Federal Act
on the Protection of Waters
(Waters Protection Act, WPA)

¹Soils shall be used ac­cord­ing to the state of the art, in such a way that wa­ters are not ad­versely af­fected in any way, in par­tic­u­lar avoid­ing both wash­ing away and leach­ing of fer­til­isers and plant treat­ment products.

^1bis In the area of con­tri­bu­tion of drink­ing wa­ter wells, only plant pro­tec­tion products whose use does not lead to ground­wa­ter con­cen­tra­tions of act­ive sub­stances and de­grad­a­tion products ex­ceed­ing 0.1 µg/l may be used.²⁴

²The Fed­er­al Coun­cil may en­act the ne­ces­sary reg­u­la­tions.