Willow Creek Reservoir is a productive, nutrient-rich eutrophic lake in Yavapai County, Arizona. Water quality is graded F based on 1 sampling years through 2022. Compared to the 8 other monitored lakes in Yavapai County, Willow Creek Reservoir ranks #8 for water quality.
Source: EPA Water Quality Portal sampling records, Arizona DNR, last sampled 2022-04-12. 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
Murky, only visible to about 3.8 ft. Phosphorus level: 165 µg/L. Trophic State Index: 68.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.8 ft | D |
| Phosphorus | 165 µg/L | F |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 68 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Willow Creek Reservoir
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Fishing Willow Creek Reservoir
Location
County Ranking
Ranked #8 of 9 lakes in Yavapai County
Cleaner Lakes Within 30 Miles
Willow Creek Reservoir holds Grade F. 2 nearby lakes hold higher grades.
Nearby Lakes in Yavapai County
Explore Willow Creek Reservoir across LakeGrade
More Arizona Lake Rankings
Other Grade F Lakes in Arizona
Eutrophic 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: 2022-04-12
Monitoring stations: 1