Perry County Lake Quality
Missouri, 3 lakes, average grade B (Good)
Only 3 lakes in Perry County carry an active grade. The county-level summary is therefore representative of those specific lakes, not necessarily of every water body in the county. With an average grade of B, Perry County sits comfortably above the Missouri median.
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. Port Perry Lake (A) is the cleanest in the county.
Quick Answers for Perry County
Planning a trip? Check special fishing regulations for Port Perry Lake — or check the official Missouri fishing regulations.
All Lakes in Perry County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Port Perry Lake | A | 12 ft | 8.3 µg/L |
| 2 | Port Perry Lake South Arm | B | 9.5 ft | 8.3 µg/L |
| 3 | Port Perry Lake North Arm | B | 7.4 ft | 9.5 µg/L |
Other Counties in Missouri
See how Perry 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 Perry County
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Source: EPA National Aquatic Resource Surveys, 2026.