Waters Protection Ordinance
(WPO)

¹ Any per­son who con­structs or al­ters in­stall­a­tions or car­ries out activ­it­ies which rep­res­ent a risk to wa­ters in areas par­tic­u­larly at risk (Art. 29 para. 1) as well as in ground­wa­ter pro­tec­tion zones and areas must take all meas­ures ex­pedi­ent for the pro­tec­tion of the wa­ters ac­cord­ing to the cir­cum­stances and in par­tic­u­lar must:

a.

take the meas­ures re­quired un­der An­nex 4 num­ber 2;

b.

set up the ne­ces­sary mon­it­or­ing, alarm and stand-by ar­range­ments.

² The au­thor­it­ies shall en­sure that:

a.

for ex­ist­ing in­stall­a­tions in areas un­der para­graph 1, where there is a genu­ine risk of pol­lu­tion of the wa­ters, meas­ures to pro­tect wa­ters, es­pe­cially those un­der An­nex 4 num­ber 2, are taken, ac­cord­ing to cir­cum­stances;

b.

ex­ist­ing in­stall­a­tions in ground­wa­ter pro­tec­tion Zones S1 and S2 that en­danger a ground­wa­ter well or a re­charge in­stall­a­tion are re­moved with­in an ap­pro­pri­ate peri­od of time, and that un­til re­mov­al of these in­stall­a­tions oth­er meas­ures for pro­tect­ing the drink­ing wa­ter are taken, in par­tic­u­lar dis­in­fec­tion or fil­tra­tion.