Crawford County Lake Quality
Wisconsin, 1 lake — no lake here has enough monitoring data for a grade
Crawford County has 1 graded 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.
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. Unnamed Lake (—) is the cleanest in the county.
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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
1 lake · 0 graded, 1 not rated0 graded lakes · 1 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| NRUnnamed LakeCrawford | NR | 1.2 ft | 128 µg/L | No recent samples | No recent samples | ✓ Public |
NR = not rated: the monitoring record does not meet the evidence bar for a grade. That is EPA Integrated Reporting Category 3 (insufficient information), not a failing grade. How grading works.
Lake Match
Which lake suits how you actually use one?
Six questions — swimming, fishing, quiet, cabins, drive time — and a shortlist of graded lakes that fit, with the water quality behind each one.
Other Counties in Wisconsin
See how Crawford County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 39 states and 2 Canadian provinces.
Source: EPA National Aquatic Resource Surveys, 2026.