In the Zasavska statistical region almost all waste water (97%) was treated before being discharged from the public sewage system. In Jugovzhodna Slovenija the least waste water (31%) was treated before discharge.
Največ odpadne vode so pred izpustom iz javne kanalizacije prečistili v zasavski statistični regiji (97%), najmanj pa v statistični regiji jugovzhodna Slovenija (31%).