1
The infiltration of polluted wastewater is prohibited.
2
The authorities may authorise the infiltration of communal wastewater or of other polluted wastewater of comparable composition, if:
a.
the wastewater has been treated and meets the requirements for discharge into waters;
b.
in the case of the groundwater concerned, water quality requirements according to Annex 2 are met after infiltration of the wastewater;
c.
infiltration ensues at an installation intended for the purpose, the directives of the SoilPO9 are not exceeded even in the long term, or in the absence of directives soil fertility is also guaranteed in the long term; and
d.
requirements valid for wastewater treatment plants which discharge wastewater into a body of water are met (Arts. 13–17).