Santa Rosa Cortina Dam
Santa Rosa Cortina Dam in Unknown, Mexico has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 0.7 m visibility. Chlorophyll-a (algae): 8.2 µg/L.
- Clarity
- 0.7 m
Why Santa Rosa Cortina Dam has no A–F grade
Santa Rosa Cortina Dam 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 and algae (chlorophyll-a), but not phosphorus.
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.
Santa Rosa Cortina Dam is a lake in Unknown County, Mexico.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2020-08-24. 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 Santa Rosa Cortina Dam
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Very murky, less than 2.1 ft of visibility. Chlorophyll-a: 8.2 µg/L. Trophic State Index: 59.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.65 m | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | 8.2 µg/L | Not graded |
| Trophic State Index (TSI) | 59 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Santa Rosa Cortina Dam
Compare lakeside cabins, hotels, and vacation rentals near Santa Rosa Cortina Dam 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 Santa Rosa Cortina Dam
Frequently asked questions about Santa Rosa Cortina Dam
What is the water quality of Santa Rosa Cortina Dam?
- Santa Rosa Cortina Dam in Unknown, Mexico has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 0.7 m visibility. Chlorophyll-a (algae): 8.2 µg/L.
Is Santa Rosa Cortina Dam safe to swim in?
- Santa Rosa Cortina Dam 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
15 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
comisionnacionaldelagua15 samples · —
Analytical methods
- GEMStat OPEN / CC BY 4.0
Monitoring station identifiers (1)
MEX03046
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: 2020-08-24
Monitoring stations: 1