Great Lakes Quarries West
Cook County, IllinoisView mapDirections
Not Rated: one monitoring station are on record, but they measured water clarity only. LakeQuality’s A–F method grades total phosphorus, total nitrogen, chlorophyll-a, and turbidity; clarity is shown, not scored.
- Public access
- Limited data
Great Lakes Quarries West in Cook County, Illinois is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 2.5 ft visibility.
- Clarity
- 2.5 ft
- Public access
- Yes
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Watch Great Lakes Quarries West’s letter
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Why Great Lakes Quarries West has no grade
Great Lakes Quarries West has monitoring on record from one station, but only water clarity was measured. LakeQuality’s A–F letter uses total phosphorus, total nitrogen, chlorophyll-a, and turbidity against EPA National Lakes Assessment condition classes. With none of those grading measurements on record, Great Lakes Quarries West is Not Rated — not an F. Its 2.5-foot median from 1 readings collected 2022 is still shown as clarity, but clarity alone cannot earn a letter.
Not Rated is EPA Integrated Reporting Category 3 — insufficient information. 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.
Great Lakes Quarries West 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 2022-09-06. Grade methodology: LakeQuality methodology.
What Great Lakes Quarries West 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. Check local advisories before you swim.
Water quality measurements for Great Lakes Quarries West
These readings exist but are not enough for an A–F grade — see why.
Very murky, less than 2.5 ft of visibility. TSI 64.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.5 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 64 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Recreation & Access
- Great Lakes QuarryPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Great Lakes Quarries West
Graded lakes near Great Lakes Quarries West
Great Lakes Quarries West has no grade, but these lakes within a short drive do.
Nearby Lakes in Cook County
Frequently asked questions about Great Lakes Quarries West
Where is Great Lakes Quarries West?
- Great Lakes Quarries West 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 Great Lakes Quarries West?
- Great Lakes Quarries West in Cook County, Illinois is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 2.5 ft visibility.
Is Great Lakes Quarries West safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Are there boat ramps on Great Lakes Quarries West?
- Great Lakes Quarries West has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Great Lakes Quarry. Public access is listed as yes.
Explore Great Lakes Quarries West across LakeQuality
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Other Lakes in Illinois
Eutrophic 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)
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
Named boat-access points from the USGS National Boat Ramps inventory