A Spanish environmental campaign group has named and shamed seaside spots with problems, including chemical pollution, marine waste, over-development and sewage discharges.

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Talamanca Beach in Ibiza features on the list, which has been compiled by Ecologists in Action, after being singled out over the catastrophic damage done to underwater plants by boats anchoring illegally off the coast.

A treatment plant pumping salty wastewater into the sea is another issue for people to consider when heading to the popular beach destination.

El Amerador Beach in El Campello just north of Alicante has been given one of Ecologists in Action’s 48 black flags as well.

Disease-causing fecal pollution at the beach earned it the shameful marker, which was blamed on a nearby poorly-maintained pumping station.

The organisation highlighted two recent instances of human waste entering the sea at the Costa Blanca beach, one in March and one in April.

The Canary Islands, where thousands of locals took to the streets in April in an anti-mass tourism protest to highlight problems including ocean pollution, also got a drubbing in the report.

A spokesman for Ecologists in Action, a grassroots confederation of 300 ecological groups, said: “One of the biggest problems we are facing is the ‘touristification’ and urbanisation of our coast and this is a problem that especially affects the Canary Islands.”

Claiming its political leaders were prioritising business interests in a “suicidal race” and boasting about record tourism when its local population were suffering record poverty and unemployment, the organisation added: “The ecological footprint of the Canary Islands corresponds to that of a territory 27 times larger.

“In other words we need a territory 27 times larger to satisfy all the demands of the economic model and development of the archipelago.”

In a horror description of the situation on the most popular of the eight islands with British holidaymakers, the group claimed: “In Tenerife 57 million litres of wastewater are discharged directly into the sea every day, equivalent to 17 Olympics swimming pools of polluted water.

“The problem extends to all eight Canary Islands.

“Underwater outlets are discharging 24/7 365 days a year in all the islands’ archipelago.

“More than 90 per cent of the wastewater from urban, industrial and agricultural centres reaches the sea practically without treatment.”

The popular Playa Blanca beach in Lanzarote also received one of the group’s black flags this year.

That’s down to a sewage spill caused by a pumping station fault which led to the beach’s temporary closure in May.

Ecologists in Action warned that last month’s drama was not the first and described it as “common”, saying pumping treatment managers had blamed the problem on people flushing wet wipes and nappies down the toilet instead of putting them in the bin.

Meanwhile, pellets identified as dangerous to marine and human life have been flagged up as a problem on the Costa Dorada in Tarragona, which includes resorts like Salou.

Further north on the Costa Brava private boats have been blamed for damaging marine biodiversity.

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