Windy Gap Reservoir is a productive, nutrient-rich eutrophic lake in Grand County, Colorado. Water quality is graded B based on 2 sampling years through 2023. Compared to the 5 other monitored lakes in Grand County, Windy Gap Reservoir ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, Colorado DNR, last sampled 2023-07-10. Grade methodology: LakeGrade methodology.
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
No clarity data. Phosphorus level: 52.5 µg/L. Chlorophyll-a: 3 µg/L. Trophic State Index: 51.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 52.5 µg/L | C |
| Chlorophyll-a (Algae) | 3 µg/L | A |
| Trophic State Index (TSI) | 51 | Eutrophic |
High nutrients, frequent algae, reduced clarity
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Fishing Windy Gap Reservoir
Location
County Ranking
Ranked #4 of 6 lakes in Grand County
Cleaner Lakes Within 30 Miles
Windy Gap Reservoir holds Grade B. 3 nearby lakes hold higher grades.
- ALake GranbyGrand County · 7.7 mi · Higher grade (B → A)
- BGrand LakeGrand County · 13 mi · Higher overall water quality score
- BWolford Mountain ReservoirGrand County · 22.9 mi · Higher overall water quality score
Nearby Lakes in Grand County
Explore Windy Gap Reservoir across LakeGrade
More Colorado Lake Rankings
Other Grade B Lakes in Colorado
Eutrophic Lakes in Colorado
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: 2023-07-10
Monitoring stations: 1