KAZALCI OKOLJA

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Neutral

Water consumption in Slovenia represents a relatively small proportion of the annual gross water outflow from the country. In 2014, the annual WEI index was around 2%, or, compared to the periodic average of water availability, 3%. The Long-term Annual Average Water Exploitation Index shows a slight increase, but the trend is not statistically significant.

Neutral

In recent years, the amount of wastewater treated by secondary or tertiary treatment processes increased, while the amount of wastewater treated exclusively through primary treatment processes decreased. The amount of wastewater treated with secondary treatment processes has increased by 205% since 2002, from 38 million m3 (in 2002) to almost 78 million m3 (in 2014). Tertiary wastewater treatment was almost non-existent in Slovenia in 2003, while in 2014, 50% of all treated wastewater, or 78 million m3, was treated by tertiary processes.

Neutral

While annual runoff in Slovenia was above the average in 2013 and 2014, it fell below the average in 2015. In the period 1961–2015, annual runoff was lower only in 1983, 2003 and 2011. The long-term downward trend of river runoff from the Slovenian territory currently persists.

Neutral

Slovenian groundwater bodies most polluted with nitrates are those with intergranular (alluvium) aquifers, particularly in north-eastern Slovenia. Groundwater in karst and fractured aquifers is less burdened with nitrates due to geographical conditions, low population density and less agricultural land. In the period 1998–2015, the average annual levels of nitrates in water bodies in the Savinja, Drava and Mura basins show a statistically significant downward trend. In other water bodies, declining nitrate levels are not statistically significant.

Neutral

In general, the levels of pesticides in groundwater are decreasing. In Slovenian lowlands (the Drava and Mura river basins), which are characterised by intensive agricultural activity, certain pesticides, phytopharmaceuticals in particular, still exceed quality standards. Individual point sources of pollution can be a result of unskilled use of plant protection products.

Neutral

In Europe, the number of lakes with low phosphorus content and greater transparency is increasing, which is the result of measures taken to reduce pollution in their catchment areas. Compared to the 70s, improvement has been observed in Lake Bled since the introduction of remediation measures. As a result, the lake is again classified as moderately burdened and mesotrophic. However, excessive concentrations of phosphorous compounds are still occasionally present, which are reflected in increased phytoplankton biomass and reduced transparency of the lake.

Neutral

Large and medium supply areas, which supply more than 1,000 people (85 % of the population), generally have adequate quality of drinking water. Out of these, one fifth of population is supplied with drinking water, which does not need preparation. From health prevention point of view, the most uncontrolled are the small supply areas, which supply 50-1,000 people (mainly areas with 50-500 people) because they are polluted with faeces. Similar applies for areas, which are supplied with surface water, which from health risk point of view include karst sources of drinking water.

Good

Inland bathing water quality in Slovenia is good and comparable with bathing water quality in other European countries.

Good

In the observed period of 1996 to 2017, the values ​​of parameters used for monitoring the organic loading of rivers were greatly reduced. The reduction corresponds to an increase in the share of population whose wastewater is treated at wastewater treatment plants. The river nutrient loading varies considerably among rivers of the Adriatic and the Danube river basins. Average values ​​of nitrate and orthophosphate in the Soča river catchment and the Adriatic rivers are within the natural background.

Good

Average levels of nitrate and orthophosphate in rivers are above the natural background values and do not show significant changes in the observed period. Average values ​​of biochemical oxygen demand and ammonia concentration in rivers in the observed period have been decreasing. The decrease is in accordance with the increase in the percentage of the population connected to municipal and common wastewater treatment plants.