Lake Upsilon
Rolette County, WisconsinMesotrophic
Lake Upsilon is a 110-acre mesotrophic lake in Rolette County, ND. Water quality is graded A based on 2 sampling years through 2025. Compared to the 13 other monitored lakes in Rolette County, Lake Upsilon ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2025-10-01. Grade methodology: LakeGrade methodology.
Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
Good clarity, visible to about 11.2 ft. Chlorophyll-a: 2.1 µg/L. Trophic State Index: 40.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 11.2 ft | B |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 2.1 µg/L | A |
| Trophic State Index (TSI) | 40 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 110 acres |
Location
County Ranking
Ranked #2 of 14 lakes in Rolette County
Nearby Lakes in Rolette County
More Wisconsin Lake Rankings
Other Grade A Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Lake Upsilon is a man-made reservoir impounded by the Wakopa Dam (completed 1966), built primarily for recreation on the Badger Creek; earth-type dam, 17 ft tall and 543 ft long.
- Surface area
- 110 ac
- Normal storage
- 330 ac-ft
- Max storage
- 560 ac-ft
- Drainage area
- 0 sq mi
- Hazard class
- Low
- Owner
- ND Game & Fish
All listed purposes: Recreation;Fish and Wildlife Pond.
Source: USACE National Inventory of Dams, NID ID ND00157 · Operator website
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-10-01
Monitoring stations: 1