Green Belt Lake
Black Hawk County, WisconsinEutrophic
Green Belt Lake is a productive, nutrient-rich eutrophic lake in Black Hawk County, IA. Water quality is graded D based on 2 sampling years through 2024. Compared to the 6 other monitored lakes in Black Hawk County, Green Belt Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2024-10-28. 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 2.4 ft of visibility. Chlorophyll-a: 21.2 µg/L. Trophic State Index: 63.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.4 ft | F |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 21.2 µg/L | D |
| Trophic State Index (TSI) | 63 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Location
County Ranking
Ranked #2 of 7 lakes in Black Hawk County
Cleaner Lakes Within 30 Miles
Green Belt Lake holds Grade D. One nearby lake has a higher grade.
See full comparison →Nearby Lakes in Black Hawk 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: 2024-10-28
Monitoring stations: 1