Reola biotiigid Wastewater Treatment Plant, Tartu maakond, Estonia

Reola biotiigid is a wastewater treatment facility located in the village of Reola, Kambja parish, Tartu maakond, Estonia. The plant serves a population of 1,263 and is part of the municipal infrastructure for the region. It operates as a secondary treatment plant, which is the standard level required under the EU Urban Waste Water Treatment Directive for agglomerations of this size. The plant has a designed capacity of 1,317 cubic meters per day and currently discharges approximately 290.99 cubic meters per day, indicating it operates well below its capacity. As a secondary treatment facility, it employs biological processes to reduce organic matter and suspended solids, meeting the effluent quality standards set by Estonian and EU regulations. The treated effluent is discharged into the local watershed, which ultimately drains into the Emajõgi River basin and then into Lake Peipus, one of the largest transboundary lakes in Europe. This water body supports diverse aquatic life and is an important ecological and economic resource for Estonia and Russia. The plant's operation helps protect the water quality of this sensitive ecosystem.

The plant discharges into the Emajõgi River basin, which flows into Lake Peipus, a large transboundary lake shared with Russia. Lake Peipus is ecologically significant, supporting diverse fish populations and serving as a critical habitat for migratory birds. The watershed is also used for recreation and fishing, making nutrient and pollutant control essential to prevent eutrophication and maintain water quality.