In 2016, 200.6 million m3 of waste water was discharged from the public sewage system in Slovenia, which is 23% more than in 2015. Two thirds of waste water were treated before release.
More urban waste water generated in 2016
In 2016, 200.6 million m3 of waste water was discharged from the public sewage system in Slovenia, of which 0.1% from agriculture, forestry and fishing, 5.7% from industry, 7.3% from other activities and 27% from households, while 60% was other waste water (such as meteoric, run-off rain water, etc.).
In 2016, households generated 53.7 million m3 of urban waste water, which is 15.7% less than in 2015.
More treated waste water discharged in 2016
In to 2016, data runwater and run-off rain water were presented within treated and untreated waste water, resulting in much higher quantities of such water.
Thus, in 2016 almost two thirds of waste water was treated and the remaining one third of the waste water was untreated before discharge from the sewage system.
In 2016, 69% of the waste water discharged from the public sewage system was treated in the treatment plants and 31% was untreated. Of the total volume of 63 million m3 of untreated waste water, almost 97% was released into surface water and about 3% into ground water and less than 1% on the coast. Of the total volume of 137.6 million m3 of treated waste water, almost all was discharged into surface water (88%), while about 5% was discharged on the coast and a little over 6.7% into ground water.
Larger quantities of drainage waste water (rainwater and run-off rain water)
Almost 120 million m3 of waste water ran off from roofs and hardened paved areas into the public sewage (or the soil).
Rainwater and run-off rain water in 2016 represented 60% of waste water. Compared to 2015, the quantity increased by 57% due to rain.
Due to the change of the data source and also the increase in the number of reporting units, data for 2016 are not entirely comparable with those for the previous years.
Due to the change of data source, from 2016 onwards also the data on meteoric water are presented within treated and untreated waste water, but not separately.
In reporting the data on the number of connections to the sewage system and on the length of the sewage system some differences have occurred when managing the cadastral register, and also due to linkage and setting up of new sewage systems.
Detailed data are available on the SI-STAT data portal.
Table 1: Treated and untreated waste water discharged, Slovenija
1) Data on meteoric and rain water are presented within treated and untreated waste water.