Illinois Central Reservoir
Illinois Central Reservoir in Jefferson County, Illinois is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 91 acres.
- Area
- 91 acres
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Why Illinois Central Reservoir 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 Illinois Central Reservoir, 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.
Illinois Central Reservoir is a 91-acre lake in Jefferson 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 Illinois Central Reservoir
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 Illinois Central Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Illinois Central Reservoir in Jefferson 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 Illinois Central Reservoir
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 91 acres |
No bathymetric survey has been published for Illinois Central Reservoir, so its depth is not documented here.
Fishing Illinois Central Reservoir
Nearby Lakes in Jefferson County
Frequently asked questions about Illinois Central Reservoir
Where is Illinois Central Reservoir?
- Illinois Central Reservoir is a lake in Jefferson 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 Illinois Central Reservoir?
- Illinois Central Reservoir in Jefferson County, Illinois is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 91 acres.
Is Illinois Central Reservoir safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Illinois Central Reservoir is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore Illinois Central Reservoir across LakeQuality
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Where this data comes from
Measurements for Illinois Central Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.