Boathouse Lake
St. Louis city County, WisconsinEutrophic
Boathouse Lake is a productive, nutrient-rich eutrophic lake in St. Louis city County, MO. Water quality is graded D based on 3 sampling years through 2024. Compared to the 4 other monitored lakes in St. Louis city County, Boathouse Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2024-09-11. Grade methodology: LakeGrade methodology.
Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Very murky, less than 2.3 ft of visibility. Phosphorus level: 59.8 µg/L. Chlorophyll-a: 18 µg/L. Trophic State Index: 62.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.3 ft | F |
| Phosphorus | 59.8 µg/L | C |
| Chlorophyll-a (Algae) | 18 µg/L | C |
| Trophic State Index (TSI) | 62 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Location
County Ranking
Ranked #1 of 5 lakes in St. Louis city County
Nearby Lakes in St. Louis city County
More Wisconsin Lake Rankings
Other Grade D Lakes in Wisconsin
Shelby County · Clarity: 3.2 ft
Macon County · Clarity: 1.8 ft
Harrison County · Clarity: 1.7 ft
Stone County · Clarity: 2.3 ft
Knox County · Clarity: 2.1 ft
Camden County · Clarity: 2.7 ft
Eutrophic Lakes in Wisconsin
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-09-11
Monitoring stations: 1