Rummu puhasti Wastewater Treatment Plant, Vasalemma, Estonia

Rummu puhasti is a wastewater treatment plant located in Vasalemma, a small town in Harju County, Estonia. The plant served a population of 1,388 and has a designed capacity of 13,500 m³/day, indicating it was built to accommodate future growth. The facility is currently closed and no longer operational. The plant provided secondary treatment, which is the standard level required under the EU Urban Waste Water Treatment Directive for agglomerations of this size. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The plant's discharge volume was recorded at 319.79 m³/day, well below its design capacity. The treated effluent from Rummu puhasti would have discharged into local waterways that eventually drain into the Baltic Sea. The plant's location within 50 km of the coast means its operations could have influenced coastal water quality. Possibly to a larger regional facility.

The plant is situated in the Harju County region of Estonia, within the drainage basin of the Baltic Sea. The receiving water body is likely a small river or stream that flows into the Gulf of Finland, a sensitive marine environment. The Baltic Sea is a brackish inland sea with limited water exchange, making it vulnerable to nutrient pollution. The plant's secondary treatment would have helped reduce organic load, but without tertiary treatment, nutrient removal may have been limited, potentially contributing to eutrophication in the coastal zone.