D
Marathon County Lake Quality
Wisconsin — 13 lakes, average grade D (Poor)
All Lakes in Marathon County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Big Bass Lake - | A | 6m | 19 µg/L |
| 2 | Pike Lake - | A | 5m | 29.3 µg/L |
| 3 | Wisconsin River Lake | B | 3.5m | — |
| 4 | Lake Dubay - N Marietta Ln | C | 2.5m | — |
| 5 | Lake Dubay - Peplin | C | 2.5m | 63.6 µg/L |
| 6 | Big Eau Pleine Reservoir - Middle Segment Cty Park Landing | D | 1.25m | — |
| 7 | Big Eau Pleine Southeast Point Lake | D | 1.5m | — |
| 8 | Big Eau Pleine Lake - | F | 1m | — |
| 9 | Big Eau Pleine Reservoir - Main Channel River Mile 3 | F | 0.6m | 115.8 µg/L |
| 10 | Big Eau Pleine Reservoir - Upper | F | 0.55m | 186.5 µg/L |
| 11 | Big Eau Pleine Reservoir - | F | 0.6m | 145.5 µg/L |
| 12 | Big Eau Pleine Reservoir - Upper Segment N Side 1st | F | 1m | — |
| 13 | Big Eau Pleine Reservoir - Lower | F | 0.65m | 93.3 µg/L |