Waters Protection Ordinance
(WPO)

¹ The au­thor­it­ies shall ex­am­ine peri­od­ic­ally wheth­er:

a.

en­ter­prises which dis­charge in­dus­tri­al waste wa­ter in­to pub­lic sew­ers, and waste wa­ter treat­ment plants which dis­charge waste wa­ter in­to pub­lic sew­ers or in­to a body of wa­ter are com­ply­ing with the re­quire­ments set out in the au­thor­isa­tion;

b.

these re­quire­ments con­tin­ue to guar­an­tee ad­equate wa­ters pro­tec­tion.

² For this pur­pose, they shall take ac­count of the res­ults of the as­sess­ments made by the per­son re­spons­ible.

³ They shall ad­just the au­thor­isa­tions if ne­ces­sary and or­der the re­quired meas­ures. In do­ing so, they shall take ac­count of the ur­gency of the re­quired meas­ures, as well as the ob­lig­a­tions res­ult­ing from in­ter­na­tion­al agree­ments or de­cisions.