Hawthorn Lake vs Lake Keomah
Water quality, depth, fish species, and recreation comparison.
Hawthorn Lake has a higher water quality grade (D, Poor) than Lake Keomah (F, Very Poor). Both are in Mahaska County, Wisconsin.
Hawthorn Lake and Lake Keomah are both in Iowa — 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 — Hawthorn Lake (D) versus Lake Keomah (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.
Hawthorn Lake
Very murky, less than 2.4 ft of visibility.
Lake Keomah
Very murky, less than 1.5 ft of visibility.
Side-by-Side Metrics
| Metric | Hawthorn Lake | Lake Keomah |
|---|---|---|
| Overall Grade | D (Poor) | F (Very Poor) |
| Water Clarity | 2.4 ft | 1.5 ft |
| Phosphorus | No data | No data |
| Chlorophyll-a (Algae) | 27.5 µg/L | 63 µg/L |
| Maximum Depth | - | - |
| Surface Area | 160 acres | 82 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
Hawthorn Lake wins on overall water quality with a Grade D versus Lake Keomah's Grade F. Water clarity: 2.4 ft vs 1.5 ft. For fishing diversity, Hawthorn Lake also leads with 0 species.