IDL_MARESCA Wastewater Treatment Plant, Maresca, Tuscany

IDL_MARESCA is a former wastewater treatment plant located in Maresca, a frazione of San Marcello Piteglio in the Pistoia province of Tuscany, Italy. The plant was designed to serve the small mountain community in the Appennino Pistoiese area, with a capacity of 1,000 cubic meters per day. It provided secondary treatment, which is the standard biological treatment required under the EU Urban Waste Water Treatment Directive for agglomerations of this scale. The plant operated under Italy's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for discharges into freshwater and estuaries from agglomerations above 2,000 population equivalent. Although the plant is now closed, its design capacity suggests it served a small population typical of inland mountain settlements. The facility was likely managed by the local water authority or the Unione di comuni montani Appennino Pistoiese. Treated effluent from the plant would have been discharged into a local stream or river within the Reno River basin, which ultimately flows into the Adriatic Sea. The surrounding area is part of the Tuscan-Emilian Apennines, a region known for its forested slopes and biodiversity. The plant's closure may reflect consolidation of wastewater services or changes in local population dynamics.

The plant discharged into a watercourse within the Reno River basin, which flows northward through the Apennines and into the Adriatic Sea near the Po Delta. The receiving waters support aquatic life typical of mountain streams, including trout and other cold-water species. The area is ecologically sensitive due to its forested catchment and role in maintaining water quality for downstream communities and the Adriatic coastal zone.