Overview
SIA Valmieras udens serves Valmiera, Latvia, treating wastewater for approximately 28,584 residents. The plant operates under EU Urban Waste Water Treatment Directive 91/271/EEC, which mandates secondary treatment for agglomerations of this scale.
SIA Valmieras udens is the municipal wastewater treatment plant serving Valmiera, a city in the Vidzeme region of Latvia. The facility handles wastewater from a population equivalent of roughly 28,584 people, classifying it as a medium-sized agglomeration under EU classification. Located at 3A Jumaras iela in the Putriņas neighborhood, the plant is a key component of Valmiera's urban infrastructure. As a plant in an EU member state, SIA Valmieras udens is subject to the Urban Waste Water Treatment Directive 91/271/EEC. For agglomerations between 10,000 and 100,000 population equivalent, the directive requires secondary treatment (biological treatment) as a minimum standard. The plant's treatment processes are designed to meet these regulatory requirements, ensuring that effluent quality complies with EU standards before discharge. The treated wastewater from SIA Valmieras udens is discharged into the Gauja River, the largest river in Latvia, which flows through Valmiera and ultimately drains into the Baltic Sea. The Gauja River is an ecologically significant waterway, supporting diverse aquatic life and serving as a habitat for salmonid species. The plant's operations help protect the river's water quality and the downstream Baltic Sea ecosystem.
Environmental context
The Gauja River, which receives treated effluent from SIA Valmieras udens, flows through the Gauja National Park and eventually reaches the Baltic Sea. This river supports a rich biodiversity, including Atlantic salmon and brown trout, and is an important migratory corridor for fish. The plant's discharge must meet stringent EU standards to prevent nutrient enrichment and protect the sensitive aquatic habitats downstream.
Frequently asked questions
SIA Valmieras udens is located at 3A Jumaras iela in the Putriņas neighborhood of Valmiera, Latvia.
The plant serves approximately 28,584 people, classifying it as a medium-sized agglomeration under EU classification.
Treated wastewater from the plant is discharged into the Gauja River, which flows through Valmiera and eventually reaches the Baltic Sea.
As a Latvian plant, SIA Valmieras udens operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment for agglomerations of its size.
Under the EU Urban Waste Water Treatment Directive, plants serving between 10,000 and 100,000 population equivalent are required to provide secondary treatment, which typically involves biological processes to remove organic matter and nutrients.
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