Lake Buteau
Lincoln County, WisconsinOligotrophic
Lake Buteau earns an A — water clarity, phosphorus, and chlorophyll-a all rate among the best monitored waters in Lincoln County. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.
Trophically, Lake Buteau reads as oligotrophic — nutrient-poor, clear, and ecologically more sensitive to disturbance than richer lakes. At 50 ft of maximum depth, Lake Buteau stratifies reliably through the summer — the hypolimnion stays cooler and clearer than the surface layer suggests. The lake is compact at 51 acres, with partial shoreline records and little volume to buffer nutrient inputs. Lake Buteau sits at rank 13 of 21 in Lincoln County, in the lower half of the local distribution.
No invasive species are currently listed at Lake Buteau — the lake remains off the Wisconsin infested-waters roster. The fishery is bass-led, with 3 documented species across the lake's records. Monitoring depth is thin here: the LakeGrade rubric is applied to a small number of sample years, and the grade will be revised as more data accumulates.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2025-08-29. Grade methodology: LakeGrade methodology.
Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
Crystal clear, you can see 63.7 ft down. Phosphorus level: 10.2 µg/L. Trophic State Index: 27.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 63.7 ft | A |
| Phosphorus | 10.2 µg/L | A |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 27 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 50 ft |
| Surface Area | 51 acres |
Fish Species
Click a species to see all Wisconsin and Minnesota lakes where it is found.
→ Best fishing times for Lake Buteau (14-day solunar calendar)
→ Is it safe to eat fish from Lake Buteau? (mercury & PFAS guide)
→ Lake Buteau fishing regulations (limits, seasons, special rules)
Water Quality Trend: ↑ Improving
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.257 m/yr | 7 |
| Phosphorus | ↑ Improving | -0.86 µg/L/yr | 6 |
Location
County Ranking
Ranked #13 of 21 lakes in Lincoln County
Nearby Lakes in Lincoln County
More Wisconsin Lake Rankings
State Parks Near Lake Buteau
Other Grade A Lakes in Wisconsin
Waukesha County · Clarity: 14.6 ft
Waukesha County · Clarity: 13.8 ft
Walworth County · Clarity: 19 ft
Washington County · Clarity: 12 ft
Kenosha County · Clarity: 10.1 ft
Washington County · Clarity: 12.5 ft
Oligotrophic Lakes in Wisconsin
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 1999. 2 stations on file (most recent sample 2025).
Fish Species (DNR-rated)
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Fish and recreation data from Wisconsin DNR Lakes
Most recent sample: 2025-08-29
Monitoring stations: 2