Nagawicka Lake vs Pewaukee Lake
Water quality, depth, fish species, and recreation comparison.
Nagawicka Lake and Pewaukee Lake both received the same overall water quality grade of B (Good). Both are in Waukesha County, Wisconsin.
Nagawicka Lake and Pewaukee Lake are both in Wisconsin — a same-state head-to-head where the comparison comes down to lake-specific differences in depth, watershed, and monitoring history rather than the broader state-level water-quality regime. The grades are close: Nagawicka Lake (B) and Pewaukee Lake (B) are within one letter of each other on our A–F scale. The per-parameter sub-grades below will show where the small differences actually live.
With grades this close, the choice between the two lakes turns on non-water-quality factors: depth, fish species, public access, distance from home. The per-lake pages below cover all of those.
Nagawicka Lake
Moderate clarity, visible to about 9.5 ft.
Pewaukee Lake
Moderate clarity, visible to about 7.5 ft.
Side-by-Side Metrics
| Metric | Nagawicka Lake | Pewaukee Lake |
|---|---|---|
| Overall Grade | B (Good) | B (Good) |
| Water Clarity | 9.5 ft Better | 7.5 ft |
| Phosphorus | 13.5 µg/L Better | 19.9 µg/L |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | 90 ft Better | 45 ft |
| Surface Area | 981 acres | 2,437 acres |
| Public Access | Yes | Yes |
| Fish Species | 5 | 5 |
| Trophic State | mesotrophic | mesotrophic |
A green ✓ marks the better value for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better). Surface area and trophic state carry no tick — a bigger lake is not a better lake.
Swap a lake
Compare Nagawicka Lake or Pewaukee Lake against a different lake.
Verdict
Both lakes earn the same Grade B. The tiebreakers come down to clarity (Nagawicka Lake: 9.5 ft, Pewaukee Lake: 7.5 ft) and what you want from the lake. Nagawicka Lake matches its peer on species count.
Source: EPA National Aquatic Resource Surveys, 2026.