Jackson County Lake Quality
Wisconsin, 27 lakes, average grade D (Poor)
There are 27 graded lakes in Jackson County. The mix is varied enough that the county-level average tells you the broad strokes, not the choose-this-cabin specifics. The county-wide average grade is D — water quality issues are persistent across most of the monitored basins. 17 lakes fall into the F bracket outright.
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 Blue Valley Lake (C); the most-stressed is Nell Lake (F).
Quick Answers for Jackson County
Planning a trip? Check special fishing regulations for Blue Valley Lake, whether the fish are safe to eat, and the best times to fish — or browse the full Wisconsin regulations index.
All Lakes in Jackson County
| Rank | Lake | Grade | Clarity | Max Depth | Phosphorus |
|---|---|---|---|---|---|
| 1 | Blue Valley Lake | C | - | - | - |
| 2 | Klapmeyer Park Lake | C | - | - | - |
| 3 | Jacomo Lake | C | 3.3 ft | - | 20.5 µg/L |
| 4 | Longview Lake by Dam | C | 3.3 ft | - | 23.5 µg/L |
| 5 | Lotawana Lk. Lake | C | 4.6 ft | - | 31 µg/L |
| 6 | Prairie Lee Lake Nr. Dam | D | 3 ft | - | 43 µg/L |
| 7 | Longview L. Nr. Dam Lake | D | 3.2 ft | - | 54 µg/L |
| 8 | Lake Tapawingo | D | 2.6 ft | - | 46.3 µg/L |
| 9 | Blue Springs L. Nr. Dam Lake | D | 2.6 ft | - | 32.3 µg/L |
| 10 | Valley Lake | D | - | - | 76.3 µg/L |
| 11 | Lake of the Woods-Kc | F | 2 ft | - | 94.5 µg/L |
| 12 | Cottontail Lake | F | 1.6 ft | - | 86.5 µg/L |
| 13 | Coot Lake | F | 1.6 ft | - | 77.2 µg/L |
| 14 | Nell Lake | F | 1.3 ft | - | 132.5 µg/L |
| 15 | Jackrabbit Lake | F | 1.5 ft | - | 148.3 µg/L |
| 16 | Knox Village Lake | F | 2.2 ft | - | 210 µg/L |
| 17 | Gopher Lake | F | 1.2 ft | - | 145.7 µg/L |
| 18 | Mckee Prairie Pond | F | 1.3 ft | - | 130.8 µg/L |
| 19 | Troost Lake | F | - | - | 120.5 µg/L |
| 20 | Troost Lake | F | - | - | 155 µg/L |
| 21 | Firehouse Park Lake | F | - | - | 297 µg/L |
| 22 | Lake of the Woods | F | - | - | 111 µg/L |
| 23 | Kessler Lake | F | - | - | 270 µg/L |
| 24 | Blue River Parkway Lake | F | - | - | 264 µg/L |
| 25 | Catclaw Lake | F | - | - | 164 µg/L |
| 26 | Washington Lake | F | - | - | 96.2 µg/L |
| 27 | Loose Park Lake | F | - | - | - |
Source: EPA National Aquatic Resource Surveys, 2026.