKOLJA

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The quality of drinking water in the period 2004-2014 has slightly improved. In general, larger supply zones have adequate drinking water quality. The most problematic are small supply zones due to frequent or permanent faecal contamination. Small supply zones are related to zones that cover 50-1000 residents (most frequently 50-500 residents). Problematic are also some small supply zones with surface water like karst source soft drinking water. The results of chemical analysis indicate contamination of drinking water with pesticides and nitrates. The monitoring of drinking water does not include systems for drinking water supply serving less than 50 persons. Audit monitoring for determining the chemical parameters were not carried out for about 278,000 residents.



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, Slovenia, 2004-2014 (regular tests)
Sources: 

IVZ RS, 2005 - 2008; ZZV MB, 2009-2013; NLZOH,2014- 2015

Note to table VD08-1*

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 areas ; improvement can be misleading.

2 For smaller supply areas ( 50 to 500 population) were large differences in the number of samples taken for routine tests , the provisioning area , in individual years : in 2004-2005 were taken after 4 samples , in 2006-2009 one sample from 2010 onwards for 2 sample ; smaller supply areas and will also contribute the majority of non-compliant samples for E. coli.

Show data
2004 2005 2006 2007 2008 2009 2010 2011 2012 2013
Small supply areas (50-1000) % 29 28 24.1 24.5 24.6 19.3 18.9 16 12.3 8.6
Medium sized supply areas(1001-10.000) % 6.7 5.8 4.6 5.3 4.4 4.3 3.7 1 1.8 1.3
Big supply areas (>10.000) % 2.6 1.7 0.4 2.1 0.7 1.2 0.5 0.8 0.4 0.4
Total % 19 18.4 10.3 10.9 10.3 8.5 9 7.6 6.7 4.3
2014
Small supply areas (50-1000) % 7.9
Medium sized supply areas(1001-10.000) % 1.1
Big supply areas (>10.000) % 0.2
Total % 3.7
Figure VD08-2: Share of non-compliant samples for faecal contamination (the presence of E. coli) by size classes of drinking water supply areas and by public health administrative areas, Slovenia, 2014 (regular tests)
Sources: 

NLZOH, 2015

Show data
SLOVENIA Pomurska Podravska Koroška Savinjska Zasavska Spodnjepos. JV Slovenija Prim.-notran. Osrednjeslov.
Small supply areas (50-1000) nmb. 7.9 1.1 13.1 7.4 3.1 8 8.8 7.5 19.4 8.5
Medium sized supply areas(1001-10.000) % 1.1 2.9 1.5 5.9 0 0 0 0 0 0
Big supply areas (>10.000) nmb. 0.2 0 0 - 0.7 0 0 0 0 0
Total nmb. 3.7 1.4 3.3 6.8 1.6 3.8 5.8 2.8 7.8 2.7
Gorenjska Goriška Obalno.kraška
Small supply areas (50-1000) nmb. 8.3 7.8 30
Medium sized supply areas(1001-10.000) % 1.3 0 -
Big supply areas (>10.000) nmb. 0.8 0 0
Total nmb. 4.5 5.1 6.3
Figure VD08-3: Share of non-compliant samples for chemical parameters (nitrates, pesticides, arsenic), by size classes of drinking water supply areas, Slovenia, 2004-2014 (occasional tests)
Sources: 

IVZ RS, 2005 - 2008; ZZV MB, 2009-2013; NLZOH, 2014-2015

Note to table VD08-3

1 On the small supply areas periodical tests are carried out in the supply areas with 501 - 1000 residents. On supply areas with 50-500 inhabitants periodical tests carried out only in 5-10% of supply areas in the 2006-2010 period - each year on the other , and at 10 % in 2014.

In the years 2004 - 2005 and 2011 - 2013 sporadic trials in supply areas with 50-500 inhabitants are not implemented , and therefore show a trend common in small supply areas is not possible.

2 In 2011, the Monitoring of nitrates or pesticides is carried on the supply areas where in the recent years their presence was detected and there was a possibility that will occur above the 25 mg / loz . 0.05 g / l , so data over the years can not be directly compared.

3 In 2013 and 2014, the monitoring of pesticides has not been implemented in all supply areas , which are otherwise conducted periodic tests of chemical parameters.

Show data
2004 2005 2006 2007 2008 2009 2010 2011 2012 2013
Small supply areas (50-1000) (1) % 10.6 6.7 6.5 7.1 0.6 5.8 9.2 7.7 4.8 2.8
Medium sized supply areas(1001-10.000) % 2.4 2.9 1.7 2.3 1.1 1.8 0.4 2 3.4 1.3
Big supply areas (>10.000) % 7.1 7.6 2.5 1.9 6.8 3 7 2.1 2.8 1.8
Total 5.6 5.3 3.3 3.5 2.8 3.2 5.1 3.4 3.6 1.9
2014
Small supply areas (50-1000) (1) % 7
Medium sized supply areas(1001-10.000) % 2.7
Big supply areas (>10.000) % 0.9
Total 3.8
Figure VD08-4: Pesticides in drinking water, by type of pesticide and the highest exceeded concentration, and the number of exposed inhabitants, Slovenia, 2004-2014 (ocassional tests) (limit value for pesticides in drinking water is 0,10 µg/l)
Sources: 

IVZ RS, 2005 - 2008; ZZV MB, 2009-2013; NLZOH, 2014-2015.

Show data
2004 2005 2006 2007 2008 2009 2010 2011 2012 2013
Atrazine µg/l 0.21 0.16 0.18 0.3 0.2 0.15 0.19 0.21 0.19 0.21
Bentazon µg/l - 0.98 1.4 0.48 0.4 0.37 0.14 0.12 - -
Bromacil µg/l - - - - - - 0.16 - - -
Disetyl-atrazine µg/l 0.29 0.32 0.42 0.3 0.3 0.26 0.41 0.42 0.25 0.58
Dicamba µg/l - - - - - 0.23 - - - -
Dimethenamid µg/l 0.26 - - - - - - - - -
Chlortoluron µg/l - - - - - - 0.11 - - -
Mecoprop µg/l - 0.21 - - - - - - - -
Metolachlor µg/l - 0.57 - - 0.14 0.65 - 0.13 0.21 -
Mesotrione µg/l - - - - 0.12 - - - - -
Permethryn µg/l - - - 0.21 - - - - - -
Terbuthylatrazine µg/l - 0.49 - - - - - - 0.16 -
Metazachlor µg/l - - - - - - - 0.12 - -
Diuron µg/l - - - - - - - - - -
Pesticides - sum µg/l - 0.93 1.4 0.55 0.66 0.65 0.56 - - 0.64
Number of exposed inhabitants * Number 183881 151297 36999 53544 100689 98611 183690 83996 105443 21686
2014
Atrazine µg/l 0.21
Bentazon µg/l -
Bromacil µg/l -
Disetyl-atrazine µg/l 0.29
Dicamba µg/l -
Dimethenamid µg/l -
Chlortoluron µg/l -
Mecoprop µg/l -
Metolachlor µg/l -
Mesotrione µg/l -
Permethryn µg/l -
Terbuthylatrazine µg/l -
Metazachlor µg/l 0.27
Diuron µg/l -
Pesticides - sum µg/l 0.51
Number of exposed inhabitants * Number 6512
Figure VD08-5: The number of exposed inhabitants to exceeded nitrate concentrations, Slovenia, 2004-2014 (the limit value for nitrate in drinking water is 50 mg / l)
Sources: 

IVZ RS, 2005 - 2008; ZZV MB, 2009-2013; NLZOH, 2014-2015.

Show data
1995 1996 1997 1998 1999 2000 2001 2002 2003 2004
Number of inhabitants* no. 112498 89928 22969 1813 2390 1835 3530 3716 15518 12243
Max. Concentration of nitrates no. 100* 99* 74* 74* 69 82 84
2005 2006 2007 2008 2009 2010 2011 2012 2013 2014
Number of inhabitants* no. 4046 34321 3555 4022 4898 3327 3404 2862 2862 3047
Max. Concentration of nitrates no. 93 75 60 62 66 66 71 71 66 66
Figure VD08-6: Concentration of nitrate in drinking water samples (audit monitoring), Slovenia, 2014
Sources: 

Zbirka podatkov o sistemih za oskrbo s pitno vodo in o skladnosti pitne vode, Nacionalni laboratorij za zdravje, okolje in hrano (NLZOH), 2015; podlage Agencija RS za okolje, GURS; Obdelava: Nacionalni inštitut za javno zdravje in Agencija RS za okolje, 2015

Figure VD08-7: Concentration of total pesticides in drinking water samples (audit monitoring), Slovenia, 2014
Sources: 

Zbirka podatkov o sistemih za oskrbo s pitno vodo in o skladnosti pitne vode, Nacionalni laboratorij za zdravje, okolje in hrano (NLZOH), 2015; podlage Agencija RS za okolje, GURS; Obdelava: Nacionalni inštitut za javno zdravje in Agencija RS za okolje, 2015.

Figure VD08-8: Non-compliant samples from E. coli, by size of supply zones (check monitoring), Slovenia, 2014
Sources: 

Zbirka podatkov o sistemih za oskrbo s pitno vodo in o skladnosti pitne vode, Nacionalni laboratorij za zdravje, okolje in hrano (NLZOH), 2015; podlage Agencija RS za okolje, GURS; Obdelava: Nacionalni inštitut za javno zdravje in Agencija RS za okolje, 2015.