Waters Protection Ordinance
(WPO)

¹ The can­tons shall draw up a sludge dis­pos­al plan and bring it in­to line with the new re­quire­ments with­in the dead­lines im­posed by ex­perts.

² The dis­pos­al plan sets the fol­low­ing as a min­im­um:

a.

how sludge from the cent­ral waste wa­ter treat­ment plants should be dis­posed of;

b.

which pro­ced­ures, in­clud­ing con­struc­tion and modi­fic­a­tion of in­stall­a­tions used for dis­pos­al of sludge, are re­quired at what time.

³ The sludge dis­pos­al plan shall be ac­cess­ible to the pub­lic.