Decs Szennyviztisztito Telep - Advanced Wastewater Treatment in Őcsény, Hungary

Decs Szennyviztisztito Telep is an advanced wastewater treatment plant located in Őcsény, within the Tolna county of Hungary's Dél-Dunántúl region. The facility serves a population of 7,600, placing it in the medium agglomeration category under Hungarian and EU regulations. The plant employs advanced treatment processes, which go beyond the EU Urban Waste Water Treatment Directive's minimum secondary treatment requirement for agglomerations of this size. With a designed capacity of 4,200 m³/day and an actual discharge volume of 895.90 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into the local watershed, which ultimately drains into the Danube River via the Sió Canal system. The Danube is a major European waterway, and the plant's advanced treatment helps protect downstream ecosystems, including the Danube Delta, a critical habitat for diverse aquatic species.

The plant discharges into the Sió Canal, a man-made waterway that connects Lake Balaton to the Danube River. The Danube flows through Hungary and several other countries before reaching the Black Sea. The advanced treatment level ensures that nutrient and pollutant loads are minimized, protecting the Danube's water quality and supporting aquatic life, including fish species such as sturgeon and various migratory birds along the river corridor.