Vernon County Lake Quality
Wisconsin, 1 lake — no lake here has enough monitoring data for a grade
Vernon 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.
The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is Sidie Hollow Lake (—); the most-stressed is Sidie Hollow Lake (—).
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Quick Answers for Vernon County
Planning a trip? Check special fishing regulations for Sidie Hollow Lake, whether the fish are safe to eat, and the best times to fish — or browse the full Wisconsin regulations index.
DNR Reports (2)
Wisconsin DNR Fisheries Survey resources for lakes in Vernon County. browse all reports →
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- 2025Lower Reno Bottoms Mississippi River fall survey, 2025Fisheries Survey · WI DNR · 2025 (PDF)
- 2024Sidie Hollow Lake fishery survey, 2024Fisheries Survey · WI DNR · 2024 (PDF)
All Lakes in Vernon County
1 lake · 0 graded, 1 not rated0 graded lakes · 1 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Max Depth | Access |
|---|---|---|---|---|---|---|---|---|
| NRSidie Hollow LakeVernon | NR | 12 ft | No recent samples | No recent samples | No recent samples | 22 ft | ✓ 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 Vernon 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.