ROWP HARLAU Wastewater Treatment Plant, Hârlău, Iași County, Romania

ROWP HARLAU is a municipal wastewater treatment plant located near Hârlău in Iași County, Romania. It serves a population equivalent of 27,430, classifying it as a medium agglomeration under EU criteria. The plant is situated in the northeastern part of the country, an area characterized by rolling hills and a continental climate. As a Romanian facility, ROWP HARLAU operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The directive also mandates more advanced treatment if the receiving waters are designated as sensitive areas. Romania has transposed these requirements into national law, and the plant is expected to comply with relevant discharge standards. The treated effluent from ROWP HARLAU likely discharges into a local watercourse that feeds into the Bahlui River, a tributary of the Jijia River, which ultimately flows into the Prut River and then the Danube. The Danube carries the water to the Black Sea. This watershed supports diverse aquatic life and is important for regional agriculture and biodiversity.

The plant's discharge enters a local stream that flows into the Bahlui River, a tributary of the Jijia River. The Jijia joins the Prut River, which forms part of Romania's eastern border and flows into the Danube. The Danube Delta, a vast wetland of ecological significance, is the final destination before the Black Sea. This watershed supports diverse fish species and migratory birds, making water quality management critical for downstream ecosystems.