The question visitors to Tenerife are increasingly asking before they book is one that would have seemed unusual a few years ago: is the water actually safe to swim in? It is a fair and important question, and one that deserves a straightforward, evidence-based answer rather than either alarming exaggeration or reassuring dismissal. The situation is genuinely complicated, varies significantly by location and season, and is in the middle of a politically charged response from local and national authorities.

The Scale of the Pollution Problem

The water quality crisis affecting parts of Tenerife is not a tabloid invention. In late 2025, the Court of Justice of the European Union formally condemned Spain for failing to comply with the EU’s Urban Wastewater Treatment Directive, identifying at least 12 specific locations on Tenerife where sewage collection, treatment, and discharge into coastal waters was either inadequate or entirely absent. [1] This followed years of documented failures. Environmental analysis cited by campaigners estimated that approximately 57 million litres of wastewater are discharged into Canary Islands seas every day, equivalent in volume to around 17 Olympic swimming pools. [2]

The consequences became impossible to ignore in 2024 and 2025. Playa Jardín, a well-known black-sand beach in Puerto de la Cruz on the island’s north coast, was closed for almost a year after E. coli levels in the water significantly exceeded safe limits. Investigations revealed fractured discharge pipes, pumping stations operating without legal authorisation, and a wastewater treatment plant that had gone years without the mandatory inspections and repairs. [3] In August 2025, the Public Prosecutor’s Office took the unusual step of charging six officials — including a former mayor of Puerto de la Cruz and the island’s former Tourism Department head — with environmental negligence and mismanagement of public infrastructure. [3]

The Spanish environmental NGO Ecologistas en Acción, which publishes an annual “Black Flag” report ranking the worst-managed coastal zones in Spain, awarded black flags to both Playa Jardín and Puertito de Adeje in its 2025 edition. [4] Puertito de Adeje, on the island’s southwest coast, was flagged not for E. coli but for what the organisation described as poor management in relation to new luxury coastal development and an underwater garden project that critics argue threatens endangered marine species. [4]

Storm events have made the underlying infrastructure problems dramatically visible. When Storm Claudia brought heavy rainfall in November 2025, drainage systems in Garachico and Las Américas were overwhelmed, sending wet wipes, oils, and other debris onto the shore. Beachgoers in Las Américas reported finding white, greasy masses on the sand, which chemists explained as the product of soaps and oils in wastewater reacting when pushed out to sea. [5] The Canary Islands government’s own discharge register, updated in 2025, recorded 403 coastal discharge points across the archipelago, with more than half operating without full authorisation. [1]

The Response: €81 Million and a 2030 Target

In February 2026, Tenerife’s Island Council formally presented an €81 million infrastructure plan designed to address these failures over a four-year period running through 2030. The plan covers modernising outdated wastewater networks, increasing treatment capacity, preventing unauthorised coastal discharges, and improving coordination between the island’s municipalities, which have historically operated fragmented and sometimes incompatible sanitation systems. [6] Vice President Lope Afonso framed the initiative around a “zero waste” ambition and called on all local municipalities to participate in the 2027-2030 Cooperation Plan. [6]

The plan has been welcomed cautiously by environmental groups. The Tenerife Association of Friends of Nature (ATAN), which was among the first organisations to raise public alarms about the contamination crisis in early 2026, has called for more transparency about the actual scale of coastal pollution and demanded that tourists be given honest information about water quality at specific beaches rather than generic reassurances. [1] This tension between the island’s economic dependence on tourism and the imperative to communicate environmental problems honestly is not going away quickly.

Where Is It Actually Safe to Swim?

The water quality situation varies significantly across Tenerife’s coastline, and not all beaches are affected equally. The problems documented in official reports are concentrated primarily in the north of the island, around Puerto de la Cruz and parts of the northeast coast, and in specific southern locations where infrastructure has struggled to keep pace with resort development.

The southern resort strip between Los Cristianos and Costa Adeje generally maintains higher water quality, supported by more recently built sanitation infrastructure and EU Blue Flag certification at several beaches. Blue Flag status, awarded annually by the Foundation for Environmental Education, requires compliance with strict water quality testing, environmental management standards, and safety requirements — making it the most reliable indicator of consistently clean swimming water available to visitors. [7]

Practical guidance for 2026 visitors: check the current flag status at your specific beach on arrival, not the status from a previous season. Red flag means swimming is forbidden, regardless of the reason. Avoid swimming within 48 hours of heavy rainfall anywhere on the island, as storm runoff affects even beaches that are generally well managed. The north coast, including the Puerto de la Cruz area, carries higher current risk than the southwest. Beaches within the southern resort area with active Blue Flag certification — including Playa de Troya, Playa del Duque, and Las Vistas in Los Cristianos — are your safest options while the infrastructure improvements work their way through the system.

Looking Ahead

Tenerife’s coastal pollution crisis is real, but it is being taken seriously in a way it was not a few years ago. EU legal pressure, criminal charges against officials, a significant funding commitment, and genuine civic pressure from environmental organisations have combined to produce a political response with specific targets and timelines. Whether that response is adequate, and whether it moves fast enough to protect both public health and the island’s reputation, is a question that will be answered in the coming years.

What is certain is that the era of uncritical optimism about Tenerife’s beach water quality is over. Visitors deserve accurate information, and the island’s long-term interests as a destination are better served by honest communication than by silence.

Sources

1. BritBrief: Health alert for Canary Islands — tourists warned about beach water pollution, britbrief.co.uk, January 2026
2. National World: Warning to avoid 48 Black Flag beaches in Spain, nationalworld.com, June 2024
3. DaNews.eu: Prosecutor charges six officials over pollution at Playa Jardín in Tenerife, August 2025
4. Travel Tomorrow: Tenerife set to invest €81 million to clean up island’s coastline and reputation, traveltomorrow.com, February 2026
5. Canarian Weekly: Waste and pollution wash up on Tenerife’s coastline again, canarianweekly.com
6. Travel and Tour World: Tenerife Plans to Invest Eighty Million Euros in Overhauling Water and Sanitation Infrastructure, travelandtourworld.com, February 2026
7. Curious Expeditions: Is the sea clean in Tenerife?, curiousexpeditions.org, March 2026

Editor’s Note: Why We Are Featuring Iran Now

Iran is once again dominating headlines.

From widespread public demonstrations that surged across Iran in late 2025 into early this year, to the current escalation and the breaking of war, the country is being discussed globally in the context of politics, conflict, and human suffering. The loss of life and instability unfolding are real and devastating. Nothing in this feature is intended to diminish that reality.

But there is something else that often goes unspoken.

For years, inside and outside of environmental circles, people have quietly asked me a question. Sometimes with curiosity. Sometimes with hesitation. Sometimes almost with guilt.

“What is actually there?”

They were referring to biodiversity.

In today’s world, there is pressure to already know. When the breadth of human knowledge appears to sit at our fingertips, asking basic questions can feel uncomfortable. If a place overlaps with your professional field or your moral concern, you are expected to understand it fully.

Curiosity, however, should never carry shame.

At SEVENSEAS Media, we see questions as bridges. When a region becomes defined only by conflict, it becomes even more important to remember that it is also defined by landscapes, species, ecosystems, culture, and people who have lived in relationship with nature for millennia.

Iran is not only a geopolitical flashpoint. It is a country of vast mountain ranges, ancient forests, wetlands, deserts, coral communities, migratory flyways, and one of the most strategically significant marine corridors in the world. It sits at the intersection of terrestrial and marine biodiversity, connecting ecosystems across Central Asia, the Caucasus, the Arabian Peninsula, and the Indian Ocean.

It is home to coastal communities whose fishing traditions stretch back centuries, to wetlands that host migratory birds crossing continents, and to marine systems that sustain life far beyond their shorelines.

This feature has been in development for some time. In light of current events, we believe it is important to move forward thoughtfully and with care.

Education is not a distraction from suffering. It is part of long term resilience.

At SEVENSEAS Media, we promote education and peace across cultures and living in harmony with nature. We believe that understanding biodiversity can humanize places that are otherwise reduced to headlines. Conservation, at its best, transcends politics and builds shared responsibility for the natural world.

In the articles that follow, we explore the geography of Iran, its terrestrial biodiversity, its migratory importance, and its ocean and coastal ecosystems. We touch on traditional fishing cultures, current pressures, conservation challenges, and the organizations working to protect what remains.

As always, we are not here to simplify complexity. We are here to make space for informed curiosity and careful understanding.

In moments of conflict, it can feel easier to look away. We choose instead to look closer, and to recognize that ecological systems persist regardless of political borders.

This story is developing rapidly. Details may shift as the situation evolves. Last verified: March 3, 2026.

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The images of burning tankers and military strikes feel distant when you are reading them on your phone over morning coffee. But the Strait of Hormuz crisis is not a story that will stay overseas. It is already in motion toward your fuel pump, your grocery store, and your electricity bill. The question is not whether you will feel its effects, but when, and how significantly.

This is not a call to panic. It is a call to understand. Here is what is happening, what it means for daily life, and what you can do about it.

Understanding the Ripple

The Strait of Hormuz handles approximately 20 million barrels of oil per day, representing roughly one-fifth of global supply. It also carries nearly 20% of the world’s liquefied natural gas trade, with the vast majority originating from Qatar. When this corridor shuts down, even partially, the consequences cascade through interconnected systems in ways that are not always immediately obvious.

Fuel prices are the most visible and fastest-moving consequence. Brent crude has already jumped approximately 10%, and analysts warn that sustained disruption could push prices above $100 per barrel, levels not seen since the aftermath of Russia’s invasion of Ukraine in 2022. For consumers, this translates to higher prices at the pump, typically with a short delay as wholesale costs filter through to retail. Countries that adjust fuel prices monthly may see a lag of weeks; those with market-based pricing will feel it sooner.

Shipping costs follow closely behind. CMA CGM has already imposed an Emergency Conflict Surcharge ranging from $2,000 to $4,000 per container, effective March 2. Rerouting vessels around the Cape of Good Hope adds 15 to 20 days to transit times between Asia and Europe, driving up fuel consumption, insurance premiums, and operational costs for every carrier on those routes. Freight rate increases of 25% to 30% are being projected for companies dealing in international trade. With both the Strait of Hormuz and the Red Sea now under simultaneous pressure, there is no quick alternative.

Food prices will be the slowest to move but potentially the most deeply felt. Higher energy costs raise the price of fertilizer production, which relies on natural gas as both an energy source and a chemical feedstock. That cost increase works its way into agricultural inputs, then into food processing, packaging (which depends on petroleum-based plastics), refrigerated transport, and finally retail pricing. Import-dependent economies will feel this most acutely. For nations in the Gulf region that rely heavily on imported food, the disruption is doubly compounded: both the energy to produce food and the shipping routes to deliver it are under pressure simultaneously.

What This Actually Means for You

We could list the usual advice here: drive less, buy local, keep some extra staples on hand. Some of that is reasonable enough if you are already headed to the shops. But we think it is more useful to be direct about what this kind of crisis actually looks like from a household perspective, because the biggest risk is not running out of anything. It is making bad decisions based on bad information.

Most of the cost increases heading your way are not something you can opt out of. When Brent crude moves, fuel prices follow. When container surcharges jump $2,000 to $4,000 per unit, those costs get passed along through supply chains that touch everything from packaging plastics to refrigerated transport. The question is not whether prices will rise but how quickly, how steeply, and for how long, and those answers depend on how the military and diplomatic situation evolves in the coming weeks, not on anything happening in your kitchen.

What you can do is calibrate your expectations. Fuel costs will move first, likely within days. Food prices will lag by weeks or months, and any dramatic grocery increases in the first week of this crisis almost certainly reflect opportunistic repricing rather than genuine cost transmission. Knowing that difference protects you from panic and from accepting inflated prices as inevitable when they may not be.

You can also be disciplined about your information sources. The Joint Maritime Information Center, Lloyd’s List, and established international wire services are reporting verified data. Social media is generating speculation at industrial scale. The gap between the two will widen as this crisis continues, and the most regrettable financial decisions, whether personal or political, tend to get made in the fog of the first 72 hours.

Finally, and this matters to us as an ocean publication, pay attention to who is most exposed. It is not the consumer adjusting a commute. It is the fishing communities along the Persian Gulf whose fuel, bait, and export markets are all disrupted at once. It is the populations in Gulf states that import the vast majority of their food through the very shipping lanes now under threat. It is the seafarers on 150-plus tankers anchored in a conflict zone with no departure date. Their story is the full story of what a maritime crisis costs, and it is the story we will keep covering.

The Ocean Connection

At SEVENSEAS, we believe that every geopolitical crisis carries an environmental dimension that too often gets buried beneath the economic and security headlines. The Persian Gulf is not just an energy corridor. It is a living marine ecosystem that supports endangered species, sustains fishing communities, and holds scientific secrets about how coral reefs might survive a warming planet. The decisions being made in the Strait of Hormuz this week will shape the health of that ecosystem for decades to come.

We will continue following this story not only because of its implications for oil markets and global shipping, but because the ocean always pays a price in wartime, and someone needs to be watching.

Written by: Junior Thanong Aiamkhophueng

Attribution: This article draws on economic analysis from Kpler’s market intelligence report on Strait of Hormuz supply disruption and commodity pricing; Gulf News reporting on projected impacts to UAE fuel, grocery, and consumer prices, including commentary from economists on inflationary transmission; Al Jazeera’s analysis of EIA data on daily oil transit volumes and Asian market dependency; SpecialEurasia’s assessment of maritime blockade economics and LNG supply disruption; ESM Magazine’s analysis of European grocery retail and FMCG supply chain vulnerability; The Conversation’s academic perspective on chokepoint economics; Automotive Manufacturing Solutions’ reporting on global logistics rerouting and container surcharge impacts; the Cyprus Mail’s coverage of consumer preparedness and profiteering warnings; gCaptain’s operational data on CMA CGM Emergency Conflict Surcharges and shipping line suspensions; and the Middle East Briefing’s historical comparison of energy crisis pricing patterns. Container ship photo via Wikimedia Commons. For further reading, visit Kpler, the U.S. Energy Information Administration (EIA), and the International Energy Agency (IEA).

Meet The Cover Conservationist is a recurring SEVENSEAS feature that spotlights inspiring and influential people working at the forefront of ocean conservation.

Beyond the research papers, campaigns, and headlines, this series offers a more personal look at the people behind the work, exploring what drives them, challenges them, and keeps them hopeful for the future of our ocean. If there’s a conservationist you’d love to see featured on a future cover, we invite you to submit a short nomination (around 250 words) to info@sevenseasmedia.org. We receive many outstanding submissions, and while not all can be selected for publication, each is carefully considered.

Below you’ll find the merciless interrogation designed to give readers insight into our conservationist’s professional journey and the human side of life in ocean conservation. We only ask fearlessly candid, no-holds-barred questions, so get ready for a brutally honest, nail-biting interview.

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1. To get our readers acquainted, why don’t you tell us just a little about yourself, what motivates you and what you are working on.

Jacqueline: I’m a second-year master’s degree student in the University of Rhode Island’s Graduate School of Oceanography. My research focuses on water quality and aquaculture, specifically investigating how water quality and gear type affect oyster growth in Narragansett Bay, Rhode Island. This work is driven by my interest to collaborate with oyster farmers and conduct research that benefits the aquaculture industry.

2. What was the moment or influence that first pulled you toward ocean conservation? Tell us about that.

Jacqueline: During college, I spent a summer along the coast of Maine assisting with lobster and scallop research projects. That experience showed me how closely science, industry, and coastal communities are connected. Working on the waterfront and interacting directly with fishermen helped me see that ocean conservation isn’t just about ecosystems; it’s also about supporting the people and livelihoods that depend on them.

3. Was there a specific place, species, experience, mentor, job, or challenge that shaped your career path?

Jacqueline: My first job after earning my bachelor’s degree was on Catalina Island, California, where I worked as a marine science instructor. It was a dynamic, adventurous, and rewarding job, one that continues to impact me today. I learned how to be an educator, communicate science, adapt quickly, and find the fun in challenging moments.

4. How do science and storytelling intersect in your work?

Jacqueline: The water quality dataset from my project helps oyster farmers understand seasonal trends in Narragansett Bay. By pairing quantitative data with observations from oyster farmers, we can tell a more complete story about what works, guide future research, and strengthen Rhode Island’s aquaculture industry through collaboration.

5. What’s one misconception people often have about your field?

Jacqueline: One common misconception people have about oceanography is that it entails just being out on a boat conducting field work. A lot of the work happens behind a computer, analyzing data, writing, securing funding, and collaborating across disciplines. It’s an ever-changing balance of field, lab, and desk work.

6. What part of your work feels most urgent today?

Jacqueline: Continued collaboration feels especially urgent, specifically uplifting the voices of industry members, such as oyster farmers, to identify research questions that are most relevant and impactful.

7. What achievement are you most proud of, even if few people know about it?

Jacqueline: I decided to apply to graduate school nine years after earning my undergraduate degree. Leaving the workforce and returning to student life was a big shift, and I’m proud to have taken that step. While I’m older than many of my peers, I wouldn’t change my timeline. Professional (and personal) growth isn’t linear, and there are infinite ways to get to where you want to go.

8. What keeps you going when conservation feels overwhelming?

Jacqueline: Being in graduate school, I’m surrounded by a large community of people who are deeply motivated. Being surrounded by that energy and commitment helps me stay focused, and reminds me that change is possible, even when progress feels slow.

9. What’s something the public rarely sees about how conservation really works?

Jacqueline: One thing the public rarely sees is just how complex and unpredictable conservation science can be. There are countless variables, including weather, mechanical issues, staffing, and funding, that we navigate every day. Carrying out research often means constantly adjusting and getting creative.

10. What’s one hard truth about ocean conservation we need to face?

Jacqueline: Climate change and environmental stressors disproportionately impact marginalized and coastal communities. Their voices and needs are often overlooked, yet they are on the frontlines of these challenges. Effective conservation requires listening to these communities, gathering their perspectives, and developing real solutions that will protect future generations.

11. What advice would you give your younger self entering this field?

Jacqueline: Everyone around you has something to teach you. Take the time to listen, ask questions, and build genuine connections.

12. Where do you realistically hope your work will be in 5 to 10 years?

Jacqueline: While my master’s research is ending, I hope that future research in Rhode Island continues to expand and support sustainable aquaculture. I’d love to see more state funding for projects that benefit both oysters and kelp, stronger partnerships between researchers and industry, and initiatives such as an experimental aquaculture farm.

13. What innovation excites you most in ocean conservation?

Jacqueline: I’m excited to see how aquaculture can become more “climate-ready.” For example, breeding or selecting oyster strains that are resilient to warming waters and ocean acidification could help farmers adapt to changing conditions.

14. Ocean sunrise or sunset? Any reason why?

Jacqueline: Sunrise, preferably viewed from a surfboard.

15. If you could be any marine animal, what would you be?

Jacqueline: Humpback whale. You can’t beat the ability to echolocate.

16. Coffee or tea (or what else?) in the field?

Jacqueline: Matcha latte.

17. Most unexpected or interesting place your work has taken you?

Jacqueline: I led marine conservation programs in the Dominican Republic for a summer. We partnered with local nonprofits on coral and mangrove restoration. It was interesting to see conservation happening in a different context. I loved learning about different approaches and realizing how much we can share and learn from one another across communities and countries.

18. One book, film, or documentary everyone should experience?

Jacqueline: Blue Planet 1 and 2.

19. What does a perfect day off look like?

Jacqueline: A bike ride to the beach, body surfing in warm summer waves, and low tide sea glass hunting.

20. One word you associate with the future of the ocean?

Jacqueline: Collaboration.

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• – Meet Dr Enrico Gennari, the January Cover Conservationist