Belly Deep Slough Lake
Cook County, IllinoisView mapDirections
No nutrient or algae sampling on record from Illinois EPA for this lake.
- Limited data
Belly Deep Slough Lake in Cook County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported.
Belly Deep Slough Lake is a lake in Cook County, Illinois.
Source: EPA Water Quality Portal sampling records, Illinois EPA, last sampled 2022-03-22. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Belly Deep Slough Lake is safe to swim in today is a call for the Illinois Environmental Protection Agency and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Belly Deep Slough Lake
These are the measurements Illinois EPA publishes for Belly Deep Slough Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data.
Ask about Belly Deep Slough Lake
Answers come straight from the public measurements and survey records on this page.
Stays via Stay22
Stays near Belly Deep Slough Lake
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Fishing Belly Deep Slough Lake
Regulated Pollution Sources Nearby
5 EPA-permitted facilities operate within about 5 miles of Belly Deep Slough Lake under Clean Water Act (NPDES) discharge permits. 3 facilities have a reported Clean Water Act violation in the past three years.
- Vcna Prairie LlcBridgeview · 3.3 mi away · NPDES IL0078590Recent violation
- Westlake Epoxy, IncBedford Park · 3.7 mi away · NPDES IL0075205Recent violation
- Ingredion Incorporated Argo PlantBedford Park · 4.6 mi away · NPDES IL0041009Recent violation
- Mccook ResevoirWillow Springs · 3 mi away · NPDES IL0079138
- Golden Grain Co-BridgeviewBridgeview · 4.1 mi away · NPDES IL0073342
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.
Nearby Lakes in Cook County
Frequently asked questions about Belly Deep Slough Lake
Where is Belly Deep Slough Lake?
- Belly Deep Slough Lake is a lake in Cook County, Illinois. Its water-quality measurements are published by Illinois EPA and shown on this page as reported.
What is the water quality of Belly Deep Slough Lake?
- Belly Deep Slough Lake in Cook County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported.
Is Belly Deep Slough Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Belly Deep Slough Lake across LakeQuality
Planning a trip around Indiana Dunes?
Belly Deep Slough Lake is about 39 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 lakes in Illinois
Other Lakes in Illinois
Where this data comes from
1 measurement from 1 monitoring station, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- USGS Illinois Water Science Center
USGS-IL1 sample · 2022
Analytical methods
- Secchi disk method
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Regulated discharger data from EPA ECHO (ICIS-NPDES)