Great Lakes Quarries East
Cook County, IllinoisView mapDirections
Illinois EPA publishes the water-quality measurements for Great Lakes Quarries East. Here is what has been measured.
- Limited data
Great Lakes Quarries East in Cook County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Water clarity: 4.5 ft visibility.
Great Lakes Quarries East is a lake in Cook County, Illinois.
Source: EPA Water Quality Portal sampling records, Illinois EPA, last sampled 2022-09-09. 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 Great Lakes Quarries East 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 Great Lakes Quarries East
These are the measurements Illinois EPA publishes for Great Lakes Quarries East, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 4.5 ft. TSI 55.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 4.5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 55 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
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Fishing Great Lakes Quarries East
Regulated Pollution Sources Nearby
2 EPA-permitted facilities operate within about 5 miles of Great Lakes Quarries East under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger. 1 facility has a reported Clean Water Act violation in the past three years.
- Argonne National LaboratoryArgonne · 1.6 mi away · NPDES IL0034592MajorRecent violation
- Nicor GasLemont · 1 mi away · NPDES IL0079928
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 Great Lakes Quarries East
Where is Great Lakes Quarries East?
- Great Lakes Quarries East 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 Great Lakes Quarries East?
- Great Lakes Quarries East in Cook County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Water clarity: 4.5 ft visibility.
Is Great Lakes Quarries East safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Great Lakes Quarries East across LakeQuality
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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)