Crab Orchard Lake
Crab Orchard Lake in Williamson County, Illinois is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 7293 acres.
- Area
- 7,293 acres
- Public access
- Yes
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Why Crab Orchard 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 Crab Orchard 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.
Crab Orchard Lake is a 7,293-acre lake in Williamson County, Illinois. Limited fish-species data available. Public access is available with 8 public boat landings.
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 Crab Orchard 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 Crab Orchard Lake
Compare lakeside cabins, hotels, and vacation rentals near Crab Orchard Lake in Williamson 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 Crab Orchard Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 7,293 acres |
| Public Access | Yes |
No bathymetric survey has been published for Crab Orchard Lake, so its depth is not documented here.
Recreation & Access
- Crab Orchard LakePublic
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Showing 6 of 8 documented landings from the USGS National Boat Ramps inventory.
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Crab Orchard Lake
Nearby Lakes in Williamson County
Frequently asked questions about Crab Orchard Lake
Where is Crab Orchard Lake?
- Crab Orchard Lake is a lake in Williamson 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 Crab Orchard Lake?
- Crab Orchard Lake in Williamson County, Illinois is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 7293 acres.
Is Crab Orchard Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Crab Orchard Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Are there boat ramps on Crab Orchard Lake?
- Crab Orchard Lake has 8 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Crab Orchard Lake, Crab Orchard Lake, Crab Orchard Lake, Crab Orchard Lake, among others. Public access is listed as yes.
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Where this data comes from
Measurements for Crab Orchard Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Named boat-access points from the USGS National Boat Ramps inventory