Crawford County Lake Quality
Wisconsin, 7 lakes, measured by Wisconsin DNR
Crawford County has 7 monitored lakes — a thin enough sample that one or two stressed lakes can move the county average noticeably. Use the per-lake pages below for what actually matters. The 7 monitored lakes in Crawford County carry whatever clarity, phosphorus, and chlorophyll-a readings Wisconsin DNR has published, shown as reported.
Most of the county's monitored lakes are shallow, under 50 feet, which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed.
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Quick Answers for Crawford County
Planning a trip? Check special fishing regulations for Unnamed Lake — or browse the full Wisconsin regulations index.
DNR Reports (5)
Wisconsin DNR Fisheries Survey resources for lakes in Crawford County. browse all reports →
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- 2025Mississippi River Pools 9 and 10 fall survey, 2025Fisheries Survey · WI DNR · 2025 (PDF)
- 2024Mississippi River Pool 10 McGregor Lake HREP survey, 2024Fisheries Survey · WI DNR · 2024 (PDF)
- 2024Mississippi River Pools 9 and 10 tailwater survey, 2024Fisheries Survey · WI DNR · 2024 (PDF)
- 2017Mississippi River Pool 9 Lansing game fish survey, 2017Fisheries Survey · WI DNR · 2017 (PDF)
- 2015An Evaluation of Fishery Trends at the Ambrough Slough Habitat Project, 2015Fisheries Survey · WI DNR · 2015 (PDF)
All Lakes in Crawford County
7 lakes · 0 ranked on readings, 7 without enough sampling0 lakes ranked on readings · 7 without enough sampling, hidden
| # | Lake | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|
| Unnamed LakeCrawford | 1.2 ft | 128 µg/L | No recent samples | No recent samples | ✓ Public | |
| McGregor LakeCrawford | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Garnet LakeCrawford | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Sunfish LakeCrawford | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Upper MaraisCrawford | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Marais LakeCrawford | No recent samples | No recent samples | No recent samples | No recent samples | ✓ Public | |
| Lake WinneshiekCrawford | No recent samples | No recent samples | No recent samples | No recent samples | ✓ Public |
NR = no nutrient or algae reading on record. The measurements are published as the authority reports them. Where the data comes from.
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Source: the Wisconsin Department of Natural Resources. See data sources.