North Lake vs Okauchee Lake Site
Water quality, depth, fish species, and recreation comparison.
Okauchee Lake Site reads lower on nutrients and algae than North Lake. Both are in Waukesha County, Wisconsin.
North Lake and Okauchee Lake Site 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 readings are close: North Lake and Okauchee Lake Site sit within a narrow band of each other on phosphorus, chlorophyll-a and clarity. The per-parameter table below shows where the small differences actually live.
With readings 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.
North Lake
Moderate clarity, visible to about 8 ft.
Okauchee Lake Site
Murky, only visible to about 4.6 ft.
Side-by-Side Metrics
| Metric | North Lake | Okauchee Lake Site |
|---|---|---|
| Water Clarity | 8 ft Better | 4.6 ft |
| Phosphorus | 17.9 µg/L | 16.2 µg/L Better |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | 78.4 ft | 90 ft Better |
| Surface Area | 440 acres | 1,210 acres |
| Public Access | Unknown | Yes |
| Fish Species | 5 | 6 Better |
| 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.
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Verdict
North Lake and Okauchee Lake Site read the same on nutrients and algae overall. The tiebreakers come down to clarity (North Lake: 8 ft, Okauchee Lake Site: 4.6 ft) and what you want from the lake. North Lake has fewer fish species than Okauchee Lake Site.
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Where to stay near North Lake and Okauchee Lake Site
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Source: EPA National Aquatic Resource Surveys, 2026.