Presa Peña Blanca
Presa Peña Blanca in Unknown, Mexico has official water-quality measurements, not a LakeQuality A–F grade. Phosphorus: 500 µg/L.
Why Presa Peña Blanca has no A–F grade
Presa Peña Blanca in Mexico 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 National Water Commission of Mexico (CONAGUA), via UNEP GEMS/Water.
Presa Peña Blanca is a lake in Unknown County, Mexico.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2021-11-29. 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 Presa Peña Blanca
These readings exist but do not meet the evidence bar for an A–F grade — see why.
No clarity data. Phosphorus level: 500 µg/L. Trophic State Index: 94.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 500 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 94 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Presa Peña Blanca
Compare lakeside cabins, hotels, and vacation rentals near Presa Peña Blanca in Unknown, Mexico — 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 Presa Peña Blanca
Frequently asked questions about Presa Peña Blanca
What is the water quality of Presa Peña Blanca?
- Presa Peña Blanca in Unknown, Mexico has official water-quality measurements, not a LakeQuality A–F grade. Phosphorus: 500 µg/L.
Is Presa Peña Blanca safe to swim in?
- Presa Peña Blanca 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
1 measurement from 1 monitoring station, 2021. Retrieved from UNEP GEMS/Water GFQA (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- Comisión Nacional del Agua
comisionnacionaldelagua1 sample · —
Analytical methods
- GEMStat OPEN / CC BY 4.0
Monitoring station identifiers (1)
MEX04984
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: 2021-11-29
Monitoring stations: 1