Jackson Park Inner Harbor Lake is a productive, nutrient-rich eutrophic lake in Cook County, Illinois. Water quality is graded D based on 1 sampling years through 2023. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 67 other monitored lakes in Cook County, Jackson Park Inner Harbor Lake ranks #29 for water quality.
Source: EPA Water Quality Portal sampling records, Illinois DNR, last sampled 2023-05-04. Grade methodology: LakeGrade methodology.
Watch Jackson Park Inner Harbor Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Murky, only visible to about 5 ft. Trophic State Index: 54.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5 ft | D |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 54 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Jackson Park Inner Harbor Lake
Compare lakeside cabins, hotels, and vacation rentals near Jackson Park Inner Harbor 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 Jackson Park Inner Harbor 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 Jackson Park Inner Harbor Lake?
Get lake water-quality report cards plus the best cabin & lodging deals near Jackson Park Inner Harbor Lake — straight to your inbox. No spam, unsubscribe anytime.
Planning a whole trip? See where to stay at Illinois’s top lakes →
Fishing Jackson Park Inner Harbor Lake
Recreation & Access
Location
County Ranking
Ranked #29 of 68 lakes in Cook County
Nearby Lakes in Cook County
Explore Jackson Park Inner Harbor Lake across LakeGrade
More Illinois Lake Rankings
Other Grade D Lakes in Illinois
Eutrophic Lakes in Illinois
More records, surveys & data sources
EPA Impairment Status
Jackson Park Inner Harbor 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_QZM · Official waterbody report · Matched by proximity (0.16 km)
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: 2023-05-04
Monitoring stations: 1