← HomeConsell declares emergency over treatment plant subsidence in Dénia area
The Consell confirmed on Thursday the emergency declaration to speed up repairs to the Dénia-Ondara-Pedreguer wastewater treatment plant, where subsidence threatens the facility following the rupture of a collector. The work has a budget of €473,554 and a timeframe of seven months.
La Marina Times newsroom
Thursday 1 October 2026, 13:28 · 2 min read
AIWritten with AI assistance from the sources cited and reviewed by our editors. How we work Subsidence near the pre-treatment building
The Consell approved the emergency declaration for works to repair the Dénia and Ondara pumping lines at the Dénia-Ondara-Pedreguer wastewater treatment station. The rupture of the Pedreguer collector, which runs at great depth, caused substantial ground subsidence next to the facility's pre-treatment building.
The Public Entity for Wastewater Treatment (EPSAR) detected failures in the Dénia and Ondara pumping lines in July, near the same building. As ground subsidence occurred, temporary solutions were applied to prevent spills.
The technical solution
The chosen solution involves relocating the Pedreguer collector's pumping station within the treatment plant grounds, which will avoid intervening in the problematic section and stabilise the subsidence area after bypassing the pipeline. The works include the installation of self-priming motor pumps, with two units, one as backup, to guarantee service.
The work also includes demolition, earthmoving, civil works, installation of electromechanical equipment and relocation of the Pedreguer pumps. The works also provide for cleaning and remediation of the rupture zone, backfilling with gravel and flowable concrete, and transport of surplus material to landfill.
Budget and timeframe
The total budget for the work is €473,554, of which €423,157 corresponds to the execution of works and €50,396 to project management. The estimated execution timeframe is seven months.
The Dénia-Ondara-Pedreguer treatment plant began operations in 1997 and serves these three Marina Alta municipalities. Its maximum designed treatment capacity is 82,133 population equivalents, with a flow of 15,400 cubic metres per day.
