White Perch
Invasive SpeciesFound in 7 lakes
White Perch appears on state infested-waters lists for 7 surface waters. Boaters and anglers moving gear in or out of those lakes carry a clean-drain-dry obligation under state law. 7 lakes — narrow enough that aggressive containment is still on the table. Most upper-Midwest invasives that established here did so quietly over a decade before anyone noticed, so a low number today is not a guarantee for tomorrow.
The presence of White Perch does not directly change a lake's LakeGrade rubric score — the grade measures the water itself, not the species inhabiting it. But invasive presence is a meaningful adjacent signal worth reading alongside the grade.
Lakes with White Perch
| Lake | County | State | Grade | Depth |
|---|---|---|---|---|
| Superior Lake | Cook | MN | A | - |
| Superior Lake | St. Louis | MN | A | - |
| Little Lake Deep | Cook | MN | B | - |
| Teal Lake Deep | Cook | MN | C | - |
| Duluth Lake | St. Louis | MN | D | - |
| Little Lake Inlet | Cook | MN | F | - |
| Little Lake Landing | Cook | MN | F | - |
Frequently Asked Questions
How many lakes have white perch?
White Perch has been documented in 7 graded lakes: 7 in Minnesota.
Does white perch affect water quality?
Invasive species can significantly affect lake ecosystems. They may alter nutrient cycling, displace native species, and change water clarity. Lakes with white perch should be monitored for changes in water quality over time.
Invasives Found With White Perch
Source: EPA National Aquatic Resource Surveys, 2026.