Otter Creek Lake vs Union Grove Lake
Water quality, depth, fish species, and recreation comparison.
Otter Creek Lake has a higher water quality grade (D, Poor) than Union Grove Lake (F, Very Poor). Both are in Tama County, Wisconsin.
Both Otter Creek Lake and Union Grove Lake 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. These two are within a letter of each other on the rubric — Otter Creek Lake (D) versus Union Grove 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.
Otter Creek Lake
Very murky, less than 1.3 ft of visibility.
Union Grove Lake
Very murky, less than 1.6 ft of visibility.
Side-by-Side Metrics
| Metric | Otter Creek Lake | Union Grove Lake |
|---|---|---|
| Overall Grade | D (Poor) | F (Very Poor) |
| Water Clarity | 1.3 ft | 1.6 ft |
| Phosphorus | No data | No data |
| Chlorophyll-a (Algae) | 24 µg/L | 88.5 µg/L |
| Maximum Depth | - | - |
| Surface Area | 60 acres | 117 acres |
| Public Access | Unknown | Unknown |
| Fish Species | 0 | 0 |
| Trophic State | eutrophic | hypereutrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Otter Creek Lake wins on overall water quality with a Grade D versus Union Grove Lake's Grade F. Water clarity: 1.3 ft vs 1.6 ft. For fishing diversity, Otter Creek Lake also leads with 0 species.