Gasconade County Lake Quality
Missouri, 4 lakes, average grade C (Fair)
Gasconade County has 4 graded lakes — a thin enough sample that one or two stressed lakes can move the county average noticeably. Use the per-lake pages below for what actually matters. The county average is C — the middle of the rubric, with one or two lakes pulling the average up or down depending on year.
Most of the county's monitored lakes are shallow — under 50 feet — which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Seetal Lake (B) is the cleanest in the county.
Quick Answers for Gasconade County
Planning a trip? Check special fishing regulations for Seetal Lake — or check the official Missouri fishing regulations.
All Lakes in Gasconade County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Seetal Lake | B | 7.2 ft | 17 µg/L |
| 2 | Lost Valley Lake | C | 3.9 ft | 22.7 µg/L |
| 3 | Peaceful Valley Lake | C | 4 ft | 25.7 µg/L |
| 4 | Peaceful Valley Lake | C | 3.8 ft | 24.5 µg/L |
Other Counties in Missouri
See how Gasconade County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 15 states.
Where to stay near Gasconade County
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Source: EPA National Aquatic Resource Surveys, 2026.