Cosgrove Lake
Cosgrove Lake in Florence County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 76 acres.
- Area
- 76 acres
Next lake in Florence County
Swipe left or right on this bar to open the next or previous lake.
Why Cosgrove 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 Cosgrove 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 WI DNR and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Cosgrove Lake is a 76-acre lake in Florence County, Wisconsin.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Cosgrove Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Cosgrove 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 Cosgrove Lake
Compare lakeside cabins, hotels, and vacation rentals near Cosgrove Lake in Florence County, Wisconsin — 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 Cosgrove Lake
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Wisconsin’s top lakes →
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 76 acres |
No bathymetric survey has been published for Cosgrove Lake, so its depth is not documented here.
Fishing Cosgrove Lake
Nearby Lakes in Florence County
Frequently asked questions about Cosgrove Lake
Where is Cosgrove Lake?
- Cosgrove Lake is a lake in Florence County, Wisconsin. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Cosgrove Lake?
- Cosgrove Lake in Florence County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 76 acres.
Is Cosgrove Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Cosgrove 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 Cosgrove Lake across LakeQuality
Fish species and top-graded lakes across Wisconsin
Fish species and best lakes in Florence County
Species activity outlook by water temperature and season
Where to stay at Wisconsin's top lakes, each with its grade
Wisconsin's cleanest and most-polluted lakes, ranked
More Wisconsin Lake Rankings
Other Lakes in Wisconsin
Where this data comes from
Measurements for Cosgrove Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.