Boujan Swale Lake
Cass County, WisconsinLimited DataHypereutrophic
Boujan Swale Lake is a highly nutrient-loaded hypereutrophic lake in Cass County, IL. Water quality is graded F based on 1 sampling years through 2023.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2023-07-18. Grade methodology: LakeGrade methodology.
Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
No clarity data. Chlorophyll-a: 136 µg/L. Trophic State Index: 79.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 136 µg/L | F |
| Trophic State Index (TSI) | 79 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Location
County Ranking
Ranked #1 of 1 lakes in Cass County
Cleaner Lakes Within 30 Miles
Boujan Swale Lake holds Grade F. One nearby lake has a higher grade.
See full comparison →Nearby Lakes in Cass County
More Wisconsin Lake Rankings
Other Grade F Lakes in Wisconsin
Hypereutrophic Lakes in Wisconsin
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2023-07-18
Monitoring stations: 1