Douglass Park Lagoon Lake is a highly nutrient-loaded hypereutrophic lake in Cook County, Illinois. Water quality is graded F based on 1 sampling years through 2023. Compared to the 67 other monitored lakes in Cook County, Douglass Park Lagoon Lake ranks #60 for water quality.
Source: EPA Water Quality Portal sampling records, Illinois DNR, last sampled 2023-05-16. Grade methodology: LakeGrade methodology.
Watch Douglass Park Lagoon Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
Very murky, less than 1.5 ft of visibility. Trophic State Index: 71.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.5 ft | F |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 71 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Douglass Park Lagoon Lake
Compare lakeside cabins, hotels, and vacation rentals near Douglass Park Lagoon Lake in Cook County, Illinois — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Douglass Park Lagoon Lake
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip to Douglass Park Lagoon Lake?
Get lake water-quality report cards plus the best cabin & lodging deals near Douglass Park Lagoon Lake — straight to your inbox. No spam, unsubscribe anytime.
Planning a whole trip? See where to stay at Illinois’s top lakes →
Fishing Douglass Park Lagoon Lake
Location
County Ranking
Ranked #60 of 68 lakes in Cook County
Nearby Lakes in Cook County
Explore Douglass Park Lagoon 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
Illinois's cleanest and most-polluted lakes, ranked
More Illinois Lake Rankings
Other Grade F Lakes in Illinois
Hypereutrophic Lakes in Illinois
More records, surveys & data sources
EPA Impairment Status
Douglass Park Lagoon Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit IL_RHX · Official waterbody report · Matched by proximity (0.09 km)
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Douglass Park Lagoon Lake under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Midwest Salt LlcChicago · 2.4 mi away · NPDES IL0080298Recent violation
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2023-05-16
Monitoring stations: 1