Overview
Kiili wastewater treatment plant in Kiili, Estonia, is an advanced treatment facility with a designed capacity of 2000 m³/day. The plant is now closed.
Kiili wastewater treatment plant is located in Kiili, a small town in Harju County, Estonia. The facility was designed with an advanced treatment level and a capacity of 2000 cubic meters per day, serving the local community. As an advanced treatment plant, it was equipped to remove nutrients and other pollutants beyond secondary treatment standards. The plant operated under Estonia's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires appropriate treatment for discharges into sensitive areas. For a plant of this scale, advanced treatment aligns with requirements for sensitive catchments. The facility is now closed, and wastewater management in the area has been transitioned to other infrastructure. The plant's treated effluent would have discharged into local watercourses that drain into the Baltic Sea via the Gulf of Finland. The region's watershed supports diverse aquatic life and contributes to the ecological health of the Baltic Sea, a semi-enclosed sea sensitive to nutrient pollution.
Environmental context
The plant's discharge would have entered local streams and rivers flowing into the Gulf of Finland, part of the Baltic Sea. The Baltic Sea is a brackish, semi-enclosed sea with limited water exchange, making it highly sensitive to nutrient inputs. Advanced treatment at this plant helped reduce nitrogen and phosphorus loads, protecting downstream aquatic ecosystems from eutrophication.
Frequently asked questions
The Kiili wastewater treatment plant was located at 20 Sahkari, Kiili alev, Kiili vald, Harju maakond, Estonia, in the town of Kiili.
The Kiili plant had a designed capacity of 2000 cubic meters per day, serving the local population with advanced treatment.
The plant is listed as closed, likely due to consolidation of wastewater services or upgrades to regional infrastructure, which is common in smaller Estonian municipalities.
Estonia follows the EU Urban Waste Water Treatment Directive (91/271/EEC). For a plant of this scale, advanced treatment would be required if discharging into a sensitive area, such as the Baltic Sea catchment.
The plant's discharge would have entered local streams draining into the Gulf of Finland and ultimately the Baltic Sea, a sensitive marine environment.
Nearby plants