Sag Quarry-West Lake
Cook County, IllinoisView mapDirections
No nutrient or algae sampling on record from Illinois EPA for this lake.
- Limited data
Sag Quarry-West Lake in Cook County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported.
Sag Quarry-West Lake is a lake in Cook County, Illinois.
Source: EPA Water Quality Portal sampling records, Illinois EPA, last sampled 2022-04-27. 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 Sag Quarry-West 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 Sag Quarry-West Lake
These are the measurements Illinois EPA publishes for Sag Quarry-West 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 Sag Quarry-West Lake
Answers come straight from the public measurements and survey records on this page.
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Stays near Sag Quarry-West Lake
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Fishing Sag Quarry-West Lake
Regulated Pollution Sources Nearby
4 EPA-permitted facilities operate within about 5 miles of Sag Quarry-West Lake under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger. 2 facilities have a reported Clean Water Act violation in the past three years.
- Dupage County Public Works Knollwood StpBurr Ridge · 1.4 mi away · NPDES IL0065188MajorRecent violation
- Imtt Illinois LlcLemont · 0.9 mi away · NPDES IL0061182Recent violation
- Full Circle TerminalLemont · 0.7 mi away · NPDES IL0080127
- Arkema Lemont FacilityLemont · 0.9 mi away · NPDES IL0002399
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 Sag Quarry-West Lake
Where is Sag Quarry-West Lake?
- Sag Quarry-West 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 Sag Quarry-West Lake?
- Sag Quarry-West Lake in Cook County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported.
Is Sag Quarry-West Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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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)