Water quality
Monitoring of the Ostreopsis micro-algae: samples, history and reports.
Concentration trends
Logarithmic scale. Zero values and "below detection threshold" values cannot be plotted on this scale (see the full table below). Dark red dots indicate a beach closure.
Approved testimonials
14- 🏊 Swimming (1 h to 3 h) on 14/08/2026 · symptoms on 16/08/2026🟠 Moderate🤢 Nausea
- 🏊 Swimming (30 min to 1 h) on 12/08/2026 · symptoms on 14/08/2026🟢 Mild🤕 Headache🤢 Nausea
- 🏊 Swimming (Less than 30 min) on 12/08/2026 · symptoms on 13/08/2026🔴 Severe🤕 Headache🌡️ Fever / chills
- 🏊 Swimming (More than 3 h) on 10/08/2026 · no symptoms
- 🏊 Swimming (30 min to 1 h) on 10/08/2026 · no symptoms
- 🏄 Surfing (Less than 30 min) on 08/08/2026 · symptoms on 08/08/2026🔴 Severe🫁 Breathing difficulty
- 🤿 Diving (30 min to 1 h) on 05/08/2026 · symptoms on 05/08/2026🔴 Severe💫 Dizziness😷 Cough
- 🏊 Swimming (More than 3 h) on 03/08/2026 · symptoms on 03/08/2026🟠 Moderate👁️ Irritated eyes🤕 Headache
- 🏊 Swimming (30 min to 1 h) on 27/07/2026 · no symptoms
- 🏄 Surfing (Less than 30 min) on 17/07/2026 · symptoms on 17/07/2026🟠 Moderate👁️ Irritated eyes👃 Throat / nose irritation🤢 Nausea
- 🏊 Swimming (1 h to 3 h) on 10/07/2026 · symptoms on 10/07/2026🟢 Mild🤕 Headache👁️ Irritated eyes💪 Muscle aches
- 🌊 Open-water swimming (30 min to 1 h) on 06/07/2026 · symptoms on 08/07/2026🟢 Mild🌡️ Fever / chills
- 🚶 Walk along the seashore (Less than 30 min) on 05/07/2026 · no symptoms
- 🚶 Walk along the seashore (30 min to 1 h) on 03/07/2026 · symptoms on 03/07/2026🟠 Moderate👃 Throat / nose irritation😷 Cough🩹 Skin irritation
Testimonials are anonymous and shown after moderation. Correlation does not imply causation.
Full sampling history
| Sample | Result | Cells/L | siamensis | ovata | Temp. | Status |
|---|---|---|---|---|---|---|
| 02/07/2026 | 03/07/2026 | 1 640 | 2% | 98% | 23.3°C | Low |
The beach
Tides, daylight and practical information — unrelated to water quality.
Data sources
- Official samples: Communauté d'Agglomération Pays Basque (CAPB) — the only ones used for status and closures.
- Tides: Open-Meteo forecasts (indicative).
- General beach information: OpenStreetMap contributors (ODbL) — may be incomplete or out of date.