Poss Lake
DuPage County, WisconsinEutrophic
Poss Lake is a productive, nutrient-rich eutrophic lake in DuPage County, IL. Water quality is graded D based on 2 sampling years through 2021.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2021-09-22. 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 1.2 ft of visibility. Phosphorus level: 32 µg/L. Trophic State Index: 65.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.2 ft | F |
| Phosphorus | 32 µg/L | C |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 65 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Location
County Ranking
Ranked #1 of 1 lakes in DuPage County
Cleaner Lakes Within 30 Miles
Poss Lake holds Grade D. One nearby lake has a higher grade.
See full comparison →Nearby Lakes in DuPage 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: 2021-09-22
Monitoring stations: 1