Silverbell Lake is a highly nutrient-loaded hypereutrophic lake in Pima County, Arizona. Water quality is graded F based on 1 sampling years through 2026. Compared to the 3 other monitored lakes in Pima County, Silverbell Lake ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, Arizona DNR, last sampled 2026-04-02. Grade methodology: LakeGrade methodology.
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Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
Very murky, less than 0.8 ft of visibility. Phosphorus level: 100 µg/L. Trophic State Index: 75.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.8 ft | F |
| Phosphorus | 100 µg/L | F |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 75 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
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Fishing Silverbell Lake
Location
County Ranking
Ranked #4 of 4 lakes in Pima County
Nearby Lakes in Pima County
Explore Silverbell Lake across LakeGrade
More Arizona Lake Rankings
Other Grade F Lakes in Arizona
Hypereutrophic Lakes in Arizona
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: 2026-04-02
Monitoring stations: 1