Greendale Lake
Greendale Lake in Clay County, Illinois is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 43 acres.
- Area
- 43 acres
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Why Greendale Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Greendale Lake, no water-quality sampling on record for this lake.
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. 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.
Greendale Lake is a 43-acre lake in Clay County, Illinois.
Source: EPA Water Quality Portal sampling records, Illinois EPA, last sampled recent years. Grade methodology: LakeQuality methodology.
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Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Greendale Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Trophic State Index: undefined.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) |
Where to stay near Greendale Lake
Compare lakeside cabins, hotels, and vacation rentals near Greendale Lake in Clay 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.
Top-rated places to stay near Greendale Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 43 acres |
No bathymetric survey has been published for Greendale Lake, so its depth is not documented here.
Fishing Greendale Lake
Nearby Lakes in Clay County
Frequently asked questions about Greendale Lake
Where is Greendale Lake?
- Greendale Lake is a lake in Clay County, Illinois. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Greendale Lake?
- Greendale Lake in Clay County, Illinois is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 43 acres.
Is Greendale Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Greendale Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore Greendale Lake across LakeQuality
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Where this data comes from
Measurements for Greendale Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.