Pipelines: Collection pipes

Drainage on cantonal roads. Polluted waste water must be treated, do not allow polluted waste water to be drained wherever possible. These basic principles also apply to transport routes. The sewerage systems of the water purification network transport wastewater and meteor water from its origin (buildings, industries, roads, agricultural land, etc.) to the wastewater treatment plants (ARA) or to natural waters (rivers, lakes, etc.).