Nine Mile Reservoir is a mesotrophic lake in Sanpete County, Utah. Water quality is graded B based on 2 sampling years through 2020. Compared to the 12 other monitored lakes in Sanpete County, Nine Mile Reservoir ranks #9 for water quality.
Source: EPA Water Quality Portal sampling records, Utah DNR, last sampled 2020-08-03. 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 9.3 ft. Chlorophyll-a: 2.5 µg/L. Trophic State Index: 42.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 9.3 ft | C |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 2.5 µg/L | A |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Nine Mile Reservoir
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Fishing Nine Mile Reservoir
Location
County Ranking
Ranked #9 of 13 lakes in Sanpete County
Cleaner Lakes Within 30 Miles
Nine Mile Reservoir holds Grade B. 2 nearby lakes hold higher grades.
- AFerron ReservoirSanpete County · 14.2 mi · Higher grade (B → A)
- ANla LakeSanpete County · 14.1 mi · Higher grade (B → A)
Nearby Lakes in Sanpete County
Explore Nine Mile Reservoir 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: 2020-08-03
Monitoring stations: 1