Albufeira Fronhas
Albufeira Fronhas in Unknown, Portugal has official water-quality measurements, not a LakeQuality A–F grade. Phosphorus: 10 µg/L.
Why Albufeira Fronhas has no A–F grade
Albufeira Fronhas in Portugal 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 phosphorus, but not water clarity 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: the Portuguese Environment Agency (APA), via UNEP GEMS/Water.
Albufeira Fronhas is a lake in Unknown County, Portugal.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2023-10-10. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Albufeira Fronhas
These readings exist but do not meet the evidence bar for an A–F grade — see why.
No clarity data. Phosphorus level: 10 µg/L. Trophic State Index: 37.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 10 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 37 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Albufeira Fronhas
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Fishing Albufeira Fronhas
Frequently asked questions about Albufeira Fronhas
What is the water quality of Albufeira Fronhas?
- Albufeira Fronhas in Unknown, Portugal has official water-quality measurements, not a LakeQuality A–F grade. Phosphorus: 10 µg/L.
Is Albufeira Fronhas safe to swim in?
- Albufeira Fronhas 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.
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Where this data comes from
46 measurements from 1 monitoring station, 2016–2023. Retrieved from UNEP GEMS/Water GFQA (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- European Environment Agency
europeanenvironmentagenc46 samples · —
Analytical methods
- GEMStat OPEN / CC BY 4.0
Monitoring station identifiers (1)
PRT00053
Authority classifications are stored separately from LakeQuality A–F letters and are never blended. See methodology and data sources.
Data Sources
Water quality data from the EPA Water Quality Portal
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion
Most recent sample: 2023-10-10
Monitoring stations: 1