Cointzio Dam
Cointzio Dam in Unknown, Mexico has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 0.2 m visibility. Phosphorus: 502 µg/L. Chlorophyll-a (algae): 3.9 µg/L.
- Clarity
- 0.2 m
Why Cointzio Dam has no A–F grade
Cointzio 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, 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.
Cointzio Dam is a lake in Unknown County, Mexico.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2021-09-30. 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 Cointzio Dam
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: 502 µg/L. Chlorophyll-a: 3.9 µg/L. Trophic State Index: 73.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.21 m | Not graded |
| Phosphorus | 502 µg/L | Not graded |
| Chlorophyll-a (Algae) | 3.9 µg/L | Not graded |
| Trophic State Index (TSI) | 73 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Cointzio Dam
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Fishing Cointzio Dam
Frequently asked questions about Cointzio Dam
What is the water quality of Cointzio Dam?
- Cointzio Dam in Unknown, Mexico has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 0.2 m visibility. Phosphorus: 502 µg/L. Chlorophyll-a (algae): 3.9 µg/L.
Is Cointzio Dam safe to swim in?
- Cointzio 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
91 measurements from 4 monitoring stations, 2016–2021. Retrieved from UNEP GEMS/Water GFQA (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- Comisión Nacional del Agua
comisionnacionaldelagua91 samples · —
Analytical methods
- GEMStat OPEN / CC BY 4.0
Monitoring station identifiers (4)
MEX01377MEX01378MEX01379MEX01380
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: 2021-09-30
Monitoring stations: 4