Willard Bay Reservoir is a productive, nutrient-rich eutrophic lake in Box Elder County, Utah. Water quality is graded C based on 2 sampling years through 2023. Compared to the 22 other monitored lakes in Box Elder County, Willard Bay Reservoir ranks #9 for water quality.
Source: EPA Water Quality Portal sampling records, Utah DNR, last sampled 2023-10-10. Grade methodology: LakeGrade methodology.
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Very murky, less than 2.3 ft of visibility. Chlorophyll-a: 7.9 µg/L. Trophic State Index: 58.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.3 ft | F |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 7.9 µg/L | B |
| Trophic State Index (TSI) | 58 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Willard Bay Reservoir
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Fishing Willard Bay Reservoir
Location
County Ranking
Ranked #9 of 23 lakes in Box Elder County
Cleaner Lakes Within 30 Miles
Willard Bay Reservoir holds Grade C. One nearby lake has a higher grade.
See full comparison →Nearby Lakes in Box Elder County
Explore Willard Bay Reservoir across LakeGrade
More Utah Lake Rankings
Other Grade C Lakes in Utah
Eutrophic 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: 2023-10-10
Monitoring stations: 1