Curtain Presa la Amistad
Curtain Presa la Amistad in Unknown, Mexico has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 1.5 m visibility. Phosphorus: 24.2 µg/L. Chlorophyll-a (algae): 4.8 µg/L.
- Clarity
- 1.5 m
Why Curtain Presa la Amistad has no A–F grade
Curtain Presa la Amistad 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 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: the National Water Commission of Mexico (CONAGUA), via UNEP GEMS/Water.
Curtain Presa la Amistad is a lake in Unknown County, Mexico.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2020-09-11. 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 Curtain Presa la Amistad
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Murky, only visible to about 5 ft. Phosphorus level: 24.2 µg/L. Chlorophyll-a: 4.8 µg/L. Trophic State Index: 50.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.53 m | Not graded |
| Phosphorus | 24.2 µg/L | Not graded |
| Chlorophyll-a (Algae) | 4.8 µg/L | Not graded |
| Trophic State Index (TSI) | 50 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Curtain Presa la Amistad
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Fishing Curtain Presa la Amistad
Frequently asked questions about Curtain Presa la Amistad
What is the water quality of Curtain Presa la Amistad?
- Curtain Presa la Amistad in Unknown, Mexico has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 1.5 m visibility. Phosphorus: 24.2 µg/L. Chlorophyll-a (algae): 4.8 µg/L.
Is Curtain Presa la Amistad safe to swim in?
- Curtain Presa la Amistad 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
19 measurements from 1 monitoring station, 2016–2020. Retrieved from UNEP GEMS/Water GFQA (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- Comisión Nacional del Agua
comisionnacionaldelagua19 samples · —
Analytical methods
- GEMStat OPEN / CC BY 4.0
Monitoring station identifiers (1)
MEX00404
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: 2020-09-11
Monitoring stations: 1