Overview
Lumnezia Cons is a secondary wastewater treatment plant in Lumnezia, Graubünden, Switzerland, serving 96 people with a designed capacity of 225 m³/day.
Lumnezia Cons is a municipal wastewater treatment plant located in the village of Cons, part of the Lumnezia valley in the Swiss canton of Graubünden. The plant serves a small population of 96 residents in this alpine region, reflecting the dispersed settlement pattern typical of the Swiss Alps. The plant provides secondary treatment, which is the standard biological treatment required under Swiss water protection legislation. With a designed capacity of 225 m³/day and an average discharge volume of 43.58 m³/day, the facility operates well below its capacity, indicating adequate headroom for seasonal variations. Swiss regulations, aligned with the EU Urban Waste Water Treatment Directive, mandate secondary treatment for agglomerations of this scale to protect sensitive mountain water bodies. The treated effluent is discharged into local streams that feed the Glenner river, a tributary of the Rhine. The Rhine ultimately flows into the North Sea. The plant plays a crucial role in preserving water quality in the ecologically sensitive alpine watershed, supporting aquatic life and downstream uses.
Environmental context
The plant discharges into small mountain streams that drain into the Glenner river, part of the Rhine basin. The Rhine flows through Switzerland, Germany, and the Netherlands before reaching the North Sea. The alpine watershed is ecologically sensitive, supporting diverse aquatic species including brown trout and other cold-water fish. Protecting water quality in this headwater region is vital for the entire downstream ecosystem.
Frequently asked questions
Lumnezia Cons is located in the village of Cons, in the Lumnezia valley, part of the Surselva region in the canton of Graubünden, Switzerland.
The plant serves a population of 96 people, typical of small alpine communities in the Swiss canton of Graubünden.
Lumnezia Cons provides secondary treatment, which involves biological processes to remove organic matter and nutrients, meeting Swiss standards for wastewater treatment.
Switzerland's water protection legislation, aligned with the EU Urban Waste Water Treatment Directive, requires secondary treatment for agglomerations of this size to protect sensitive water bodies. The plant complies with these standards.
The treated effluent flows into local streams that feed the Glenner river, a tributary of the Rhine. The Rhine ultimately discharges into the North Sea.
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