Telfs Wastewater Treatment Plant: Serving Telfs, Tirol, Austria

The Telfs wastewater treatment plant is located in the municipality of Telfs, in the state of Tirol, Austria. It serves a population of approximately 35,531 people, classifying it as a medium-sized agglomeration under Austrian and EU regulations. The plant is situated along the Inn River, which flows through the Inn Valley in the Alpine region. As an Austrian plant serving over 10,000 population equivalents, Telfs operates under 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 appropriate treatment to meet quality standards before discharge into sensitive areas. The plant's treatment process and capacity are consistent with these regulatory requirements. The treated effluent is discharged into the Inn River, a major tributary of the Danube. The Inn River flows through the Alps and supports diverse aquatic life, including fish species such as grayling and brown trout. Downstream, the Inn joins the Danube, which ultimately reaches the Black Sea, making the plant's operations important for the ecological health of both the local river and the broader Danube basin.

The Telfs plant discharges into the Inn River, which flows through the Inn Valley in the Austrian Alps. The Inn is a major tributary of the Danube, eventually reaching the Black Sea. The river supports a cold-water aquatic ecosystem with species such as grayling and brown trout. The plant's treatment performance is critical to maintaining water quality in this sensitive Alpine river, which is also used for recreation and hydropower.