Sag Quarry West Lake
Cook County, IllinoisView mapDirections
Illinois EPA publishes the water-quality measurements for Sag Quarry West Lake. Here is what has been measured.
- Eutrophic
- Limited data
Sag Quarry West Lake in Cook County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Water clarity: 4.2 ft visibility. Phosphorus: 65.5 µg/L. Chlorophyll-a (algae): 22.1 µg/L.
Sag Quarry West Lake is a productive, nutrient-rich eutrophic lake in Cook County, Illinois. Compared to the 15 other monitored lakes in Cook County, Sag Quarry West Lake ranks #9 for water quality.
Source: EPA Water Quality Portal sampling records, Illinois EPA, last sampled 2021-10-26. Methodology: how these readings are compared.
Swimming conditions
Readings onlyLimited data
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
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.
Murky, only visible to about 4.2 ft. Phosphorus 65.5 µg/L. Chlorophyll-a 22.1 µg/L. TSI 61.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 4.2ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 65.5µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | 22.1µg/L | Poor GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 61 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Sag Quarry West Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Sag Quarry West Lake typically sits around 54°F at the surface in October. Summer average is about 77°F. Usually warmest in Jun (about 77°F) and coldest in Oct (about 54°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (54°F) to its warmest (77°F).
Typical surface water temperature by month, from 24 field readings (2021–2021) via the EPA Water Quality Portal. See the full Sag Quarry West Lake water temperature breakdown →
Stays via Stay22
Stays near Sag Quarry West Lake
Compare lakeside cabins, hotels, and vacation rentals near Sag Quarry West Lake in Cook County, Illinois — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Sag Quarry West Lake are listed below.
Top-rated places to stay near Sag Quarry West Lake
Prices for Oct 23–25, 4 adults. Change dates on the map below.
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Fishing Sag Quarry West Lake
Regulated Pollution Sources Nearby
3 EPA-permitted facilities operate within about 5 miles of Sag Quarry West Lake under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Imtt Illinois - Lemont FacilityLemont · 0.9 mi away · NPDES IL0005126Recent violation
- Meno Stone Co IncLemont · 0.1 mi away · NPDES IL0065137
- Holy Family Villa StpLemont · 1.8 mi away · NPDES IL0024678
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. Water clarity: 4.2 ft visibility. Phosphorus: 65.5 µg/L. Chlorophyll-a (algae): 22.1 µg/L.
Is Sag Quarry West Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Sag Quarry West Lake?
- Sag Quarry West Lake typically sits around 54°F at the surface in October, from 24 EPA Water Quality Portal field readings (2021–2021). That is a typical value for the month, not a live reading.
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Where this data comes from
19 measurements from 1 monitoring station, 2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- illinois epa
IL_EPA_WQX19 samples · 2021
Analytical methods
- MEASURED IN FIELD
- Phosphorus by Colorimetry
- 10200 H 2 ~ Chlorophyll a-b-c Determination by spectrophotometer
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)