Every year the majority of wastewater is discharged directly into surface waters, which was also the case in 2015: 713.9 million m 3 of wastewater was discharged into them.
Vsako leto se največji del odpadne vode izpusti neposredno v površinske vode in tudi v letu 2015 je bilo tako, saj se je v te vode izpustilo 713,9 milijona m 3 vode.