Overview
THURSO STW serves approximately 9,700 people in Highland, Scotland, discharging treated wastewater into the local environment. The plant operates under UK regulations aligned with the EU Urban Waste Water Treatment Directive.
THURSO STW is a wastewater treatment plant located at Clardon Hill, Highland, in the Alba / Scotland region of the United Kingdom. It serves a population of around 9,700, placing it in the medium agglomeration category under UK regulatory frameworks. And it operates under the UK's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The facility is expected to meet national discharge standards. The treated effluent is discharged into a receiving water body that ultimately drains into the North Sea, likely via the Thurso River or nearby coastal waters. The area supports diverse aquatic life and is part of the broader Pentland Firth marine ecosystem, which is important for migratory fish and seabird populations.
Environmental context
The plant discharges into a watercourse that flows into the Pentland Firth, a strait connecting the North Atlantic Ocean and the North Sea. This coastal environment supports diverse marine life, including seabird colonies and migratory fish such as Atlantic salmon. The region's watershed is ecologically sensitive due to its proximity to the coast and the importance of maintaining water quality for both wildlife and local communities.
Frequently asked questions
THURSO STW is located at Clardon Hill, Highland, in the Alba / Scotland region of the United Kingdom, near the town of Thurso.
THURSO STW serves approximately 9,700 people, classifying it as a medium-sized agglomeration under UK wastewater regulations.
The plant discharges treated effluent into a local watercourse that flows into the Pentland Firth, a strait between the North Atlantic and the North Sea.
THURSO STW operates under the UK's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations of this size.
Under the EU Urban Waste Water Treatment Directive, plants serving between 2,000 and 10,000 people typically require secondary treatment, unless discharging into sensitive areas where tertiary treatment may be needed.
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