Flowering Rush
Invasive SpeciesFound in 62 lakes
Flowering Rush appears on the {{stateName}} infested-waters lists for 62 surface waters. Boaters and anglers moving gear in or out of those lakes carry a clean-drain-dry obligation under state law. With 62 documented lakes, Flowering Rush sits in the middle of the invasion curve — established enough that prevention requires real coordination, not so widespread that containment is hopeless.
The presence of Flowering Rush 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 Flowering Rush
| Lake | County | State | Grade | Depth |
|---|---|---|---|---|
| Unnamed Lake | Otter Tail | MN | A | 95 ft |
| Trout Lake | Itasca | MN | A | 135 ft |
| Bass Lake | Otter Tail | MN | A | - |
| Pickerel Lake | Becker | MN | A | 74 ft |
| Long Lake | Waushara | WI | A | 71 ft |
| Silver Lake | Waushara | WI | A | 56 ft |
| Round Lake | Sawyer | WI | A | 74 ft |
| White River Flowage Lake | Waushara | WI | A | 20 ft |
| Lake Emily | Portage | WI | A | 35 ft |
| Minocqua Lake | Oneida | WI | A | 60 ft |
| Archibald Lake | Oconto | WI | A | 50 ft |
| High Falls Reservoir at | Marinette | WI | A | 54 ft |
| Mallard Lake | Milwaukee | WI | A | 10 ft |
| Detroit Lake | Becker | MN | A | 89 ft |
| Melissa Lake | Becker | MN | A | 37 ft |
| Little Pelican Lake | Otter Tail | MN | A | 25 ft |
| Leek Lake | Otter Tail | MN | A | - |
| White Lake | Waupaca | WI | A | 10 ft |
| Tichigan Lake | Racine | WI | A | 63 ft |
| School Section Lake | Waupaca | WI | A | 38 ft |
| Mid Lake | Oneida | WI | A | - |
| Sallie Lake | Becker | MN | B | 50 ft |
| Spider Lake | Itasca | MN | B | 36 ft |
| Mill Lake | Becker | MN | B | 10 ft |
| North Twin Lake | Itasca | MN | B | 42 ft |
| South Twin Lake | Itasca | MN | B | 40 ft |
| Muskrat Lake | Becker | MN | B | 18 ft |
| North Lake 3 | Goodhue | MN | B | - |
| Minnetonka Lake | Hennepin | MN | B | 113 ft |
| Glawe Lake | Becker | MN | B | 24 ft |
| North Lake 2 | Goodhue | MN | C | - |
| Sturgeon Lake 2 | Goodhue | MN | C | - |
| Big Sandy Lake | Aitkin | MN | C | 84 ft |
| Stalker Lake | Otter Tail | MN | C | 95 ft |
| North Lake 1 | Goodhue | MN | C | - |
| Forest Lake | Washington | MN | C | 37 ft |
| Sturgeon Lake 1 | Goodhue | MN | C | - |
| Sturgeon Lake 3 | Goodhue | MN | C | - |
| Lake | Columbia | WI | C | 24 ft |
| Lake Wisconsin Columbia Co. | Columbia | WI | C | 24 ft |
| Lake Winneconne | Winnebago | WI | C | 9 ft |
| Machickanee Flowage Lake | Oconto | WI | C | 21 ft |
| Lake Butte des Morts | Winnebago | WI | C | 9 ft |
| Lake Poygan | Winnebago | WI | C | 11 ft |
| Lake Wisconsin Palisade Street Bay | Sauk | WI | C | 24 ft |
| A2 Lake | Oconto | WI | C | 50 ft |
| Sauk Lake | Stearns | MN | C | 61 ft |
| Granite Lake | Wright | MN | C | 34 ft |
| Bald Eagle Lake | Ramsey | MN | C | 36 ft |
| Amelia Lake | Anoka | MN | C | - |
Showing 50 of 62 infested lakes.
Frequently Asked Questions
How many lakes have flowering rush?
Flowering Rush has been documented in 62 lakes, 38 in Minnesota and 24 in Wisconsin.
Does flowering rush affect water quality?
Invasive species can significantly affect lake ecosystems. They may alter nutrient cycling, displace native species, and change water clarity. Lakes with flowering rush should be monitored for changes in water quality over time.
Source: EPA National Aquatic Resource Surveys, 2026.