Chapala Lake Lacustre
Chapala Lake Lacustre in Unknown, Mexico has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 0.4 m visibility. Phosphorus: 506.6 µg/L. Chlorophyll-a (algae): 4 µg/L.
- Clarity
- 0.4 m
Why Chapala Lake Lacustre has no A–F grade
Chapala Lake Lacustre 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.
Chapala Lake Lacustre is a lake in Unknown County, Mexico.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2021-10-15. 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 Chapala Lake Lacustre
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Very murky, less than 1.3 ft of visibility. Phosphorus level: 506.6 µg/L. Chlorophyll-a: 4 µg/L. Trophic State Index: 70.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.4 m | Not graded |
| Phosphorus | 506.6 µg/L | Not graded |
| Chlorophyll-a (Algae) | 4 µg/L | Not graded |
| Trophic State Index (TSI) | 70 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Chapala Lake Lacustre
Compare lakeside cabins, hotels, and vacation rentals near Chapala Lake Lacustre 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 Chapala Lake Lacustre
Frequently asked questions about Chapala Lake Lacustre
What is the water quality of Chapala Lake Lacustre?
- Chapala Lake Lacustre in Unknown, Mexico has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 0.4 m visibility. Phosphorus: 506.6 µg/L. Chlorophyll-a (algae): 4 µg/L.
Is Chapala Lake Lacustre safe to swim in?
- Chapala Lake Lacustre 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
217 measurements from 9 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
comisionnacionaldelagua217 samples · —
Analytical methods
- GEMStat OPEN / CC BY 4.0
Monitoring station identifiers (9)
MEX03074MEX03078MEX03081MEX03084MEX03085MEX03086MEX03121MEX03122MEX03135
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: 2021-10-15
Monitoring stations: 9