Is Embalse Ullibarri safe to swim in?

Embalse Ullibarri has official nutrient and clarity measurements, not a bacteria swim class and not a safety clearance. Algal blooms, currents, and depth are not covered. Always check local notices before swimming.

Embalse Ullibarri

Not yet rated

3.1 m clear · Mesotrophic

Limited DataMesotrophic

Embalse Ullibarri in Araba/Ãlava, Spain has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 3.1 m visibility. Phosphorus: 26 µg/L. Chlorophyll-a (algae): 2.3 µg/L.

Clarity: 3.1 m

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Why Embalse Ullibarri has no A–F grade

Embalse Ullibarri in Spain is published with the authority's own measurements, not a LakeQuality letter. official authority class; not a LakeQuality A–F letter Sampling here has recorded water clarity, phosphorus and algae (chlorophyll-a).

A letter on the LakeQuality scale would be an invention, not an official class. Everything below that has been measured is still reported on this page.

Monitoring: URA (the Basque Water Agency) and published Andalusian reservoir campaigns.

Embalse Ullibarri is a lake in Araba/Ãlava County, Spain.

Source: URA (the Basque Water Agency) and published Andalusian reservoir campaigns — not the EPA Water Quality Portal, last sampled 2025-11-06. Grade methodology: LakeGrade methodology.

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Swimming Safety

Not rated

Limited data

Not rated for swimming — there is not enough monitoring data to judge this lake

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Water quality measurements for Embalse Ullibarri

These readings exist but do not meet the evidence bar for an A–F grade — see why.

Good clarity, visible to about 10.2 ft. Phosphorus level: 26 µg/L. Chlorophyll-a: 2.3 µg/L. Trophic State Index: 44.

Metric	Value	Grade
Water Clarity (Secchi Depth)	3.11 m	Not graded
Phosphorus	26 µg/L	Not graded
Chlorophyll-a (Algae)	2.3 µg/L	Not graded
Trophic State Index (TSI)	44	Mesotrophic

Moderate nutrients, good water quality

Where to stay near Embalse Ullibarri

Compare lakeside cabins, hotels, and vacation rentals near Embalse Ullibarri in Araba/Ãlava, Spain — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.

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Fishing Embalse Ullibarri

→ Embalse Ullibarri fishing regulations (limits, seasons, special rules)

Frequently asked questions about Embalse Ullibarri

What is the water quality of Embalse Ullibarri?: Embalse Ullibarri in Araba/Ãlava, Spain has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 3.1 m visibility. Phosphorus: 26 µg/L. Chlorophyll-a (algae): 2.3 µg/L.
Is Embalse Ullibarri safe to swim in?: Embalse Ullibarri has official nutrient and clarity measurements, not a bacteria swim class and not a safety clearance. Algal blooms, currents, and depth are not covered. Always check local notices before swimming.

Explore Embalse Ullibarri across LakeGrade

Lake Fishing Forecast

Species activity outlook by water temperature and season

More lakes in Spain

Lakes in Spain

Official water quality for lakes in Spain

Lake water quality by country

EU bathing ratings and named-lake measurements

Where this data comes from

20 measurements from 1 monitoring station, 2024–2025. Retrieved from the listed programme (not the EPA Water Quality Portal). See data sources on 2026-08-20.

Collected and reported by

URA / Agència Vasca del Aguaura-es20 samples · —

Analytical methods

URA UBEGI reservoir monitoring

Monitoring station identifiers (1)

ULL-EMB

Authority classifications are stored separately from LakeQuality A–F letters and are never blended. See how grades are calculated and data sources.

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