Kernrechtsfrage
Whether the municipality's autonomy was violated by annulling the fee for rainwater discharged directly into the watercourse.
Extrahierter Entscheid
No. The cantonal court's view that the fee lacked a legal basis for discharge into a public watercourse was not arbitrary and did not violate municipal autonomy.
Extrahierte Begründung
Cantonal and federal water law require rainwater to be infiltrated or, failing that, discharged into an open watercourse; only discharge into a sewer may justify a recurring wastewater fee. A stream is not a sewer, and the cantonal water-construction financing scheme leaves no room for such a user fee.