LaPorte County Lake Quality
Wisconsin, 5 lakes, average grade B (Good)
LaPorte County has 5 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-wide average lands at B — solid water quality with most lakes carrying clear summer transparency and low-to-moderate phosphorus.
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. Umk-02 Lake (A) is the cleanest in the county.
Quick Answers for LaPorte County
Planning a trip? Check special fishing regulations for Umk-02 Lake, whether the fish are safe to eat, and the best times to fish — or browse the full Wisconsin regulations index.
All Lakes in LaPorte County
| Rank | Lake | Grade | Clarity | Max Depth | Phosphorus |
|---|---|---|---|---|---|
| 1 | Umk-02 Lake | A | 15.5 ft | - | - |
| 2 | Umk-04 Lake | A | 12.8 ft | - | - |
| 3 | Lmg-02 Lake | B | 6.6 ft | - | - |
| 4 | Umk-02 Lake | C | 5.6 ft | - | - |
| 5 | Umk-04 Lake | F | 1.5 ft | - | - |
Source: EPA National Aquatic Resource Surveys, 2026.