Curtain Dam Cofradia
Curtain Dam Cofradia in Unknown, Mexico has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 0.2 m visibility. Phosphorus: 711 µg/L. Chlorophyll-a (algae): 12.5 µg/L.
- Clarity
- 0.2 m
Why Curtain Dam Cofradia has no A–F grade
Curtain Dam Cofradia 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 Dam Cofradia is a lake in Unknown County, Mexico.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2020-07-28. Grade methodology: LakeGrade methodology.
Watch Curtain Dam Cofradia water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Curtain Dam Cofradia
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Very murky, less than 0.7 ft of visibility. Phosphorus level: 711 µg/L. Chlorophyll-a: 12.5 µg/L. Trophic State Index: 79.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.21 m | Not graded |
| Phosphorus | 711 µg/L | Not graded |
| Chlorophyll-a (Algae) | 12.5 µg/L | Not graded |
| Trophic State Index (TSI) | 79 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Curtain Dam Cofradia
Compare lakeside cabins, hotels, and vacation rentals near Curtain Dam Cofradia 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.
Top-rated places to stay near Curtain Dam Cofradia
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Fishing Curtain Dam Cofradia
Frequently asked questions about Curtain Dam Cofradia
What is the water quality of Curtain Dam Cofradia?
- Curtain Dam Cofradia in Unknown, Mexico has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 0.2 m visibility. Phosphorus: 711 µg/L. Chlorophyll-a (algae): 12.5 µg/L.
Is Curtain Dam Cofradia safe to swim in?
- Curtain Dam Cofradia 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 Curtain Dam Cofradia across LakeGrade
More lakes in Mexico
Where this data comes from
17 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
comisionnacionaldelagua17 samples · —
Analytical methods
- GEMStat OPEN / CC BY 4.0
Monitoring station identifiers (1)
MEX00796
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: 2020-07-28
Monitoring stations: 1