ETAR de Caletillas - Primary Wastewater Treatment Plant in Candelaria, Tenerife, Spain

ETAR de Caletillas is a wastewater treatment plant located in Las Caletillas, Candelaria, on the island of Tenerife in the Canary Islands, Spain. The plant serves a population of 2,442 and has a designed capacity of 10,000 m³/day, with an average discharge volume of 442.61 m³/day. The plant provides primary treatment, which involves physical processes such as sedimentation to remove solids. As a small agglomeration in Spain, it operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires appropriate treatment for discharges into coastal waters. The plant's location within 10 km of the coast means it must meet standards for sensitive areas. The treated effluent is discharged into the Atlantic Ocean near the southeastern coast of Tenerife. The surrounding marine environment supports diverse aquatic life and is important for local tourism and fisheries. The plant plays a key role in protecting coastal water quality in the region.

The plant discharges into the Atlantic Ocean off the southeastern coast of Tenerife, part of the Canary Islands archipelago. The coastal waters are ecologically sensitive, supporting seagrass meadows and marine biodiversity. The discharge contributes to nutrient loading in a region where tourism and marine ecosystems depend on clean water. The plant's location in a volcanic island setting with limited freshwater resources underscores the importance of managing wastewater to prevent eutrophication and protect coastal habitats.