Skokie Lagoons Lake is a highly nutrient-loaded hypereutrophic lake in Cook County, Illinois. Water quality is graded F based on 2 sampling years through 2021. Limited fish-species data available. Public access is available with 1 public boat landing. 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, Illinois DNR, last sampled 2021-09-27. Grade methodology: LakeGrade methodology.
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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
Where to stay near Skokie Lagoons Lake
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Fishing Skokie Lagoons Lake
Recreation & Access
Water Temperature
Skokie Lagoons Lake averages about 78°F at the surface in summer, usually warmest in Jul (about 81°F) and coldest in May (about 55°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 62 field readings (2011–2023) via the EPA Water Quality Portal. See the full Skokie Lagoons Lake water temperature breakdown →
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
Explore Skokie Lagoons Lake across LakeGrade
Species activity outlook by water temperature and season
Where to stay at Illinois's top lakes, each with its grade
Very high nutrients, dense algae, poor clarity
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More records, surveys & data sources
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
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Public boat-access points from the USGS National Boat Ramps inventory
Most recent sample: 2021-09-27
Monitoring stations: 3