Harrison County Lake Quality
Wisconsin, 1 lakes, average grade B (Good)
Only 1 lakes in Harrison 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-wide average lands at B — solid water quality with most lakes carrying clear summer transparency and low-to-moderate phosphorus.
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 Obs-06 Lake (B); the most-stressed is Obs-06 Lake (B).
Quick Answers for Harrison County
Planning a trip? Check special fishing regulations for Obs-06 Lake, whether the fish are safe to eat, and the best times to fish — or browse the full Wisconsin regulations index.
All Lakes in Harrison County
| Rank | Lake | Grade | Clarity | Max Depth | Phosphorus |
|---|---|---|---|---|---|
| 1 | Obs-06 Lake | B | 5.4 ft | - | - |
Source: EPA National Aquatic Resource Surveys, 2026.