Locarno Foce Maggia Wastewater Treatment Plant, Locarno, Ticino, Switzerland

Locarno Foce Maggia is a wastewater treatment plant located in Locarno, in the canton of Ticino, Switzerland. It serves a population of approximately 54,729, placing it in the medium-to-large agglomeration category. The plant is situated near the Maggia River delta, where it discharges treated water into Lake Maggiore. Switzerland's water protection legislation, particularly the Waters Protection Act (GSchG) and the Waters Protection Ordinance (GSchV), mandates advanced treatment for plants of this scale. Swiss plants typically employ mechanical, biological, and often phosphorus removal stages to meet strict effluent limits. The plant's capacity and operational details are managed by local authorities to ensure compliance with federal standards. The treated effluent from Locarno Foce Maggia flows into the Maggia River and subsequently into Lake Maggiore, a large subalpine lake shared with Italy. Lake Maggiore supports diverse aquatic life and is a vital resource for tourism, fishing, and drinking water. The plant plays a crucial role in protecting the lake's water quality from nutrient pollution and pathogens, particularly given the region's dense population and recreational use.

Locarno Foce Maggia discharges treated wastewater into the Maggia River, which flows into Lake Maggiore, a major subalpine lake in the Po River basin. Lake Maggiore is ecologically sensitive, supporting diverse fish species and migratory birds. The plant's nutrient removal helps prevent eutrophication in the lake, which is a critical water resource for the region.