Washington County Lake Quality
Wisconsin, 15 lakes, average grade B (Good)
There are 15 graded lakes in Washington County. The mix is varied enough that the county-level average tells you the broad strokes, not the choose-this-cabin specifics. With an average grade of B, Washington County sits comfortably above the Wisconsin median.
A meaningful share of Washington's lakes break 50 feet of depth, which matters because deep lakes hold cooler water all summer and resist the resuspended-sediment problems that plague shallow basins. The county's best-graded lake is Big Cedar Lake (A).
Quick Answers for Washington County
Planning a trip? Check special fishing regulations for Big Cedar Lake, whether the fish are safe to eat, and the best times to fish — or browse the full Wisconsin regulations index.
All Lakes in Washington County
| Rank | Lake | Grade | Clarity | Max Depth | Phosphorus |
|---|---|---|---|---|---|
| 1 | Big Cedar Lake | A | 16.4 ft | 105 ft | 14.1 µg/L |
| 2 | Amy Bell Lake | A | - | 37 ft | 19.5 µg/L |
| 3 | Big Cedar Lake-North Site-Near West Bend | A | 11.8 ft | 105 ft | 17.5 µg/L |
| 4 | Big Cedar Lake-South Site-Near West Bend | A | 12.6 ft | 105 ft | 15 µg/L |
| 5 | Lake Five | A | 12 ft | 23 ft | 14.7 µg/L |
| 6 | Little Cedar Lake | A | 10.5 ft | - | 12.1 µg/L |
| 7 | Pike Lake | B | 7 ft | 45 ft | 19.3 µg/L |
| 8 | Green Lake | B | 9 ft | 37 ft | 16.6 µg/L |
| 9 | Big Cedar Lake | B | 9.8 ft | 105 ft | 15.5 µg/L |
| 10 | Little Friess Lake | B | 7.4 ft | 34 ft | 26.1 µg/L |
| 11 | Big Cedar Lake Northern Basin Deep Site | B | 8.7 ft | 105 ft | 21 µg/L |
| 12 | Druid Lake | C | 5.5 ft | 53 ft | 23.7 µg/L |
| 13 | Bark Lake | C | 5.5 ft | 34 ft | 33 µg/L |
| 14 | Friess Lake | C | 4 ft | 48 ft | 33 µg/L |
| 15 | Smith Lake | D | 4 ft | 5 ft | - |
Source: EPA National Aquatic Resource Surveys, 2026.