Washington Park Lagoon Lake
Cook County, IllinoisView mapDirections
Not enough samples to grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). No letter yet. Here is what we do have.
- Impaired · Algal growth
- Public access
- Limited data
Washington Park Lagoon Lake in Cook County, Illinois is not rated for water quality — its monitoring record does not meet the evidence bar.
- Public access
- Yes
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Watch Washington Park Lagoon Lake’s letter
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Why Washington Park Lagoon Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Washington Park Lagoon Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by Illinois EPA and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Washington Park Lagoon Lake is a lake in Cook County, Illinois. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Illinois EPA, last sampled 2023-05-08. Grade methodology: LakeQuality methodology.
What Washington Park Lagoon Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Washington Park Lagoon Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, nutrients (phosphorus, nitrogen), turbidity. Check local advisories before you swim.
Water quality measurements for Washington Park Lagoon Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples |
Recreation & Access
- Washingtion Park Lagoon Boat DockPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Washington Park Lagoon Lake
EPA Impairment Status
Washington 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_QZF · Official waterbody report · Matched by proximity (0.04 km)
Nearby Lakes in Cook County
Frequently asked questions about Washington Park Lagoon Lake
Where is Washington Park Lagoon Lake?
- Washington Park Lagoon Lake is a lake in Cook County, Illinois. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Washington Park Lagoon Lake?
- Washington Park Lagoon Lake in Cook County, Illinois is not rated for water quality — its monitoring record does not meet the evidence bar.
Is Washington Park Lagoon Lake safe to swim in?
- The letter is not a swimming clearance. Washington Park Lagoon Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, nutrients (phosphorus, nitrogen), turbidity. Check local advisories before you swim.
Are there boat ramps on Washington Park Lagoon Lake?
- Washington Park Lagoon Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Washingtion Park Lagoon Boat Dock. Public access is listed as yes.
Explore Washington Park Lagoon Lake across LakeQuality
Planning a trip around Indiana Dunes?
Washington Park Lagoon Lake is about 29 miles from Indiana Dunes National Park. Crowds there swing hard by season, so the month you pick changes both how busy the park is and what lodging costs.
Best time to visit Indiana Dunes →More Illinois Lake Rankings
Other Lakes in Illinois
Where this data comes from
1 measurement from 1 monitoring station, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- USGS Illinois Water Science Center
USGS-IL1 sample · 2023
Analytical methods
- Secchi disk method
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Named boat-access points from the USGS National Boat Ramps inventory