CONON BRIDGE WWTP, Dingwall, Scotland - Secondary Treatment Plant

CONON BRIDGE WWTP is a municipal wastewater treatment facility located in Corntown, near Dingwall in the Highland region of Scotland, United Kingdom. It serves a population of approximately 2,474 people, classifying it as a small agglomeration under Scottish water regulations. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. It has a designed capacity of 4,000 m³/day and currently discharges 550.80 m³/day of treated effluent. The treated wastewater is discharged into the local water environment, ultimately draining into the Cromarty Firth, a coastal inlet of the Moray Firth in the North Sea. This area supports diverse marine life and is an important ecological zone for migratory birds and fish species.

The plant discharges into the Cromarty Firth, a sheltered coastal inlet that connects to the Moray Firth and the North Sea. This estuary supports rich biodiversity, including salmon and sea trout populations, and serves as a key habitat for wintering waterfowl. The secondary treatment provided helps protect the sensitive marine environment from nutrient pollution.