Grove Lake vs Marlu Lake
Water quality, depth, fish species, and recreation comparison.
Grove Lake has a higher water quality grade (C, Fair) than Marlu Lake (D, Poor). Both are in Pope County, Minnesota.
Grove Lake and Marlu Lake are both in Minnesota — 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. These two are within a letter of each other on the rubric — Grove Lake (C) versus Marlu Lake (D). The deciding factors for a recreational visitor are likely physical (depth, access, fish species) rather than water-quality differences.
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.
Grove Lake
Murky, only visible to about 5.1 ft.
Marlu Lake
Murky, only visible to about 3.5 ft.
Side-by-Side Metrics
| Metric | Grove Lake | Marlu Lake |
|---|---|---|
| Overall Grade | C (Fair) | D (Poor) |
| Water Clarity | 5.1 ft | 3.5 ft |
| Phosphorus | 25 µg/L | No data |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | - | - |
| Surface Area | 364 acres | 320 acres |
| Public Access | Unknown | Unknown |
| Fish Species | 1 | 0 |
| Trophic State | eutrophic | eutrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Grove Lake wins on overall water quality with a Grade C versus Marlu Lake's Grade D. Water clarity: 5.1 ft vs 3.5 ft. For fishing diversity, Grove Lake also leads with 1 species.