La Crosse County Lake Quality
Wisconsin, 1 lakes, average grade F (Very Poor)
Only 1 lakes in La Crosse County carry an active grade. The county-level summary is therefore representative of those specific lakes, not necessarily of every water body in the county. The county average is F — the most-stressed bracket in our rubric. Most monitored lakes here show persistent nutrient loading and algal pressure.
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. Neshonoc Lake (F) is the cleanest in the county.
Quick Answers for La Crosse County
Planning a trip? Check special fishing regulations for Neshonoc Lake, and the best times to fish — or browse the full Wisconsin regulations index.
DNR Reports (26)
Wisconsin DNR Fisheries Survey resources for lakes in La Crosse County. Showing 12 most recent — browse all reports →
- 2024Lake Neshonoc netting survey, 2024Netting Survey · WI DNR · 2024 (PDF)
- 2020Mississippi River, Lake Onalaska gamefish assessment, 2020Fisheries Survey · WI DNR · 2020 (PDF)
- 2019Experimental Spring Walleye Juvenile and Adult Assessment, Pool 8, 2018 and 2019Walleye Survey · WI DNR · 2019 (PDF)
- 2019Mississippi River Pool 8 Fall walleye and sauger young of year assessment, 2019Walleye Survey · WI DNR · 2019 (PDF)
- 2019Mississippi River Pool 8 Richmond Bay isolated pond, 2019Fisheries Survey · WI DNR · 2019 (PDF)
- 2019Mississippi River Pool 8/9 smallmouth bass assessment, 2019Fisheries Survey · WI DNR · 2019 (PDF)
- 2018Fisheries assessment in Richmond Bay (isolated pond), Pool 8, 2018Fisheries Survey · WI DNR · 2018 (PDF)
- 2018Fisheries assessment in the Black River channel, Pool 7, 2018Fisheries Survey · WI DNR · 2018 (PDF)
- 2018Fisheries assessment in the Black River mouth, Pool 7, 2018Fisheries Survey · WI DNR · 2018 (PDF)
- 2018Mississippi River Pool 8 Fall Walleye and Sauger Young-of-the-Year Assessment, 2018Walleye Survey · WI DNR · 2018 (PDF)
- 2018Walleye and sauger assessments in Pool 8, 2018Walleye Survey · WI DNR · 2018 (PDF)
- 2017Mississippi River Pool 8 Fall Walleye and Sauger Young-of-the-Year Assessment, 2017Walleye Survey · WI DNR · 2017 (PDF)
All Lakes in La Crosse County
| Rank | Lake | Grade | Clarity | Max Depth | Phosphorus |
|---|---|---|---|---|---|
| 1 | Neshonoc Lake | F | 0.4 ft | - | - |
Source: EPA National Aquatic Resource Surveys, 2026.