Pierce Lake
Pierce Lake in Winnebago County, Illinois is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 151 acres.
- Area
- 151 acres
- Public access
- Yes
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Why Pierce 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 Pierce 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.
Pierce Lake is a 151-acre lake in Winnebago County, Illinois. Limited fish-species data available. Public access is available with 2 public boat landings.
Source: EPA Water Quality Portal sampling records, Illinois EPA, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Pierce Lake water quality
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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 Pierce 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 Pierce Lake
Compare lakeside cabins, hotels, and vacation rentals near Pierce Lake in Winnebago 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 Pierce Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 151 acres |
| Public Access | Yes |
No bathymetric survey has been published for Pierce Lake, so its depth is not documented here.
Recreation & Access
- Willow Creek - Rock Cut State Park - SouthPublic
- Willow Creek - Rock Cut State Park - NorthPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Pierce Lake
Nearby Lakes in Winnebago County
Frequently asked questions about Pierce Lake
Where is Pierce Lake?
- Pierce Lake is a lake in Winnebago 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 Pierce Lake?
- Pierce Lake in Winnebago County, Illinois is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 151 acres.
Is Pierce Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Pierce 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 Pierce Lake?
- Pierce Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Willow Creek - Rock Cut State Park - South, Willow Creek - Rock Cut State Park - North. Public access is listed as yes.
Explore Pierce Lake across LakeQuality
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Where this data comes from
Measurements for Pierce 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