Little Swan Lake
Little Swan Lake in Warren County, Illinois is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 228 acres.
- Area
- 228 acres
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Why Little Swan 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 Little Swan 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.
Little Swan Lake is a 228-acre lake in Warren 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 Little Swan 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 Little Swan Lake
Compare lakeside cabins, hotels, and vacation rentals near Little Swan Lake in Warren 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 Little Swan Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 228 acres |
No bathymetric survey has been published for Little Swan Lake, so its depth is not documented here.
Fishing Little Swan Lake
Nearby Lakes in Warren County
Frequently asked questions about Little Swan Lake
Where is Little Swan Lake?
- Little Swan Lake is a lake in Warren 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 Little Swan Lake?
- Little Swan Lake in Warren County, Illinois is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 228 acres.
Is Little Swan Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Little Swan 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 Little Swan Lake across LakeQuality
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Where this data comes from
Measurements for Little Swan Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.