Overview
CROGLIO MAGLIASINA wastewater treatment plant serves Tresa, Ticino, Switzerland. It treats wastewater from approximately 12,054 people under Swiss water protection regulations.
CROGLIO MAGLIASINA is a wastewater treatment plant located in Tresa, in the canton of Ticino, Switzerland. The plant serves a population of approximately 12,054 people, making it a medium-sized agglomeration in the Swiss context. It is situated in the southern part of Switzerland, near the Italian border, in the Lugano district. Switzerland's wastewater treatment standards are governed by the Swiss Water Protection Act (Gewässerschutzgesetz), which mandates appropriate treatment for all discharges. For agglomerations of this scale, secondary treatment with nutrient removal is typically required to protect sensitive water bodies. It operates under Swiss federal and cantonal regulations that ensure compliance with water quality standards. The plant discharges into the local watershed, which ultimately drains into Lake Lugano (Lago di Lugano) and then via the Tresa River into Lake Maggiore. These lakes are part of the Po River basin, which flows into the Adriatic Sea. The region's aquatic ecosystems are sensitive to nutrient pollution, and the plant plays a key role in maintaining water quality in this transboundary area.
Environmental context
The plant's receiving waters flow into the Tresa River, which connects Lake Lugano to Lake Maggiore, part of the Po River basin that drains into the Adriatic Sea. This watershed supports diverse aquatic life, including fish species such as perch and pike, and is an important ecological corridor in the Southern Alps region. Nutrient loading from wastewater can impact lake ecosystems, making effective treatment critical for preserving water quality and biodiversity.
Frequently asked questions
CROGLIO MAGLIASINA is located in Tresa, in the canton of Ticino, Switzerland, near the Italian border. The address is 22, Strada Cantonale, Barico, Croglio, Purasca, Tresa, Circolo di Sessa, Distretto di Lugano, Ticino, 6989.
The plant serves approximately 12,054 people, classifying it as a medium-sized agglomeration under Swiss wastewater regulations.
The plant discharges treated wastewater into the local watershed, which flows into the Tresa River. This river connects Lake Lugano to Lake Maggiore, part of the Po River basin that ultimately reaches the Adriatic Sea.
The plant operates under the Swiss Water Protection Act (Gewässerschutzgesetz), which sets standards for wastewater treatment to protect water bodies. For agglomerations of this size, secondary treatment with nutrient removal is typically required, especially in sensitive areas like the Lake Lugano basin.
In Switzerland, plants serving around 12,000 people are generally required to provide secondary treatment with biological nutrient removal. This helps reduce phosphorus and nitrogen loads to protect lakes and rivers from eutrophication, in line with the Swiss Water Protection Act.
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