Perch Lake
Guadalupe County, New MexicoView mapDirections
Not enough samples to grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). No letter yet. Here is what we do have.
- Limited data
Perch Lake in Guadalupe County, New Mexico is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 14.8 ft visibility. Chlorophyll-a (algae): 12.8 µg/L.
- Clarity
- 14.8 ft
- Chlorophyll-a
- 12.8 µg/L
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Stays near Perch Lake
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Watch Perch Lake’s letter
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Why Perch Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Perch Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity and algae (chlorophyll-a), but not phosphorus.
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by NMED and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Perch Lake is a lake in Guadalupe County, New Mexico.
Source: EPA Water Quality Portal sampling records, NMED, last sampled 2019-10-10. Grade methodology: LakeQuality methodology.
What Perch Lake is good for
From access and monitoring records, not editorial picks.
- Clear water14.8 ft of visibility
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Perch Lake
These readings exist but are not enough for an A–F grade — see why.
Good clarity, visible to about 14.8 ft. Chlorophyll-a 12.8 µg/L. TSI 47.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 14.8 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | 12.8 µg/L | Not graded |
| Trophic State Index (TSI) | 47 | Mesotrophic |
Moderate nutrients, good water quality
Fishing Perch Lake
Graded lakes near Perch Lake
Perch Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Guadalupe County
Frequently asked questions about Perch Lake
Where is Perch Lake?
- Perch Lake is a lake in Guadalupe County, New Mexico. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Perch Lake?
- Perch Lake in Guadalupe County, New Mexico is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 14.8 ft visibility. Chlorophyll-a (algae): 12.8 µg/L.
Is Perch Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Explore Perch Lake across LakeQuality
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Where this data comes from
4 measurements from 1 monitoring station, 2019. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- NM Environmental Dept./SWQB
21NMEX_WQX4 samples · 2019
Analytical methods
- 10200 H 2 ~ Chlorophyll a-b-c Determination by spectrophotometer
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.