Hum na Sutli Wastewater Treatment Plant - Općina Hum na Sutli, Slovenia

Hum na Sutli is a wastewater treatment plant located in the settlement of Mali Tabor, within the municipality of Općina Hum na Sutli in Krapinsko-zagorska županija, northern Slovenia. The plant serves the local population and is part of the region's municipal wastewater infrastructure. The facility operates at a secondary treatment level, which is the standard required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this scale. Its designed capacity is 2,000 cubic meters per day, indicating it serves a small to medium-sized community. The treated effluent is discharged into the local watershed, which ultimately drains into the Sava River basin and then into the Danube River, reaching the Black Sea. The plant plays a role in protecting the water quality of downstream ecosystems, including the Sava River and its tributaries.

The plant discharges into the Sutla River (also known as Sotla), which forms the border between Slovenia and Croatia. The Sutla River flows into the Sava River, a major tributary of the Danube. The Sava River basin supports diverse aquatic life and is an important ecological corridor in the region. The plant's secondary treatment helps reduce organic pollution and nutrient loads, contributing to the health of these downstream water bodies.