Water quality in Guía de Isora

The political party Podemos Canarias has raised concerns about the proposed Costa San Juan tourist project in Playa San Juan (Guía de Isora), according to Tenerife Weekly and El Tambor on 23 September 2026. The party questions the planned drainage system using an absorption well because of its proximity to the protected Teno-Rasca marine area (ZEC Franja Marina Teno-Rasca), and points to possible effects on protected species and habitats. Podemos also argues that the project's 2019 environmental impact statement may no longer be valid and asks the authorities to clarify this. These are the party's statements; no pollution, environmental damage or bathing restriction has been established. This entry is separate from the Playa San Juan wastewater outfall.

Entemanser has removed around 200 tonnes of wet wipes and other waste from the 34 wastewater pumping stations it operates in Adeje, Guía de Isora and Granadilla de Abona during 2026. The work has required more than 6,500 hours. A build-up of this waste can reduce pump efficiency, cause blockages and, in serious cases, contribute to sewage overflows or discharges.

El Día reports that the start-up of the Los Letrados plant (Granadilla de Abona) and the Oeste plant (Guía de Isora) raises Tenerife's treatment capacity to more than 35 cubic hectometres a year, over 50% of the island's wastewater flow, extending coverage by more than 80,000 inhabitants. Los Letrados involved an investment of 17.6 million euros and includes 10 kilometres of collectors serving Granadilla town, El Salto and San Isidro, plus an 8.5-kilometre pumping line from the coast (Los Abrigos and La Mareta) to the Ensenada Pelada treatment and pumping station. The article places the works within the Cabildo de Tenerife "zero discharge" strategy and describes Granadilla as a municipality particularly affected by discharges to the sea.

Infrastructure context entry. The article also mentions other works under way (Montaña Reverón in Arona, the Buenos Aires extension in Santa Cruz and the new Punta Brava plant in Puerto de la Cruz) and a joint Acuaes-Cabildo investment of 233.5 million euros. This action does not in itself imply any change in current bathing-water quality.

Investment: Depuradora de Los Letrados, según El Día / Los Letrados plant, per El Día

ACUAES awarded works to connect Chío to the Tenerife Oeste sanitation system. The project includes approximately 5.3 kilometres of main collector infrastructure and the connection from Chío.

This infrastructure action does not in itself imply any change in current bathing-water quality.

Investment: Aproximado / Approximate

The Cabildo is advancing six major hydraulic projects across Tenerife as part of a sanitation and wastewater treatment programme aimed at improving wastewater treatment, reducing discharges into the sea and increasing the reuse of treated water.

The European Commission took Spain to the Court of Justice of the European Union over failures to comply with Directive 91/271/EEC on urban waste water treatment. The case covers several agglomerations in Tenerife, among them Adeje-Arona, Añaza, Candelaria, Golf del Sur, Guía de Isora Litoral, La Esperanza-La Laguna Sur-Santa Cruz-Valles, Puerto de Santiago-Playa la Arena, San Isidro-Litoral, Sueño Azul and Valle de la Orotava.

An infringement procedure is brought against Spain and describes unfulfilled obligations at agglomeration level, not the water quality at a beach on a given day. The required works and connections fall to different administrations.