Overview
Rujienas jaunas NAI is a secondary wastewater treatment plant in Rūjiena, Latvia, serving approximately 1,245 people. It discharges 201.05 m³/day of treated effluent.
Rujienas jaunas NAI is a municipal wastewater treatment plant located at 35 Brīvības iela in Rūjiena, a town in Valmieras novads, Latvia. The plant serves a population of approximately 1,245 people, classifying it as a small agglomeration under EU standards. The plant provides secondary treatment, which is the minimum required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. The designed capacity is 4,930 m³/day, with a current discharge volume of 201.05 m³/day, indicating ample reserve capacity. The treated effluent is discharged into the local watershed, which ultimately drains into the Baltic Sea via the Rūja River and the Gulf of Riga. The plant plays a key role in protecting downstream water quality and supporting the ecological health of the region's rivers and coastal environment.
Environmental context
The plant discharges into the Rūja River, a tributary of the Salaca River, which flows into the Gulf of Riga and the Baltic Sea. This watershed supports diverse aquatic life and is important for migratory fish species. The secondary treatment helps reduce nutrient loading, which is critical for preventing eutrophication in the sensitive Baltic Sea ecosystem.
Frequently asked questions
The plant is located at 35 Brīvības iela in Rūjiena, Valmieras novads, Latvia.
The plant serves approximately 1,245 people, classifying it as a small agglomeration under EU definitions.
The treated effluent is discharged into the local watershed, which flows into the Rūja River and eventually reaches the Gulf of Riga and the Baltic Sea.
The plant provides secondary treatment, meeting the EU Urban Waste Water Treatment Directive requirements for freshwater discharges from agglomerations of this size.
As a Latvian plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for small agglomerations discharging to freshwater.
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