Allie Lake vs Preston Lake
Water quality, depth, fish species, and recreation comparison.
Preston Lake has a higher water quality grade (F, Very Poor) than Allie Lake (F, Very Poor). Both are in Renville County, Minnesota.
Allie Lake and Preston 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 — Allie Lake (F) versus Preston Lake (F). 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.
Allie Lake
Very murky, less than 2 ft of visibility.
Preston Lake
Murky, only visible to about 5 ft.
Side-by-Side Metrics
| Metric | Allie Lake | Preston Lake |
|---|---|---|
| Overall Grade | F (Very Poor) | F (Very Poor) |
| Water Clarity | 2 ft | 5 ft |
| Phosphorus | 232 µg/L | 222 µg/L |
| Chlorophyll-a (Algae) | 98.3 µg/L | 44.1 µg/L |
| Maximum Depth | 12 ft | 11 ft |
| Surface Area | 509.13 acres | 654.96 acres |
| Public Access | Yes | Yes |
| Fish Species | 1 | 1 |
| Trophic State | hypereutrophic | eutrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Preston Lake wins on overall water quality with a Grade F versus Allie Lake's Grade F. Water clarity: 5 ft vs 2 ft. For fishing diversity, Preston Lake also leads with 1 species.