Moon Lake is a mesotrophic lake in Duchesne County, Utah. Water quality is graded B based on 2 sampling years through 2024. Compared to the 22 other monitored lakes in Duchesne County, Moon Lake ranks #9 for water quality.
Source: EPA Water Quality Portal sampling records, Utah DNR, last sampled 2024-08-21. Grade methodology: LakeGrade methodology.
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Moderate clarity, visible to about 9.5 ft. Chlorophyll-a: 2.7 µg/L. Trophic State Index: 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 9.5 ft | C |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 2.7 µg/L | A |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Moon Lake
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Fishing Moon Lake
Location
County Ranking
Ranked #9 of 23 lakes in Duchesne County
Cleaner Lakes Within 30 Miles
Moon Lake holds Grade B. One nearby lake has a higher grade.
See full comparison →Nearby Lakes in Duchesne County
Explore Moon Lake across LakeGrade
More Utah Lake Rankings
Other Grade B Lakes in Utah
Mesotrophic Lakes in Utah
More records, surveys & data sources
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-08-21
Monitoring stations: 1