Lake Wauwanoka Nr. Dam
Jefferson County, WisconsinOligotrophic
Lake Wauwanoka Nr. Dam is a 86-acre cold, clear oligotrophic lake in Jefferson County, MO. Water quality is graded A based on 3 sampling years through 2024. Compared to the 6 other monitored lakes in Jefferson County, Lake Wauwanoka Nr. Dam ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2024-09-18. 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 12.9 ft. Phosphorus level: 8 µg/L. Chlorophyll-a: 1.7 µg/L. Trophic State Index: 37.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 12.9 ft | B |
| Phosphorus | 8 µg/L | A |
| Chlorophyll-a (Algae) | 1.7 µg/L | A |
| Trophic State Index (TSI) | 37 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 86 acres |
Location
County Ranking
Ranked #1 of 7 lakes in Jefferson County
Nearby Lakes in Jefferson County
More Wisconsin Lake Rankings
Other Grade A Lakes in Wisconsin
St. Francois County · Clarity: 14.1 ft
Washington County · Clarity: 11.1 ft
St. Francois County · Clarity: 14.3 ft
Warren County · Clarity: 12.6 ft
St. Francois County · Clarity: 16.3 ft
Taney County · Clarity: 13.3 ft
Oligotrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Lake Wauwanoka Nr. Dam is a man-made reservoir impounded by the Lake Wauwanoka Dam (completed 1942), built primarily for recreation on the DRY CREEK; earth-type dam, 60 ft tall and 1,045 ft long.
- Surface area
- 86 ac
- Normal storage
- 2,370 ac-ft
- Max storage
- 2,800 ac-ft
- Drainage area
- 2.06 sq mi
- Hazard class
- High
- Owner
- LAKE WAUWANOKA, INC
Source: USACE National Inventory of Dams, NID ID MO30080 · Operator website · Matched by proximity (0.08 km)
EPA Impairment Status
Lake Wauwanoka Nr. Dam is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit MO_7258.00 · Official waterbody report · Matched by proximity (0.66 km)
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-09-18
Monitoring stations: 1