Skokie Lagoons Lake
Cook County, WisconsinHypereutrophic
Skokie Lagoons Lake is a highly nutrient-loaded hypereutrophic lake in Cook County, IL. Water quality is graded F based on 2 sampling years through 2021. Compared to the 67 other monitored lakes in Cook County, Skokie Lagoons Lake ranks #68 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2021-09-27. Grade methodology: LakeGrade methodology.
Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
Very murky, less than 1.6 ft of visibility. Phosphorus level: 155 µg/L. Trophic State Index: 74.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.6 ft | F |
| Phosphorus | 155 µg/L | F |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 74 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Location
County Ranking
Ranked #68 of 68 lakes in Cook County
Cleaner Lakes Within 30 Miles
Skokie Lagoons Lake holds Grade F. One nearby lake has a higher grade.
See full comparison →Nearby Lakes in Cook County
More Wisconsin Lake Rankings
Other Grade F Lakes in Wisconsin
Hypereutrophic Lakes in Wisconsin
EPA Impairment Status
Skokie Lagoons Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit IL_RHJ · Official waterbody report
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Grading methodology based on Metropolitan Council standards
Most recent sample: 2021-09-27
Monitoring stations: 3