Corydon Reservoir vs Humeston Reservoir
Water quality, depth, fish species, and recreation comparison.
Corydon Reservoir and Humeston Reservoir both received the same overall water quality grade of F (Very Poor). Both are in Wayne County, Wisconsin.
Both Corydon Reservoir and Humeston Reservoir sit in Iowa. A same-state comparison strips out the state-level water-quality regime as a variable: any grade differences here are about the lakes themselves, not the agencies grading them. The grades are close: Corydon Reservoir (F) and Humeston Reservoir (F) are within one letter of each other on the LakeGrade rubric. 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.
Corydon Reservoir
Very murky, less than 1.9 ft of visibility.
Humeston Reservoir
Very murky, less than 1.6 ft of visibility.
Side-by-Side Metrics
| Metric | Corydon Reservoir | Humeston Reservoir |
|---|---|---|
| Overall Grade | F (Very Poor) | F (Very Poor) |
| Water Clarity | 1.9 ft | 1.6 ft |
| Phosphorus | No data | No data |
| Chlorophyll-a (Algae) | 44 µg/L | 41.4 µg/L |
| Maximum Depth | - | - |
| Surface Area | 66.9 acres | 37.4 acres |
| Public Access | Unknown | Unknown |
| Fish Species | 0 | 0 |
| Trophic State | eutrophic | eutrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Both lakes earn the same Grade F. The tiebreakers come down to clarity (Corydon Reservoir: 1.9 ft, Humeston Reservoir: 1.6 ft) and what you want from the lake. Corydon Reservoir matches its peer on species count.