Overview
Novigrad Istarski wastewater treatment plant serves Grad Novigrad, Croatia, with primary treatment and a designed capacity of 33,000 m³/day. Located within 10 km of the Adriatic coast, it operates under EU Urban Waste Water Treatment Directive standa
The Novigrad Istarski wastewater treatment plant is located in Kastanija, near the town of Novigrad in Istria County, Croatia. It serves the municipality of Grad Novigrad and is designed with a capacity of 33,000 m³/day, indicating it handles a significant volume of wastewater from the local population and tourism sector. As a coastal plant with primary treatment, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires at least secondary treatment for discharges into sensitive areas like the Adriatic Sea. The plant's primary treatment level suggests it may need upgrades to meet EU standards for coastal discharges, especially given its proximity to the coast. The treated effluent is discharged into the Adriatic Sea, a semi-enclosed marine basin with limited water exchange, making it sensitive to nutrient pollution. The plant plays a key role in protecting the coastal waters of Istria, which support tourism, fisheries, and marine biodiversity. Proper treatment is essential to prevent eutrophication and safeguard the region's ecological and economic resources.
Environmental context
The plant discharges into the Adriatic Sea, a semi-enclosed basin connected to the Mediterranean. The coastal waters near Novigrad are part of a sensitive marine ecosystem that supports seagrass meadows, fish nurseries, and migratory bird routes. Nutrient inputs from wastewater can lead to algal blooms and oxygen depletion, threatening local biodiversity and the tourism-dependent economy. The plant's primary treatment provides limited nutrient removal, highlighting the need for advanced treatment to protect this ecologically important coastal zone.
Frequently asked questions
The plant is located in Kastanija, near Novigrad, in the municipality of Grad Novigrad, Istria County, Croatia.
The plant has a designed capacity of 33,000 m³ per day, serving the local population and seasonal tourism in the Novigrad area.
The plant discharges treated effluent into the Adriatic Sea, as it is located within 10 km of the coast. The discharge point is in a sensitive marine environment.
As a Croatian plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires at least secondary treatment for coastal discharges from agglomerations over 10,000 population equivalent.
For coastal plants like Novigrad Istarski, the EU directive mandates secondary treatment or equivalent to protect sensitive marine areas. Primary treatment alone may be insufficient, and upgrades are often required to meet nutrient removal standards.
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