DP01401102_CAIOLO_BACHET Wastewater Treatment Plant, Caiolo, Italy

DP01401102_CAIOLO_BACHET is an advanced wastewater treatment plant located in the small town of Caiolo, in the Lombardy region of northern Italy. Situated in the Valtellina valley, this facility serves a local population of 77 residents, reflecting its role in a sparsely populated alpine area. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC). For such a small agglomeration, the use of advanced treatment indicates a high level of environmental protection, likely due to the sensitivity of the receiving water body in this mountainous region. The treated effluent is discharged into local waterways that ultimately drain into the Adda River, a major tributary of the Po River. The Po River flows eastward into the Adriatic Sea, making this plant part of the broader Po basin ecosystem. The advanced treatment helps protect the fragile alpine aquatic environment and downstream water quality.

The plant discharges into the Adda River basin, which flows through the Valtellina valley before joining the Po River. The Po River then empties into the Adriatic Sea. This alpine watershed supports diverse aquatic life and is ecologically sensitive due to its mountainous terrain and seasonal flow variations. Advanced treatment ensures minimal nutrient and pollutant loading, safeguarding the local stream ecosystems and downstream habitats.