Quail Creek Reservoir is a cold, clear oligotrophic lake in Washington County, Utah. Water quality is graded A based on 2 sampling years through 2025. Compared to the 14 other monitored lakes in Washington County, Quail Creek Reservoir ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, Utah DNR, last sampled 2025-08-20. Grade methodology: LakeGrade methodology.
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Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
Good clarity, visible to about 14.6 ft. Chlorophyll-a: 0.9 µg/L. Trophic State Index: 34.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 14.6 ft | B |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 0.9 µg/L | A |
| Trophic State Index (TSI) | 34 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Quail Creek Reservoir
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Fishing Quail Creek Reservoir
Location
County Ranking
Ranked #4 of 15 lakes in Washington County
Nearby Lakes in Washington County
Explore Quail Creek Reservoir across LakeGrade
More Utah Lake Rankings
Other Grade A Lakes in Utah
Oligotrophic 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: 2025-08-20
Monitoring stations: 2