Lake Powell Mid Channel Midway Between Trachyte Creek And Twomile Canyon
San Juan County, UtahView 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
Lake Powell Mid Channel Midway Between Trachyte Creek And Twomile Canyon in San Juan County, Utah is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 0.2 ft visibility. Phosphorus: 906 µg/L.
- Clarity
- 0.2 ft
- Phosphorus
- 906 µg/L
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Watch Lake Powell Mid Channel Midway Between Trachyte Creek And Twomile Canyon’s letter
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Why Lake Powell Mid Channel Midway Between Trachyte Creek And Twomile Canyon 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 Lake Powell Mid Channel Midway Between Trachyte Creek And Twomile Canyon, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity and phosphorus, but not algae (chlorophyll-a).
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 Utah DWQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Lake Powell Mid Channel Midway Between Trachyte Creek And Twomile Canyon is a lake in San Juan County, Utah.
Source: EPA Water Quality Portal sampling records, Utah DWQ, last sampled 2021-06-17. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
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Water quality measurements for Lake Powell Mid Channel Midway Between Trachyte Creek And Twomile Canyon
These readings exist but are not enough for an A–F grade — see why.
Very murky, less than 0.2 ft of visibility. Phosphorus 906 µg/L. TSI 103.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.2 ft | Not graded |
| Phosphorus | 906 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 103 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Fishing Lake Powell Mid Channel Midway Between Trachyte Creek And Twomile Canyon
Graded lakes near Lake Powell Mid Channel Midway Between Trachyte Creek And Twomile Canyon
Lake Powell Mid Channel Midway Between Trachyte Creek And Twomile Canyon has no grade, but these lakes within a short drive do.
Nearby Lakes in San Juan County
Frequently asked questions about Lake Powell Mid Channel Midway Between Trachyte Creek And Twomile Canyon
Where is Lake Powell Mid Channel Midway Between Trachyte Creek And Twomile Canyon?
- Lake Powell Mid Channel Midway Between Trachyte Creek And Twomile Canyon is a lake in San Juan County, Utah. 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 Lake Powell Mid Channel Midway Between Trachyte Creek And Twomile Canyon?
- Lake Powell Mid Channel Midway Between Trachyte Creek And Twomile Canyon in San Juan County, Utah is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 0.2 ft visibility. Phosphorus: 906 µg/L.
Is Lake Powell Mid Channel Midway Between Trachyte Creek And Twomile Canyon safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
4 measurements from 1 monitoring station, 2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Utah Department Of Environmental Quality
UTAHDWQ_WQX4 samples · 2021
Analytical methods
- Field Measurements
- Phosphorus by Colorimetry
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.