Overview
OMEGNA_ACQUE_CUSIO is a wastewater treatment plant serving Granerolo, Piemonte, Italy. It treats wastewater for approximately 26,819 people in the Verbano-Cusio-Ossola province.
OMEGNA_ACQUE_CUSIO is a wastewater treatment plant located in Granerolo, a locality within the municipality of Gravellona Toce in the Piemonte region of Italy. The plant serves a population of approximately 26,819 people, placing it in the medium agglomeration category under Italian and EU regulations. It is situated in the Verbano-Cusio-Ossola province, an area known for its Alpine lakes and rivers. As an Italian plant serving a population between 10,000 and 100,000, OMEGNA_ACQUE_CUSIO is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment as a minimum. For agglomerations of this size, the directive also mandates more stringent treatment if the discharge enters a sensitive area, such as a lake or river used for drinking water abstraction. Compliance with national regulations ensures appropriate treatment standards. The plant discharges treated wastewater into the local water network, which ultimately drains into Lake Orta (Lago d'Orta), a deep subalpine lake in the Po Valley. Lake Orta is part of the Po River basin and has historically faced ecological challenges from industrial pollution. The plant plays a crucial role in protecting the lake's water quality and supporting the downstream aquatic ecosystem, which includes fish species such as perch and pike.
Environmental context
The plant discharges into the local hydrographic network that flows into Lake Orta, a deep subalpine lake in the Po River basin. Lake Orta is a sensitive ecosystem that has undergone significant recovery from past industrial pollution. The lake supports diverse aquatic life and is used for recreation and drinking water. The treated effluent from OMEGNA_ACQUE_CUSIO helps maintain water quality standards in the lake and its outflow, the Nigoglia River, which connects to the Toce River and eventually the Po River.
Frequently asked questions
OMEGNA_ACQUE_CUSIO is located in Granerolo, a locality in the municipality of Gravellona Toce, in the Verbano-Cusio-Ossola province of Piemonte, Italy.
The plant serves approximately 26,819 people, classifying it as a medium-sized agglomeration under EU regulations.
The plant discharges treated wastewater into the local water network, which flows into Lake Orta, a subalpine lake in the Po River basin.
As an Italian plant serving over 10,000 people, OMEGNA_ACQUE_CUSIO operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment and potentially more stringent treatment if discharging into sensitive areas.
For agglomerations of this size, Italian plants typically provide at least secondary biological treatment. If the receiving water body is sensitive, such as a lake, tertiary treatment may be required to remove nutrients like nitrogen and phosphorus.
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