Mark Twain Lake by Hwy J vs Monroe City Lake B Nr. Dam
Water quality, depth, fish species, and recreation comparison.
Monroe City Lake B Nr. Dam has a higher water quality grade (C, Fair) than Mark Twain Lake by Hwy J (C, Fair). Both are in Wisconsin.
Mark Twain Lake by Hwy J and Monroe City Lake B Nr. Dam are both in Missouri — 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. The grades are close: Mark Twain Lake by Hwy J (C) and Monroe City Lake B Nr. Dam (C) 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.
Mark Twain Lake by Hwy J
Murky, only visible to about 3.7 ft.
Monroe City Lake B Nr. Dam
No clarity data.
Side-by-Side Metrics
| Metric | Mark Twain Lake by Hwy J | Monroe City Lake B Nr. Dam |
|---|---|---|
| Overall Grade | C (Fair) | C (Fair) |
| Water Clarity | 3.7 ft | No data |
| Phosphorus | 33.6 µg/L | 44 µg/L |
| Chlorophyll-a (Algae) | 14.6 µg/L | No data |
| Maximum Depth | - | - |
| Surface Area | 5.9K acres | 50 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
Monroe City Lake B Nr. Dam wins on overall water quality with a Grade C versus Mark Twain Lake by Hwy J's Grade C. For fishing diversity, Monroe City Lake B Nr. Dam also leads with 0 species.