Tilleda Pond
Shawano County, WisconsinLimited DataEutrophic
On the scoring rubric Tilleda Pond grades a D: clarity readings still being added and 64 µg/L of phosphorus keep it in the lower bracket for Shawano County.
A TSI in the eutrophic range signals a lake doing what nutrient-loaded waters do — supporting an active algal community at the cost of clear water. At only 11 ft deep, Tilleda Pond is shallow — wind keeps the water column mixed and sediment resuspension drives phosphorus levels harder to manage. At 28 acres, Tilleda Pond sits below the Wisconsin median: a small water where shoreline activity has an outsized effect on water quality. Within the 27 graded lakes of Shawano County, Tilleda Pond sits at rank 24, near the bottom of the county list.
Eurasian watermilfoil is established at Tilleda Pond, which can dampen recreational access and pressure the native plant community. Bass fishing is part of the appeal: the species list runs to 3, anchored by largemouth and/or smallmouth bass. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2021-08-30. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
No clarity data. Phosphorus level: 64.4 µg/L. Trophic State Index: 64.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 64.4 µg/L | D |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 64 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 11 ft |
| Surface Area | 28 acres |
Fish Species
Click a species to see all Wisconsin and Minnesota lakes where it is found.
→ Best fishing times for Tilleda Pond (14-day solunar calendar)
→ Is it safe to eat fish from Tilleda Pond? (mercury & PFAS guide)
→ Tilleda Pond fishing regulations (limits, seasons, special rules)
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
Location
County Ranking
Ranked #24 of 27 lakes in Shawano County
Cleaner Lakes Within 30 Miles
Tilleda Pond holds Grade D. 5 nearby lakes hold higher grades.
- AMission LakeShawano County · mi · Two grade letters higher (D → A)
- ASams LakeShawano County · mi · Two grade letters higher (D → A)
- AMalone LakeShawano County · mi · Two grade letters higher (D → A)
- BUnknown LakeShawano County · mi · Two grade letters higher (D → B)
- CUpper Red LakeShawano County · mi · Higher grade (D → C)
Nearby Lakes in Shawano County
More Wisconsin Lake Rankings
Other Grade D Lakes in Wisconsin
Eutrophic Lakes in Wisconsin
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. 3 stations on file (most recent sample 2023).
Fish Species (DNR-rated)
Reservoir Info (USACE NID)
Tilleda Pond is a man-made reservoir impounded by the Tilleda (completed 1910), built primarily for recreation on the NORTH BRANCH EMBARRASS; gravity-type dam, 17 ft tall and 82 ft long.
- Surface area
- 28 ac
- Normal storage
- 133 ac-ft
- Max storage
- 160 ac-ft
- Drainage area
- 70.5 sq mi
- Hazard class
- High
- Owner
- TILLEDA POND REHABILITATION DISTRICT
Source: USACE National Inventory of Dams, NID ID WI00203 · Operator website
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2021-08-30
Monitoring stations: 1