Black Pit Lake
Cerro Gordo County, WisconsinEutrophic
Black Pit Lake is a productive, nutrient-rich eutrophic lake in Cerro Gordo County, IA. Water quality is graded D based on 2 sampling years through 2022. Compared to the 3 other monitored lakes in Cerro Gordo County, Black Pit Lake ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2022-09-12. Grade methodology: LakeGrade methodology.
Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Murky, only visible to about 5.6 ft. Chlorophyll-a: 40.9 µg/L. Trophic State Index: 60.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5.6 ft | D |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 40.9 µg/L | F |
| Trophic State Index (TSI) | 60 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Location
County Ranking
Ranked #3 of 4 lakes in Cerro Gordo County
Cleaner Lakes Within 30 Miles
Black Pit Lake holds Grade D. 2 nearby lakes hold higher grades.
- ABlue Pit LakeCerro Gordo County · 0.2 mi · Two grade letters higher (D → A)
- BRudd LakeFloyd County · 16.8 mi · Two grade letters higher (D → B)
Nearby Lakes in Cerro Gordo County
More Wisconsin Lake Rankings
Other Grade D Lakes in Wisconsin
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: 2022-09-12
Monitoring stations: 1